1 What: /sys/fs/pstore/...
2 What: /dev/pstore/...
3 Date: March 2011
4 KernelVersion: 2.6.39
5 Contact: tony.luck@intel.com
6 Description: Generic interface to platform
7
8 Platforms that provide a mecha
9 across system reboots can regi
10 provide a generic interface to
11 the dying moments. In the cas
12 of the console log is captured
13 data can also be saved::
14
15 # mount -t pstore -o kmsg_
16
17 $ ls -l /sys/fs/pstore/
18 total 0
19 -r--r--r-- 1 root root 789
20
21 Different users of this interf
22 filename prefixes. Currently
23
24 - "dmesg" - saved console log
25 - "mce" - architecture depen
26
27 Once the information in a file
28 the file will signal to the un
29 device that it can reclaim the
30
31 $ rm /sys/fs/pstore/dmesg-
32
33 The expectation is that all fi
34 will be saved elsewhere and er
35 soon after boot to free up spa
36 catastrophe.
37
38 The 'kmsg_bytes' mount option
39 data saved on each oops/panic.
40 multiple) files based on the r
41 persistent storage until at le
42 Default is 10 Kbytes.
43
44 Pstore only supports one backe
45 backends are available, the pr
46 set by passing the pstore.back
47 boot time.
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