1 ============================================== 1 ===============================================
2 How to conserve battery power using laptop-mod 2 How to conserve battery power using laptop-mode
3 ============================================== 3 ===============================================
4 4
5 Document Author: Bart Samwel (bart@samwel.tk) 5 Document Author: Bart Samwel (bart@samwel.tk)
6 6
7 Date created: January 2, 2004 7 Date created: January 2, 2004
8 8
9 Last modified: December 06, 2004 9 Last modified: December 06, 2004
10 10
11 Introduction 11 Introduction
12 ------------ 12 ------------
13 13
14 Laptop mode is used to minimize the time that 14 Laptop mode is used to minimize the time that the hard disk needs to be spun up,
15 to conserve battery power on laptops. It has b 15 to conserve battery power on laptops. It has been reported to cause significant
16 power savings. 16 power savings.
17 17
18 .. Contents 18 .. Contents
19 19
20 * Introduction 20 * Introduction
21 * Installation 21 * Installation
22 * Caveats 22 * Caveats
23 * The Details 23 * The Details
24 * Tips & Tricks 24 * Tips & Tricks
25 * Control script 25 * Control script
26 * ACPI integration 26 * ACPI integration
27 * Monitoring tool 27 * Monitoring tool
28 28
29 29
30 Installation 30 Installation
31 ------------ 31 ------------
32 32
33 To use laptop mode, you don't need to set any 33 To use laptop mode, you don't need to set any kernel configuration options
34 or anything. Simply install all the files incl 34 or anything. Simply install all the files included in this document, and
35 laptop mode will automatically be started when 35 laptop mode will automatically be started when you're on battery. For
36 your convenience, a tarball containing an inst 36 your convenience, a tarball containing an installer can be downloaded at:
37 37
38 http://www.samwel.tk/laptop_mode/lapto 38 http://www.samwel.tk/laptop_mode/laptop_mode/
39 39
40 To configure laptop mode, you need to edit the 40 To configure laptop mode, you need to edit the configuration file, which is
41 located in /etc/default/laptop-mode on Debian- 41 located in /etc/default/laptop-mode on Debian-based systems, or in
42 /etc/sysconfig/laptop-mode on other systems. 42 /etc/sysconfig/laptop-mode on other systems.
43 43
44 Unfortunately, automatic enabling of laptop mo 44 Unfortunately, automatic enabling of laptop mode does not work for
45 laptops that don't have ACPI. On those laptops 45 laptops that don't have ACPI. On those laptops, you need to start laptop
46 mode manually. To start laptop mode, run "lapt 46 mode manually. To start laptop mode, run "laptop_mode start", and to
47 stop it, run "laptop_mode stop". (Note: The la 47 stop it, run "laptop_mode stop". (Note: The laptop mode tools package now
48 has experimental support for APM, you might wa 48 has experimental support for APM, you might want to try that first.)
49 49
50 50
51 Caveats 51 Caveats
52 ------- 52 -------
53 53
54 * The downside of laptop mode is that you have 54 * The downside of laptop mode is that you have a chance of losing up to 10
55 minutes of work. If you cannot afford this, 55 minutes of work. If you cannot afford this, don't use it! The supplied ACPI
56 scripts automatically turn off laptop mode w 56 scripts automatically turn off laptop mode when the battery almost runs out,
57 so that you won't lose any data at the end o 57 so that you won't lose any data at the end of your battery life.
58 58
59 * Most desktop hard drives have a very limited 59 * Most desktop hard drives have a very limited lifetime measured in spindown
60 cycles, typically about 50.000 times (it's u 60 cycles, typically about 50.000 times (it's usually listed on the spec sheet).
61 Check your drive's rating, and don't wear do 61 Check your drive's rating, and don't wear down your drive's lifetime if you
62 don't need to. 62 don't need to.
63 63
64 * If you mount some of your ext3/reiserfs file 64 * If you mount some of your ext3/reiserfs filesystems with the -n option, then
65 the control script will not be able to remou 65 the control script will not be able to remount them correctly. You must set
66 DO_REMOUNTS=0 in the control script, otherwi 66 DO_REMOUNTS=0 in the control script, otherwise it will remount them with the
67 wrong options -- or it will fail because it 67 wrong options -- or it will fail because it cannot write to /etc/mtab.
68 68
69 * If you have your filesystems listed as type 69 * If you have your filesystems listed as type "auto" in fstab, like I did, then
70 the control script will not recognize them a 70 the control script will not recognize them as filesystems that need remounting.
71 You must list the filesystems with their tru 71 You must list the filesystems with their true type instead.
72 72
73 * It has been reported that some versions of t 73 * It has been reported that some versions of the mutt mail client use file access
74 times to determine whether a folder contains 74 times to determine whether a folder contains new mail. If you use mutt and
75 experience this, you must disable the noatim 75 experience this, you must disable the noatime remounting by setting the option
76 DO_REMOUNT_NOATIME to 0 in the configuration 76 DO_REMOUNT_NOATIME to 0 in the configuration file.
77 77
78 78
79 The Details 79 The Details
80 ----------- 80 -----------
81 81
82 Laptop mode is controlled by the knob /proc/sy 82 Laptop mode is controlled by the knob /proc/sys/vm/laptop_mode. This knob is
83 present for all kernels that have the laptop m 83 present for all kernels that have the laptop mode patch, regardless of any
84 configuration options. When the knob is set, a 84 configuration options. When the knob is set, any physical disk I/O (that might
85 have caused the hard disk to spin up) causes L 85 have caused the hard disk to spin up) causes Linux to flush all dirty blocks. The
86 result of this is that after a disk has spun d 86 result of this is that after a disk has spun down, it will not be spun up
87 anymore to write dirty blocks, because those b 87 anymore to write dirty blocks, because those blocks had already been written
88 immediately after the most recent read operati 88 immediately after the most recent read operation. The value of the laptop_mode
89 knob determines the time between the occurrenc 89 knob determines the time between the occurrence of disk I/O and when the flush
90 is triggered. A sensible value for the knob is 90 is triggered. A sensible value for the knob is 5 seconds. Setting the knob to
91 0 disables laptop mode. 91 0 disables laptop mode.
92 92
93 To increase the effectiveness of the laptop_mo 93 To increase the effectiveness of the laptop_mode strategy, the laptop_mode
94 control script increases dirty_expire_centisec 94 control script increases dirty_expire_centisecs and dirty_writeback_centisecs in
95 /proc/sys/vm to about 10 minutes (by default), 95 /proc/sys/vm to about 10 minutes (by default), which means that pages that are
96 dirtied are not forced to be written to disk a 96 dirtied are not forced to be written to disk as often. The control script also
97 changes the dirty background ratio, so that ba 97 changes the dirty background ratio, so that background writeback of dirty pages
98 is not done anymore. Combined with a higher co 98 is not done anymore. Combined with a higher commit value (also 10 minutes) for
99 ext3 or ReiserFS filesystems (also done automa 99 ext3 or ReiserFS filesystems (also done automatically by the control script),
100 this results in concentration of disk activity 100 this results in concentration of disk activity in a small time interval which
101 occurs only once every 10 minutes, or whenever 101 occurs only once every 10 minutes, or whenever the disk is forced to spin up by
102 a cache miss. The disk can then be spun down i 102 a cache miss. The disk can then be spun down in the periods of inactivity.
103 103
>> 104 If you want to find out which process caused the disk to spin up, you can
>> 105 gather information by setting the flag /proc/sys/vm/block_dump. When this flag
>> 106 is set, Linux reports all disk read and write operations that take place, and
>> 107 all block dirtyings done to files. This makes it possible to debug why a disk
>> 108 needs to spin up, and to increase battery life even more. The output of
>> 109 block_dump is written to the kernel output, and it can be retrieved using
>> 110 "dmesg". When you use block_dump and your kernel logging level also includes
>> 111 kernel debugging messages, you probably want to turn off klogd, otherwise
>> 112 the output of block_dump will be logged, causing disk activity that is not
>> 113 normally there.
>> 114
104 115
105 Configuration 116 Configuration
106 ------------- 117 -------------
107 118
108 The laptop mode configuration file is located 119 The laptop mode configuration file is located in /etc/default/laptop-mode on
109 Debian-based systems, or in /etc/sysconfig/lap 120 Debian-based systems, or in /etc/sysconfig/laptop-mode on other systems. It
110 contains the following options: 121 contains the following options:
111 122
112 MAX_AGE: 123 MAX_AGE:
113 124
114 Maximum time, in seconds, of hard drive spindo 125 Maximum time, in seconds, of hard drive spindown time that you are
115 comfortable with. Worst case, it's possible th 126 comfortable with. Worst case, it's possible that you could lose this
116 amount of work if your battery fails while you 127 amount of work if your battery fails while you're in laptop mode.
117 128
118 MINIMUM_BATTERY_MINUTES: 129 MINIMUM_BATTERY_MINUTES:
119 130
120 Automatically disable laptop mode if the remai 131 Automatically disable laptop mode if the remaining number of minutes of
121 battery power is less than this value. Default 132 battery power is less than this value. Default is 10 minutes.
122 133
123 AC_HD/BATT_HD: 134 AC_HD/BATT_HD:
124 135
125 The idle timeout that should be set on your ha 136 The idle timeout that should be set on your hard drive when laptop mode
126 is active (BATT_HD) and when it is not active 137 is active (BATT_HD) and when it is not active (AC_HD). The defaults are
127 20 seconds (value 4) for BATT_HD and 2 hours 138 20 seconds (value 4) for BATT_HD and 2 hours (value 244) for AC_HD. The
128 possible values are those listed in the manual 139 possible values are those listed in the manual page for "hdparm" for the
129 "-S" option. 140 "-S" option.
130 141
131 HD: 142 HD:
132 143
133 The devices for which the spindown timeout sho 144 The devices for which the spindown timeout should be adjusted by laptop mode.
134 Default is /dev/hda. If you specify multiple d 145 Default is /dev/hda. If you specify multiple devices, separate them by a space.
135 146
136 READAHEAD: 147 READAHEAD:
137 148
138 Disk readahead, in 512-byte sectors, while lap 149 Disk readahead, in 512-byte sectors, while laptop mode is active. A large
139 readahead can prevent disk accesses for things 150 readahead can prevent disk accesses for things like executable pages (which are
140 loaded on demand while the application execute 151 loaded on demand while the application executes) and sequentially accessed data
141 (MP3s). 152 (MP3s).
142 153
143 DO_REMOUNTS: 154 DO_REMOUNTS:
144 155
145 The control script automatically remounts any 156 The control script automatically remounts any mounted journaled filesystems
146 with appropriate commit interval options. When 157 with appropriate commit interval options. When this option is set to 0, this
147 feature is disabled. 158 feature is disabled.
148 159
149 DO_REMOUNT_NOATIME: 160 DO_REMOUNT_NOATIME:
150 161
151 When remounting, should the filesystems be rem 162 When remounting, should the filesystems be remounted with the noatime option?
152 Normally, this is set to "1" (enabled), but th 163 Normally, this is set to "1" (enabled), but there may be programs that require
153 access time recording. 164 access time recording.
154 165
155 DIRTY_RATIO: 166 DIRTY_RATIO:
156 167
157 The percentage of memory that is allowed to co 168 The percentage of memory that is allowed to contain "dirty" or unsaved data
158 before a writeback is forced, while laptop mod 169 before a writeback is forced, while laptop mode is active. Corresponds to
159 the /proc/sys/vm/dirty_ratio sysctl. 170 the /proc/sys/vm/dirty_ratio sysctl.
160 171
161 DIRTY_BACKGROUND_RATIO: 172 DIRTY_BACKGROUND_RATIO:
162 173
163 The percentage of memory that is allowed to co 174 The percentage of memory that is allowed to contain "dirty" or unsaved data
164 after a forced writeback is done due to an exc 175 after a forced writeback is done due to an exceeding of DIRTY_RATIO. Set
165 this nice and low. This corresponds to the /pr 176 this nice and low. This corresponds to the /proc/sys/vm/dirty_background_ratio
166 sysctl. 177 sysctl.
167 178
168 Note that the behaviour of dirty_background_ra 179 Note that the behaviour of dirty_background_ratio is quite different
169 when laptop mode is active and when it isn't. 180 when laptop mode is active and when it isn't. When laptop mode is inactive,
170 dirty_background_ratio is the threshold percen 181 dirty_background_ratio is the threshold percentage at which background writeouts
171 start taking place. When laptop mode is active 182 start taking place. When laptop mode is active, however, background writeouts
172 are disabled, and the dirty_background_ratio o 183 are disabled, and the dirty_background_ratio only determines how much writeback
173 is done when dirty_ratio is reached. 184 is done when dirty_ratio is reached.
174 185
175 DO_CPU: 186 DO_CPU:
176 187
177 Enable CPU frequency scaling when in laptop mo 188 Enable CPU frequency scaling when in laptop mode. (Requires CPUFreq to be setup.
178 See Documentation/admin-guide/pm/cpufreq.rst f 189 See Documentation/admin-guide/pm/cpufreq.rst for more info. Disabled by default.)
179 190
180 CPU_MAXFREQ: 191 CPU_MAXFREQ:
181 192
182 When on battery, what is the maximum CPU speed 193 When on battery, what is the maximum CPU speed that the system should use? Legal
183 values are "slowest" for the slowest speed tha 194 values are "slowest" for the slowest speed that your CPU is able to operate at,
184 or a value listed in /sys/devices/system/cpu/c 195 or a value listed in /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies.
185 196
186 197
187 Tips & Tricks 198 Tips & Tricks
188 ------------- 199 -------------
189 200
190 * Bartek Kania reports getting up to 50 minute 201 * Bartek Kania reports getting up to 50 minutes of extra battery life (on top
191 of his regular 3 to 3.5 hours) using a spind 202 of his regular 3 to 3.5 hours) using a spindown time of 5 seconds (BATT_HD=1).
192 203
193 * You can spin down the disk while playing MP3 204 * You can spin down the disk while playing MP3, by setting disk readahead
194 to 8MB (READAHEAD=16384). Effectively, the d 205 to 8MB (READAHEAD=16384). Effectively, the disk will read a complete MP3 at
195 once, and will then spin down while the MP3 206 once, and will then spin down while the MP3 is playing. (Thanks to Bartek
196 Kania.) 207 Kania.)
197 208
198 * Drew Scott Daniels observed: "I don't know w 209 * Drew Scott Daniels observed: "I don't know why, but when I decrease the number
199 of colours that my display uses it consumes 210 of colours that my display uses it consumes less battery power. I've seen
200 this on powerbooks too. I hope that this is 211 this on powerbooks too. I hope that this is a piece of information that
201 might be useful to the Laptop Mode patch or 212 might be useful to the Laptop Mode patch or its users."
202 213
203 * In syslog.conf, you can prefix entries with 214 * In syslog.conf, you can prefix entries with a dash `-` to omit syncing the
204 file after every logging. When you're using 215 file after every logging. When you're using laptop-mode and your disk doesn't
205 spin down, this is a likely culprit. 216 spin down, this is a likely culprit.
206 217
207 * Richard Atterer observed that laptop mode do 218 * Richard Atterer observed that laptop mode does not work well with noflushd
208 (http://noflushd.sourceforge.net/), it seems 219 (http://noflushd.sourceforge.net/), it seems that noflushd prevents laptop-mode
209 from doing its thing. 220 from doing its thing.
210 221
211 * If you're worried about your data, you might 222 * If you're worried about your data, you might want to consider using a USB
212 memory stick or something like that as a "wo 223 memory stick or something like that as a "working area". (Be aware though
213 that flash memory can only handle a limited 224 that flash memory can only handle a limited number of writes, and overuse
214 may wear out your memory stick pretty quickl 225 may wear out your memory stick pretty quickly. Do _not_ use journalling
215 filesystems on flash memory sticks.) 226 filesystems on flash memory sticks.)
216 227
217 228
218 Configuration file for control and ACPI batter 229 Configuration file for control and ACPI battery scripts
219 ---------------------------------------------- 230 -------------------------------------------------------
220 231
221 This allows the tunables to be changed for the 232 This allows the tunables to be changed for the scripts via an external
222 configuration file 233 configuration file
223 234
224 It should be installed as /etc/default/laptop- 235 It should be installed as /etc/default/laptop-mode on Debian, and as
225 /etc/sysconfig/laptop-mode on Red Hat, SUSE, M 236 /etc/sysconfig/laptop-mode on Red Hat, SUSE, Mandrake, and other work-alikes.
226 237
227 Config file:: 238 Config file::
228 239
229 # Maximum time, in seconds, of hard drive sp 240 # Maximum time, in seconds, of hard drive spindown time that you are
230 # comfortable with. Worst case, it's possibl 241 # comfortable with. Worst case, it's possible that you could lose this
231 # amount of work if your battery fails you w 242 # amount of work if your battery fails you while in laptop mode.
232 #MAX_AGE=600 243 #MAX_AGE=600
233 244
234 # Automatically disable laptop mode when the 245 # Automatically disable laptop mode when the number of minutes of battery
235 # that you have left goes below this thresho 246 # that you have left goes below this threshold.
236 MINIMUM_BATTERY_MINUTES=10 247 MINIMUM_BATTERY_MINUTES=10
237 248
238 # Read-ahead, in 512-byte sectors. You can s 249 # Read-ahead, in 512-byte sectors. You can spin down the disk while playing MP3/OGG
239 # by setting the disk readahead to 8MB (READ 250 # by setting the disk readahead to 8MB (READAHEAD=16384). Effectively, the disk
240 # will read a complete MP3 at once, and will 251 # will read a complete MP3 at once, and will then spin down while the MP3/OGG is
241 # playing. 252 # playing.
242 #READAHEAD=4096 253 #READAHEAD=4096
243 254
244 # Shall we remount journaled fs. with approp 255 # Shall we remount journaled fs. with appropriate commit interval? (1=yes)
245 #DO_REMOUNTS=1 256 #DO_REMOUNTS=1
246 257
247 # And shall we add the "noatime" option to t 258 # And shall we add the "noatime" option to that as well? (1=yes)
248 #DO_REMOUNT_NOATIME=1 259 #DO_REMOUNT_NOATIME=1
249 260
250 # Dirty synchronous ratio. At this percenta 261 # Dirty synchronous ratio. At this percentage of dirty pages the process
251 # which 262 # which
252 # calls write() does its own writeback 263 # calls write() does its own writeback
253 #DIRTY_RATIO=40 264 #DIRTY_RATIO=40
254 265
255 # 266 #
256 # Allowed dirty background ratio, in percent 267 # Allowed dirty background ratio, in percent. Once DIRTY_RATIO has been
257 # exceeded, the kernel will wake flusher thr 268 # exceeded, the kernel will wake flusher threads which will then reduce the
258 # amount of dirty memory to dirty_background 269 # amount of dirty memory to dirty_background_ratio. Set this nice and low,
259 # so once some writeout has commenced, we do 270 # so once some writeout has commenced, we do a lot of it.
260 # 271 #
261 #DIRTY_BACKGROUND_RATIO=5 272 #DIRTY_BACKGROUND_RATIO=5
262 273
263 # kernel default dirty buffer age 274 # kernel default dirty buffer age
264 #DEF_AGE=30 275 #DEF_AGE=30
265 #DEF_UPDATE=5 276 #DEF_UPDATE=5
266 #DEF_DIRTY_BACKGROUND_RATIO=10 277 #DEF_DIRTY_BACKGROUND_RATIO=10
267 #DEF_DIRTY_RATIO=40 278 #DEF_DIRTY_RATIO=40
268 #DEF_XFS_AGE_BUFFER=15 279 #DEF_XFS_AGE_BUFFER=15
269 #DEF_XFS_SYNC_INTERVAL=30 280 #DEF_XFS_SYNC_INTERVAL=30
270 #DEF_XFS_BUFD_INTERVAL=1 281 #DEF_XFS_BUFD_INTERVAL=1
271 282
272 # This must be adjusted manually to the valu 283 # This must be adjusted manually to the value of HZ in the running kernel
273 # on 2.4, until the XFS people change their 284 # on 2.4, until the XFS people change their 2.4 external interfaces to work in
274 # centisecs. This can be automated, but it's 285 # centisecs. This can be automated, but it's a work in progress that still
275 # needs# some fixes. On 2.6 kernels, XFS use 286 # needs# some fixes. On 2.6 kernels, XFS uses USER_HZ instead of HZ for
276 # external interfaces, and that is currently 287 # external interfaces, and that is currently always set to 100. So you don't
277 # need to change this on 2.6. 288 # need to change this on 2.6.
278 #XFS_HZ=100 289 #XFS_HZ=100
279 290
280 # Should the maximum CPU frequency be adjust 291 # Should the maximum CPU frequency be adjusted down while on battery?
281 # Requires CPUFreq to be setup. 292 # Requires CPUFreq to be setup.
282 # See Documentation/admin-guide/pm/cpufreq.r 293 # See Documentation/admin-guide/pm/cpufreq.rst for more info
283 #DO_CPU=0 294 #DO_CPU=0
284 295
285 # When on battery what is the maximum CPU sp 296 # When on battery what is the maximum CPU speed that the system should
286 # use? Legal values are "slowest" for the sl 297 # use? Legal values are "slowest" for the slowest speed that your
287 # CPU is able to operate at, or a value list 298 # CPU is able to operate at, or a value listed in:
288 # /sys/devices/system/cpu/cpu0/cpufreq/scali 299 # /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies
289 # Only applicable if DO_CPU=1. 300 # Only applicable if DO_CPU=1.
290 #CPU_MAXFREQ=slowest 301 #CPU_MAXFREQ=slowest
291 302
292 # Idle timeout for your hard drive (man hdpa 303 # Idle timeout for your hard drive (man hdparm for valid values, -S option)
293 # Default is 2 hours on AC (AC_HD=244) and 2 304 # Default is 2 hours on AC (AC_HD=244) and 20 seconds for battery (BATT_HD=4).
294 #AC_HD=244 305 #AC_HD=244
295 #BATT_HD=4 306 #BATT_HD=4
296 307
297 # The drives for which to adjust the idle ti 308 # The drives for which to adjust the idle timeout. Separate them by a space,
298 # e.g. HD="/dev/hda /dev/hdb". 309 # e.g. HD="/dev/hda /dev/hdb".
299 #HD="/dev/hda" 310 #HD="/dev/hda"
300 311
301 # Set the spindown timeout on a hard drive? 312 # Set the spindown timeout on a hard drive?
302 #DO_HD=1 313 #DO_HD=1
303 314
304 315
305 Control script 316 Control script
306 -------------- 317 --------------
307 318
308 Please note that this control script works for 319 Please note that this control script works for the Linux 2.4 and 2.6 series (thanks
309 to Kiko Piris). 320 to Kiko Piris).
310 321
311 Control script:: 322 Control script::
312 323
313 #!/bin/bash 324 #!/bin/bash
314 325
315 # start or stop laptop_mode, best run by a p 326 # start or stop laptop_mode, best run by a power management daemon when
316 # ac gets connected/disconnected from a lapt 327 # ac gets connected/disconnected from a laptop
317 # 328 #
318 # install as /sbin/laptop_mode 329 # install as /sbin/laptop_mode
319 # 330 #
320 # Contributors to this script: Kiko Piris 331 # Contributors to this script: Kiko Piris
321 # Bart Samwel 332 # Bart Samwel
322 # Micha Feigin 333 # Micha Feigin
323 # Andrew Morton 334 # Andrew Morton
324 # Herve Eychenn 335 # Herve Eychenne
325 # Dax Kelson 336 # Dax Kelson
326 # 337 #
327 # Original Linux 2.4 version by: Jens Axboe 338 # Original Linux 2.4 version by: Jens Axboe
328 339
329 ############################################ 340 #############################################################################
330 341
331 # Source config 342 # Source config
332 if [ -f /etc/default/laptop-mode ] ; then 343 if [ -f /etc/default/laptop-mode ] ; then
333 # Debian 344 # Debian
334 . /etc/default/laptop-mode 345 . /etc/default/laptop-mode
335 elif [ -f /etc/sysconfig/laptop-mode ] ; the 346 elif [ -f /etc/sysconfig/laptop-mode ] ; then
336 # Others 347 # Others
337 . /etc/sysconfig/laptop-mode 348 . /etc/sysconfig/laptop-mode
338 fi 349 fi
339 350
340 # Don't raise an error if the config file is 351 # Don't raise an error if the config file is incomplete
341 # set defaults instead: 352 # set defaults instead:
342 353
343 # Maximum time, in seconds, of hard drive sp 354 # Maximum time, in seconds, of hard drive spindown time that you are
344 # comfortable with. Worst case, it's possibl 355 # comfortable with. Worst case, it's possible that you could lose this
345 # amount of work if your battery fails you w 356 # amount of work if your battery fails you while in laptop mode.
346 MAX_AGE=${MAX_AGE:-'600'} 357 MAX_AGE=${MAX_AGE:-'600'}
347 358
348 # Read-ahead, in kilobytes 359 # Read-ahead, in kilobytes
349 READAHEAD=${READAHEAD:-'4096'} 360 READAHEAD=${READAHEAD:-'4096'}
350 361
351 # Shall we remount journaled fs. with approp 362 # Shall we remount journaled fs. with appropriate commit interval? (1=yes)
352 DO_REMOUNTS=${DO_REMOUNTS:-'1'} 363 DO_REMOUNTS=${DO_REMOUNTS:-'1'}
353 364
354 # And shall we add the "noatime" option to t 365 # And shall we add the "noatime" option to that as well? (1=yes)
355 DO_REMOUNT_NOATIME=${DO_REMOUNT_NOATIME:-'1' 366 DO_REMOUNT_NOATIME=${DO_REMOUNT_NOATIME:-'1'}
356 367
357 # Shall we adjust the idle timeout on a hard 368 # Shall we adjust the idle timeout on a hard drive?
358 DO_HD=${DO_HD:-'1'} 369 DO_HD=${DO_HD:-'1'}
359 370
360 # Adjust idle timeout on which hard drive? 371 # Adjust idle timeout on which hard drive?
361 HD="${HD:-'/dev/hda'}" 372 HD="${HD:-'/dev/hda'}"
362 373
363 # spindown time for HD (hdparm -S values) 374 # spindown time for HD (hdparm -S values)
364 AC_HD=${AC_HD:-'244'} 375 AC_HD=${AC_HD:-'244'}
365 BATT_HD=${BATT_HD:-'4'} 376 BATT_HD=${BATT_HD:-'4'}
366 377
367 # Dirty synchronous ratio. At this percenta 378 # Dirty synchronous ratio. At this percentage of dirty pages the process which
368 # calls write() does its own writeback 379 # calls write() does its own writeback
369 DIRTY_RATIO=${DIRTY_RATIO:-'40'} 380 DIRTY_RATIO=${DIRTY_RATIO:-'40'}
370 381
371 # cpu frequency scaling 382 # cpu frequency scaling
372 # See Documentation/admin-guide/pm/cpufreq.r 383 # See Documentation/admin-guide/pm/cpufreq.rst for more info
373 DO_CPU=${CPU_MANAGE:-'0'} 384 DO_CPU=${CPU_MANAGE:-'0'}
374 CPU_MAXFREQ=${CPU_MAXFREQ:-'slowest'} 385 CPU_MAXFREQ=${CPU_MAXFREQ:-'slowest'}
375 386
376 # 387 #
377 # Allowed dirty background ratio, in percent 388 # Allowed dirty background ratio, in percent. Once DIRTY_RATIO has been
378 # exceeded, the kernel will wake flusher thr 389 # exceeded, the kernel will wake flusher threads which will then reduce the
379 # amount of dirty memory to dirty_background 390 # amount of dirty memory to dirty_background_ratio. Set this nice and low,
380 # so once some writeout has commenced, we do 391 # so once some writeout has commenced, we do a lot of it.
381 # 392 #
382 DIRTY_BACKGROUND_RATIO=${DIRTY_BACKGROUND_RA 393 DIRTY_BACKGROUND_RATIO=${DIRTY_BACKGROUND_RATIO:-'5'}
383 394
384 # kernel default dirty buffer age 395 # kernel default dirty buffer age
385 DEF_AGE=${DEF_AGE:-'30'} 396 DEF_AGE=${DEF_AGE:-'30'}
386 DEF_UPDATE=${DEF_UPDATE:-'5'} 397 DEF_UPDATE=${DEF_UPDATE:-'5'}
387 DEF_DIRTY_BACKGROUND_RATIO=${DEF_DIRTY_BACKG 398 DEF_DIRTY_BACKGROUND_RATIO=${DEF_DIRTY_BACKGROUND_RATIO:-'10'}
388 DEF_DIRTY_RATIO=${DEF_DIRTY_RATIO:-'40'} 399 DEF_DIRTY_RATIO=${DEF_DIRTY_RATIO:-'40'}
389 DEF_XFS_AGE_BUFFER=${DEF_XFS_AGE_BUFFER:-'15 400 DEF_XFS_AGE_BUFFER=${DEF_XFS_AGE_BUFFER:-'15'}
390 DEF_XFS_SYNC_INTERVAL=${DEF_XFS_SYNC_INTERVA 401 DEF_XFS_SYNC_INTERVAL=${DEF_XFS_SYNC_INTERVAL:-'30'}
391 DEF_XFS_BUFD_INTERVAL=${DEF_XFS_BUFD_INTERVA 402 DEF_XFS_BUFD_INTERVAL=${DEF_XFS_BUFD_INTERVAL:-'1'}
392 403
393 # This must be adjusted manually to the valu 404 # This must be adjusted manually to the value of HZ in the running kernel
394 # on 2.4, until the XFS people change their 405 # on 2.4, until the XFS people change their 2.4 external interfaces to work in
395 # centisecs. This can be automated, but it's 406 # centisecs. This can be automated, but it's a work in progress that still needs
396 # some fixes. On 2.6 kernels, XFS uses USER_ 407 # some fixes. On 2.6 kernels, XFS uses USER_HZ instead of HZ for external
397 # interfaces, and that is currently always s 408 # interfaces, and that is currently always set to 100. So you don't need to
398 # change this on 2.6. 409 # change this on 2.6.
399 XFS_HZ=${XFS_HZ:-'100'} 410 XFS_HZ=${XFS_HZ:-'100'}
400 411
401 ############################################ 412 #############################################################################
402 413
403 KLEVEL="$(uname -r | 414 KLEVEL="$(uname -r |
404 { 415 {
405 IFS='.' read a b c 416 IFS='.' read a b c
406 echo $a.$b 417 echo $a.$b
407 } 418 }
408 )" 419 )"
409 case "$KLEVEL" in 420 case "$KLEVEL" in
410 "2.4"|"2.6") 421 "2.4"|"2.6")
411 ;; 422 ;;
412 *) 423 *)
413 echo "Unhandled kernel version 424 echo "Unhandled kernel version: $KLEVEL ('uname -r' = '$(uname -r)')" >&2
414 exit 1 425 exit 1
415 ;; 426 ;;
416 esac 427 esac
417 428
418 if [ ! -e /proc/sys/vm/laptop_mode ] ; then 429 if [ ! -e /proc/sys/vm/laptop_mode ] ; then
419 echo "Kernel is not patched with lapto 430 echo "Kernel is not patched with laptop_mode patch." >&2
420 exit 1 431 exit 1
421 fi 432 fi
422 433
423 if [ ! -w /proc/sys/vm/laptop_mode ] ; then 434 if [ ! -w /proc/sys/vm/laptop_mode ] ; then
424 echo "You do not have enough privilege 435 echo "You do not have enough privileges to enable laptop_mode." >&2
425 exit 1 436 exit 1
426 fi 437 fi
427 438
428 # Remove an option (the first parameter) of 439 # Remove an option (the first parameter) of the form option=<number> from
429 # a mount options string (the rest of the pa 440 # a mount options string (the rest of the parameters).
430 parse_mount_opts () { 441 parse_mount_opts () {
431 OPT="$1" 442 OPT="$1"
432 shift 443 shift
433 echo ",$*," | sed \ 444 echo ",$*," | sed \
434 -e 's/,'"$OPT"'=[0-9]*,/,/g' \ 445 -e 's/,'"$OPT"'=[0-9]*,/,/g' \
435 -e 's/,,*/,/g' \ 446 -e 's/,,*/,/g' \
436 -e 's/^,//' \ 447 -e 's/^,//' \
437 -e 's/,$//' 448 -e 's/,$//'
438 } 449 }
439 450
440 # Remove an option (the first parameter) wit 451 # Remove an option (the first parameter) without any arguments from
441 # a mount option string (the rest of the par 452 # a mount option string (the rest of the parameters).
442 parse_nonumber_mount_opts () { 453 parse_nonumber_mount_opts () {
443 OPT="$1" 454 OPT="$1"
444 shift 455 shift
445 echo ",$*," | sed \ 456 echo ",$*," | sed \
446 -e 's/,'"$OPT"',/,/g' \ 457 -e 's/,'"$OPT"',/,/g' \
447 -e 's/,,*/,/g' \ 458 -e 's/,,*/,/g' \
448 -e 's/^,//' \ 459 -e 's/^,//' \
449 -e 's/,$//' 460 -e 's/,$//'
450 } 461 }
451 462
452 # Find out the state of a yes/no option (e.g 463 # Find out the state of a yes/no option (e.g. "atime"/"noatime") in
453 # fstab for a given filesystem, and use this 464 # fstab for a given filesystem, and use this state to replace the
454 # value of the option in another mount optio 465 # value of the option in another mount options string. The device
455 # is the first argument, the option name the 466 # is the first argument, the option name the second, and the default
456 # value the third. The remainder is the moun 467 # value the third. The remainder is the mount options string.
457 # 468 #
458 # Example: 469 # Example:
459 # parse_yesno_opts_wfstab /dev/hda1 atime at 470 # parse_yesno_opts_wfstab /dev/hda1 atime atime defaults,noatime
460 # 471 #
461 # If fstab contains, say, "rw" for this file 472 # If fstab contains, say, "rw" for this filesystem, then the result
462 # will be "defaults,atime". 473 # will be "defaults,atime".
463 parse_yesno_opts_wfstab () { 474 parse_yesno_opts_wfstab () {
464 L_DEV="$1" 475 L_DEV="$1"
465 OPT="$2" 476 OPT="$2"
466 DEF_OPT="$3" 477 DEF_OPT="$3"
467 shift 3 478 shift 3
468 L_OPTS="$*" 479 L_OPTS="$*"
469 PARSEDOPTS1="$(parse_nonumber_mount_op 480 PARSEDOPTS1="$(parse_nonumber_mount_opts $OPT $L_OPTS)"
470 PARSEDOPTS1="$(parse_nonumber_mount_op 481 PARSEDOPTS1="$(parse_nonumber_mount_opts no$OPT $PARSEDOPTS1)"
471 # Watch for a default atime in fstab 482 # Watch for a default atime in fstab
472 FSTAB_OPTS="$(awk '$1 == "'$L_DEV'" { 483 FSTAB_OPTS="$(awk '$1 == "'$L_DEV'" { print $4 }' /etc/fstab)"
473 if echo "$FSTAB_OPTS" | grep "$OPT" > 484 if echo "$FSTAB_OPTS" | grep "$OPT" > /dev/null ; then
474 # option specified in fstab: e 485 # option specified in fstab: extract the value and use it
475 if echo "$FSTAB_OPTS" | grep " 486 if echo "$FSTAB_OPTS" | grep "no$OPT" > /dev/null ; then
476 echo "$PARSEDOPTS1,no$ 487 echo "$PARSEDOPTS1,no$OPT"
477 else 488 else
478 # no$OPT not found -- 489 # no$OPT not found -- so we must have $OPT.
479 echo "$PARSEDOPTS1,$OP 490 echo "$PARSEDOPTS1,$OPT"
480 fi 491 fi
481 else 492 else
482 # option not specified in fsta 493 # option not specified in fstab -- choose the default.
483 echo "$PARSEDOPTS1,$DEF_OPT" 494 echo "$PARSEDOPTS1,$DEF_OPT"
484 fi 495 fi
485 } 496 }
486 497
487 # Find out the state of a numbered option (e 498 # Find out the state of a numbered option (e.g. "commit=NNN") in
488 # fstab for a given filesystem, and use this 499 # fstab for a given filesystem, and use this state to replace the
489 # value of the option in another mount optio 500 # value of the option in another mount options string. The device
490 # is the first argument, and the option name 501 # is the first argument, and the option name the second. The
491 # remainder is the mount options string in w 502 # remainder is the mount options string in which the replacement
492 # must be done. 503 # must be done.
493 # 504 #
494 # Example: 505 # Example:
495 # parse_mount_opts_wfstab /dev/hda1 commit d 506 # parse_mount_opts_wfstab /dev/hda1 commit defaults,commit=7
496 # 507 #
497 # If fstab contains, say, "commit=3,rw" for 508 # If fstab contains, say, "commit=3,rw" for this filesystem, then the
498 # result will be "rw,commit=3". 509 # result will be "rw,commit=3".
499 parse_mount_opts_wfstab () { 510 parse_mount_opts_wfstab () {
500 L_DEV="$1" 511 L_DEV="$1"
501 OPT="$2" 512 OPT="$2"
502 shift 2 513 shift 2
503 L_OPTS="$*" 514 L_OPTS="$*"
504 PARSEDOPTS1="$(parse_mount_opts $OPT $ 515 PARSEDOPTS1="$(parse_mount_opts $OPT $L_OPTS)"
505 # Watch for a default commit in fstab 516 # Watch for a default commit in fstab
506 FSTAB_OPTS="$(awk '$1 == "'$L_DEV'" { 517 FSTAB_OPTS="$(awk '$1 == "'$L_DEV'" { print $4 }' /etc/fstab)"
507 if echo "$FSTAB_OPTS" | grep "$OPT=" > 518 if echo "$FSTAB_OPTS" | grep "$OPT=" > /dev/null ; then
508 # option specified in fstab: e 519 # option specified in fstab: extract the value, and use it
509 echo -n "$PARSEDOPTS1,$OPT=" 520 echo -n "$PARSEDOPTS1,$OPT="
510 echo ",$FSTAB_OPTS," | sed \ 521 echo ",$FSTAB_OPTS," | sed \
511 -e 's/.*,'"$OPT"'=//' \ 522 -e 's/.*,'"$OPT"'=//' \
512 -e 's/,.*//' 523 -e 's/,.*//'
513 else 524 else
514 # option not specified in fsta 525 # option not specified in fstab: set it to 0
515 echo "$PARSEDOPTS1,$OPT=0" 526 echo "$PARSEDOPTS1,$OPT=0"
516 fi 527 fi
517 } 528 }
518 529
519 deduce_fstype () { 530 deduce_fstype () {
520 MP="$1" 531 MP="$1"
521 # My root filesystem unfortunately has 532 # My root filesystem unfortunately has
522 # type "unknown" in /etc/mtab. If we e 533 # type "unknown" in /etc/mtab. If we encounter
523 # "unknown", we try to get the type fr 534 # "unknown", we try to get the type from fstab.
524 cat /etc/fstab | 535 cat /etc/fstab |
525 grep -v '^#' | 536 grep -v '^#' |
526 while read FSTAB_DEV FSTAB_MP FSTAB_FS 537 while read FSTAB_DEV FSTAB_MP FSTAB_FST FSTAB_OPTS FSTAB_DUMP FSTAB_DUMP ; do
527 if [ "$FSTAB_MP" = "$MP" ]; th 538 if [ "$FSTAB_MP" = "$MP" ]; then
528 echo $FSTAB_FST 539 echo $FSTAB_FST
529 exit 0 540 exit 0
530 fi 541 fi
531 done 542 done
532 } 543 }
533 544
534 if [ $DO_REMOUNT_NOATIME -eq 1 ] ; then 545 if [ $DO_REMOUNT_NOATIME -eq 1 ] ; then
535 NOATIME_OPT=",noatime" 546 NOATIME_OPT=",noatime"
536 fi 547 fi
537 548
538 case "$1" in 549 case "$1" in
539 start) 550 start)
540 AGE=$((100*$MAX_AGE)) 551 AGE=$((100*$MAX_AGE))
541 XFS_AGE=$(($XFS_HZ*$MAX_AGE)) 552 XFS_AGE=$(($XFS_HZ*$MAX_AGE))
542 echo -n "Starting laptop_mode" 553 echo -n "Starting laptop_mode"
543 554
544 if [ -d /proc/sys/vm/pagebuf ] 555 if [ -d /proc/sys/vm/pagebuf ] ; then
545 # (For 2.4 and early 2 556 # (For 2.4 and early 2.6.)
546 # This only needs to b 557 # This only needs to be set, not reset -- it is only used when
547 # laptop mode is enabl 558 # laptop mode is enabled.
548 echo $XFS_AGE > /proc/ 559 echo $XFS_AGE > /proc/sys/vm/pagebuf/lm_flush_age
549 echo $XFS_AGE > /proc/ 560 echo $XFS_AGE > /proc/sys/fs/xfs/lm_sync_interval
550 elif [ -f /proc/sys/fs/xfs/lm_ 561 elif [ -f /proc/sys/fs/xfs/lm_age_buffer ] ; then
551 # (A couple of early 2 562 # (A couple of early 2.6 laptop mode patches had these.)
552 # The same goes for th 563 # The same goes for these.
553 echo $XFS_AGE > /proc/ 564 echo $XFS_AGE > /proc/sys/fs/xfs/lm_age_buffer
554 echo $XFS_AGE > /proc/ 565 echo $XFS_AGE > /proc/sys/fs/xfs/lm_sync_interval
555 elif [ -f /proc/sys/fs/xfs/age 566 elif [ -f /proc/sys/fs/xfs/age_buffer ] ; then
556 # (2.6.6) 567 # (2.6.6)
557 # But not for these -- 568 # But not for these -- they are also used in normal
558 # operation. 569 # operation.
559 echo $XFS_AGE > /proc/ 570 echo $XFS_AGE > /proc/sys/fs/xfs/age_buffer
560 echo $XFS_AGE > /proc/ 571 echo $XFS_AGE > /proc/sys/fs/xfs/sync_interval
561 elif [ -f /proc/sys/fs/xfs/age 572 elif [ -f /proc/sys/fs/xfs/age_buffer_centisecs ] ; then
562 # (2.6.7 upwards) 573 # (2.6.7 upwards)
563 # And not for these ei 574 # And not for these either. These are in centisecs,
564 # not USER_HZ, so we h 575 # not USER_HZ, so we have to use $AGE, not $XFS_AGE.
565 echo $AGE > /proc/sys/ 576 echo $AGE > /proc/sys/fs/xfs/age_buffer_centisecs
566 echo $AGE > /proc/sys/ 577 echo $AGE > /proc/sys/fs/xfs/xfssyncd_centisecs
567 echo 3000 > /proc/sys/ 578 echo 3000 > /proc/sys/fs/xfs/xfsbufd_centisecs
568 fi 579 fi
569 580
570 case "$KLEVEL" in 581 case "$KLEVEL" in
571 "2.4") 582 "2.4")
572 echo 1 583 echo 1 > /proc/sys/vm/laptop_mode
573 echo "30 500 0 584 echo "30 500 0 0 $AGE $AGE 60 20 0" > /proc/sys/vm/bdflush
574 ;; 585 ;;
575 "2.6") 586 "2.6")
576 echo 5 587 echo 5 > /proc/sys/vm/laptop_mode
577 echo "$AGE" 588 echo "$AGE" > /proc/sys/vm/dirty_writeback_centisecs
578 echo "$AGE" 589 echo "$AGE" > /proc/sys/vm/dirty_expire_centisecs
579 echo "$DIRTY_R 590 echo "$DIRTY_RATIO" > /proc/sys/vm/dirty_ratio
580 echo "$DIRTY_B 591 echo "$DIRTY_BACKGROUND_RATIO" > /proc/sys/vm/dirty_background_ratio
581 ;; 592 ;;
582 esac 593 esac
583 if [ $DO_REMOUNTS -eq 1 ]; the 594 if [ $DO_REMOUNTS -eq 1 ]; then
584 cat /etc/mtab | while 595 cat /etc/mtab | while read DEV MP FST OPTS DUMP PASS ; do
585 PARSEDOPTS="$( 596 PARSEDOPTS="$(parse_mount_opts "$OPTS")"
586 if [ "$FST" = 597 if [ "$FST" = 'unknown' ]; then
587 FST=$( 598 FST=$(deduce_fstype $MP)
588 fi 599 fi
589 case "$FST" in 600 case "$FST" in
590 "ext3" 601 "ext3"|"reiserfs")
591 602 PARSEDOPTS="$(parse_mount_opts commit "$OPTS")"
592 603 mount $DEV -t $FST $MP -o remount,$PARSEDOPTS,commit=$MAX_AGE$NOATIME_OPT
593 604 ;;
594 "xfs") 605 "xfs")
595 606 mount $DEV -t $FST $MP -o remount,$OPTS$NOATIME_OPT
596 607 ;;
597 esac 608 esac
598 if [ -b $DEV ] 609 if [ -b $DEV ] ; then
599 blockd 610 blockdev --setra $(($READAHEAD * 2)) $DEV
600 fi 611 fi
601 done 612 done
602 fi 613 fi
603 if [ $DO_HD -eq 1 ] ; then 614 if [ $DO_HD -eq 1 ] ; then
604 for THISHD in $HD ; do 615 for THISHD in $HD ; do
605 /sbin/hdparm - 616 /sbin/hdparm -S $BATT_HD $THISHD > /dev/null 2>&1
606 /sbin/hdparm - 617 /sbin/hdparm -B 1 $THISHD > /dev/null 2>&1
607 done 618 done
608 fi 619 fi
609 if [ $DO_CPU -eq 1 -a -e /sys/ 620 if [ $DO_CPU -eq 1 -a -e /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_min_freq ]; then
610 if [ $CPU_MAXFREQ = 's 621 if [ $CPU_MAXFREQ = 'slowest' ]; then
611 CPU_MAXFREQ=`c 622 CPU_MAXFREQ=`cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_min_freq`
612 fi 623 fi
613 echo $CPU_MAXFREQ > /s 624 echo $CPU_MAXFREQ > /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq
614 fi 625 fi
615 echo "." 626 echo "."
616 ;; 627 ;;
617 stop) 628 stop)
618 U_AGE=$((100*$DEF_UPDATE)) 629 U_AGE=$((100*$DEF_UPDATE))
619 B_AGE=$((100*$DEF_AGE)) 630 B_AGE=$((100*$DEF_AGE))
620 echo -n "Stopping laptop_mode" 631 echo -n "Stopping laptop_mode"
621 echo 0 > /proc/sys/vm/laptop_m 632 echo 0 > /proc/sys/vm/laptop_mode
622 if [ -f /proc/sys/fs/xfs/age_b 633 if [ -f /proc/sys/fs/xfs/age_buffer -a ! -f /proc/sys/fs/xfs/lm_age_buffer ] ; then
623 # These need to be res 634 # These need to be restored, if there are no lm_*.
624 echo $(($XFS_HZ*$DEF_X 635 echo $(($XFS_HZ*$DEF_XFS_AGE_BUFFER)) > /proc/sys/fs/xfs/age_buffer
625 echo $(($XFS_HZ*$DEF_X 636 echo $(($XFS_HZ*$DEF_XFS_SYNC_INTERVAL)) > /proc/sys/fs/xfs/sync_interval
626 elif [ -f /proc/sys/fs/xfs/age 637 elif [ -f /proc/sys/fs/xfs/age_buffer_centisecs ] ; then
627 # These need to be res 638 # These need to be restored as well.
628 echo $((100*$DEF_XFS_A 639 echo $((100*$DEF_XFS_AGE_BUFFER)) > /proc/sys/fs/xfs/age_buffer_centisecs
629 echo $((100*$DEF_XFS_S 640 echo $((100*$DEF_XFS_SYNC_INTERVAL)) > /proc/sys/fs/xfs/xfssyncd_centisecs
630 echo $((100*$DEF_XFS_B 641 echo $((100*$DEF_XFS_BUFD_INTERVAL)) > /proc/sys/fs/xfs/xfsbufd_centisecs
631 fi 642 fi
632 case "$KLEVEL" in 643 case "$KLEVEL" in
633 "2.4") 644 "2.4")
634 echo "30 500 0 645 echo "30 500 0 0 $U_AGE $B_AGE 60 20 0" > /proc/sys/vm/bdflush
635 ;; 646 ;;
636 "2.6") 647 "2.6")
637 echo "$U_AGE" 648 echo "$U_AGE" > /proc/sys/vm/dirty_writeback_centisecs
638 echo "$B_AGE" 649 echo "$B_AGE" > /proc/sys/vm/dirty_expire_centisecs
639 echo "$DEF_DIR 650 echo "$DEF_DIRTY_RATIO" > /proc/sys/vm/dirty_ratio
640 echo "$DEF_DIR 651 echo "$DEF_DIRTY_BACKGROUND_RATIO" > /proc/sys/vm/dirty_background_ratio
641 ;; 652 ;;
642 esac 653 esac
643 if [ $DO_REMOUNTS -eq 1 ] ; th 654 if [ $DO_REMOUNTS -eq 1 ] ; then
644 cat /etc/mtab | while 655 cat /etc/mtab | while read DEV MP FST OPTS DUMP PASS ; do
645 # Reset commit 656 # Reset commit and atime options to defaults.
646 if [ "$FST" = 657 if [ "$FST" = 'unknown' ]; then
647 FST=$( 658 FST=$(deduce_fstype $MP)
648 fi 659 fi
649 case "$FST" in 660 case "$FST" in
650 "ext3" 661 "ext3"|"reiserfs")
651 662 PARSEDOPTS="$(parse_mount_opts_wfstab $DEV commit $OPTS)"
652 663 PARSEDOPTS="$(parse_yesno_opts_wfstab $DEV atime atime $PARSEDOPTS)"
653 664 mount $DEV -t $FST $MP -o remount,$PARSEDOPTS
654 665 ;;
655 "xfs") 666 "xfs")
656 667 PARSEDOPTS="$(parse_yesno_opts_wfstab $DEV atime atime $OPTS)"
657 668 mount $DEV -t $FST $MP -o remount,$PARSEDOPTS
658 669 ;;
659 esac 670 esac
660 if [ -b $DEV ] 671 if [ -b $DEV ] ; then
661 blockd 672 blockdev --setra 256 $DEV
662 fi 673 fi
663 done 674 done
664 fi 675 fi
665 if [ $DO_HD -eq 1 ] ; then 676 if [ $DO_HD -eq 1 ] ; then
666 for THISHD in $HD ; do 677 for THISHD in $HD ; do
667 /sbin/hdparm - 678 /sbin/hdparm -S $AC_HD $THISHD > /dev/null 2>&1
668 /sbin/hdparm - 679 /sbin/hdparm -B 255 $THISHD > /dev/null 2>&1
669 done 680 done
670 fi 681 fi
671 if [ $DO_CPU -eq 1 -a -e /sys/ 682 if [ $DO_CPU -eq 1 -a -e /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_min_freq ]; then
672 echo `cat /sys/devices 683 echo `cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq` > /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq
673 fi 684 fi
674 echo "." 685 echo "."
675 ;; 686 ;;
676 *) 687 *)
677 echo "Usage: $0 {start|stop}" 688 echo "Usage: $0 {start|stop}" 2>&1
678 exit 1 689 exit 1
679 ;; 690 ;;
680 691
681 esac 692 esac
682 693
683 exit 0 694 exit 0
684 695
685 696
686 ACPI integration 697 ACPI integration
687 ---------------- 698 ----------------
688 699
689 Dax Kelson submitted this so that the ACPI acp 700 Dax Kelson submitted this so that the ACPI acpid daemon will
690 kick off the laptop_mode script and run hdparm 701 kick off the laptop_mode script and run hdparm. The part that
691 automatically disables laptop mode when the ba 702 automatically disables laptop mode when the battery is low was
692 written by Jan Topinski. 703 written by Jan Topinski.
693 704
694 /etc/acpi/events/ac_adapter:: 705 /etc/acpi/events/ac_adapter::
695 706
696 event=ac_adapter 707 event=ac_adapter
697 action=/etc/acpi/actions/ac.sh %e 708 action=/etc/acpi/actions/ac.sh %e
698 709
699 /etc/acpi/events/battery:: 710 /etc/acpi/events/battery::
700 711
701 event=battery.* 712 event=battery.*
702 action=/etc/acpi/actions/battery.sh %e 713 action=/etc/acpi/actions/battery.sh %e
703 714
704 /etc/acpi/actions/ac.sh:: 715 /etc/acpi/actions/ac.sh::
705 716
706 #!/bin/bash 717 #!/bin/bash
707 718
708 # ac on/offline event handler 719 # ac on/offline event handler
709 720
710 status=`awk '/^state: / { print $2 }' /proc/ 721 status=`awk '/^state: / { print $2 }' /proc/acpi/ac_adapter/$2/state`
711 722
712 case $status in 723 case $status in
713 "on-line") 724 "on-line")
714 /sbin/laptop_mode stop 725 /sbin/laptop_mode stop
715 exit 0 726 exit 0
716 ;; 727 ;;
717 "off-line") 728 "off-line")
718 /sbin/laptop_mode start 729 /sbin/laptop_mode start
719 exit 0 730 exit 0
720 ;; 731 ;;
721 esac 732 esac
722 733
723 734
724 /etc/acpi/actions/battery.sh:: 735 /etc/acpi/actions/battery.sh::
725 736
726 #! /bin/bash 737 #! /bin/bash
727 738
728 # Automatically disable laptop mode when the 739 # Automatically disable laptop mode when the battery almost runs out.
729 740
730 BATT_INFO=/proc/acpi/battery/$2/state 741 BATT_INFO=/proc/acpi/battery/$2/state
731 742
732 if [[ -f /proc/sys/vm/laptop_mode ]] 743 if [[ -f /proc/sys/vm/laptop_mode ]]
733 then 744 then
734 LM=`cat /proc/sys/vm/laptop_mode` 745 LM=`cat /proc/sys/vm/laptop_mode`
735 if [[ $LM -gt 0 ]] 746 if [[ $LM -gt 0 ]]
736 then 747 then
737 if [[ -f $BATT_INFO ]] 748 if [[ -f $BATT_INFO ]]
738 then 749 then
739 # Source the config file only now th 750 # Source the config file only now that we know we need
740 if [ -f /etc/default/laptop-mode ] ; 751 if [ -f /etc/default/laptop-mode ] ; then
741 # Debian 752 # Debian
742 . /etc/default/laptop-mode 753 . /etc/default/laptop-mode
743 elif [ -f /etc/sysconfig/laptop-mode 754 elif [ -f /etc/sysconfig/laptop-mode ] ; then
744 # Others 755 # Others
745 . /etc/sysconfig/laptop-mode 756 . /etc/sysconfig/laptop-mode
746 fi 757 fi
747 MINIMUM_BATTERY_MINUTES=${MINIMUM_BA 758 MINIMUM_BATTERY_MINUTES=${MINIMUM_BATTERY_MINUTES:-'10'}
748 759
749 ACTION="`cat $BATT_INFO | grep charg 760 ACTION="`cat $BATT_INFO | grep charging | cut -c 26-`"
750 if [[ ACTION -eq "discharging" ]] 761 if [[ ACTION -eq "discharging" ]]
751 then 762 then
752 PRESENT_RATE=`cat $BATT_INFO | gr 763 PRESENT_RATE=`cat $BATT_INFO | grep "present rate:" | sed "s/.* \([0-9][0-9]* \).*/\1/" `
753 REMAINING=`cat $BATT_INFO | grep 764 REMAINING=`cat $BATT_INFO | grep "remaining capacity:" | sed "s/.* \([0-9][0-9]* \).*/\1/" `
754 fi 765 fi
755 if (($REMAINING * 60 / $PRESENT_RATE 766 if (($REMAINING * 60 / $PRESENT_RATE < $MINIMUM_BATTERY_MINUTES))
756 then 767 then
757 /sbin/laptop_mode stop 768 /sbin/laptop_mode stop
758 fi 769 fi
759 else 770 else
760 logger -p daemon.warning "You are usi 771 logger -p daemon.warning "You are using laptop mode and your battery interface $BATT_INFO is missing. This may lead to loss of data when the battery runs out. Check kernel ACPI support and /proc/acpi/battery folder, and edit /etc/acpi/battery.sh to set BATT_INFO to the correct path."
761 fi 772 fi
762 fi 773 fi
763 fi 774 fi
764 775
765 776
766 Monitoring tool 777 Monitoring tool
767 --------------- 778 ---------------
768 779
769 Bartek Kania submitted this, it can be used to 780 Bartek Kania submitted this, it can be used to measure how much time your disk
770 spends spun up/down. See tools/laptop/dslm/ds 781 spends spun up/down. See tools/laptop/dslm/dslm.c
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