1 What: /sys/module/xen_blkback/parame 1 What: /sys/module/xen_blkback/parameters/max_buffer_pages
2 Date: March 2013 2 Date: March 2013
3 KernelVersion: 3.11 3 KernelVersion: 3.11
4 Contact: Roger Pau Monné <roger.pau@cit 4 Contact: Roger Pau Monné <roger.pau@citrix.com>
5 Description: 5 Description:
6 Maximum number of free pages t 6 Maximum number of free pages to keep in each block
7 backend buffer. 7 backend buffer.
8 8
9 What: /sys/module/xen_blkback/parame 9 What: /sys/module/xen_blkback/parameters/max_persistent_grants
10 Date: March 2013 10 Date: March 2013
11 KernelVersion: 3.11 11 KernelVersion: 3.11
12 Contact: Roger Pau Monné <roger.pau@cit 12 Contact: Roger Pau Monné <roger.pau@citrix.com>
13 Description: 13 Description:
14 Maximum number of grants to ma 14 Maximum number of grants to map persistently in
15 blkback. If the frontend tries 15 blkback. If the frontend tries to use more than
16 max_persistent_grants, the LRU 16 max_persistent_grants, the LRU kicks in and starts
17 removing 5% of max_persistent_ 17 removing 5% of max_persistent_grants every 100ms.
18 <<
19 What: /sys/module/xen_blkback/parame <<
20 Date: August 2018 <<
21 KernelVersion: 4.19 <<
22 Contact: Roger Pau Monné <roger.pau@cit <<
23 Description: <<
24 How long a persistent grant is <<
25 allocated without being in use <<
26 seconds, 0 means indefinitely <<
27 The default is 60 seconds. <<
28 <<
29 What: /sys/module/xen_blkback/parame <<
30 Date: December 2019 <<
31 KernelVersion: 5.6 <<
32 Contact: Maximilian Heyne <mheyne@amazon <<
33 Description: <<
34 When memory pressure is report <<
35 controls the duration in milli <<
36 cache any page not backed by a <<
37 The default is 10ms. <<
38 <<
39 What: /sys/module/xen_blkback/parame <<
40 Date: September 2020 <<
41 KernelVersion: 5.10 <<
42 Contact: Maximilian Heyne <mheyne@amazon <<
43 Description: <<
44 Whether to enable the persiste <<
45 that this option only takes ef <<
46 The default is Y (enable). <<
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