1What:           /sys/module/xen_blkback/parameters/max_buffer_pages
2Date:           March 2013
3KernelVersion:  3.11
4Contact:        Roger Pau Monn�� <roger.pau@citrix.com>
5Description:
6                Maximum number of free pages to keep in each block
7                backend buffer.
8
9What:           /sys/module/xen_blkback/parameters/max_persistent_grants
10Date:           March 2013
11KernelVersion:  3.11
12Contact:        Roger Pau Monn�� <roger.pau@citrix.com>
13Description:
14                Maximum number of grants to map persistently in
15                blkback. If the frontend tries to use more than
16                max_persistent_grants, the LRU kicks in and starts
17                removing 5% of max_persistent_grants every 100ms.
18