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Based on kernel version 3.13. Page generated on 2014-01-20 22:00 EST.

1	What:           /sys/module/xen_blkback/parameters/max_buffer_pages
2	Date:           March 2013
3	KernelVersion:  3.11
4	Contact:        Roger Pau Monné <roger.pau@citrix.com>
5	Description:
6	                Maximum number of free pages to keep in each block
7	                backend buffer.
8	
9	What:           /sys/module/xen_blkback/parameters/max_persistent_grants
10	Date:           March 2013
11	KernelVersion:  3.11
12	Contact:        Roger Pau Monné <roger.pau@citrix.com>
13	Description:
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.
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