Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) What:           /sys/module/xen_blkback/parameters/max_buffer_pages
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) Date:           March 2013
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3) KernelVersion:  3.11
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) Contact:        Roger Pau Monné <roger.pau@citrix.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) Description:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)                 Maximum number of free pages to keep in each block
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7)                 backend buffer.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) What:           /sys/module/xen_blkback/parameters/max_persistent_grants
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) Date:           March 2013
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) KernelVersion:  3.11
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) Contact:        Roger Pau Monné <roger.pau@citrix.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) Description:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)                 Maximum number of grants to map persistently in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)                 blkback. If the frontend tries to use more than
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)                 max_persistent_grants, the LRU kicks in and starts
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)                 removing 5% of max_persistent_grants every 100ms.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) What:           /sys/module/xen_blkback/parameters/persistent_grant_unused_seconds
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) Date:           August 2018
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) KernelVersion:  4.19
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) Contact:        Roger Pau Monné <roger.pau@citrix.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) Description:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)                 How long a persistent grant is allowed to remain
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)                 allocated without being in use. The time is in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)                 seconds, 0 means indefinitely long.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)                 The default is 60 seconds.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) What:           /sys/module/xen_blkback/parameters/buffer_squeeze_duration_ms
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) Date:           December 2019
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) KernelVersion:  5.6
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) Contact:        SeongJae Park <sjpark@amazon.de>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) Description:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)                 When memory pressure is reported to blkback this option
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)                 controls the duration in milliseconds that blkback will not
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)                 cache any page not backed by a grant mapping.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)                 The default is 10ms.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) What:           /sys/module/xen_blkback/parameters/feature_persistent
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) Date:           September 2020
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) KernelVersion:  5.10
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) Contact:        SeongJae Park <sjpark@amazon.de>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) Description:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)                 Whether to enable the persistent grants feature or not.  Note
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)                 that this option only takes effect on newly created backends.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)                 The default is Y (enable).