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Commit aac8a70d authored by SeongJae Park's avatar SeongJae Park Committed by Boris Ostrovsky
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xen-blkback: add a parameter for disabling of persistent grants

Persistent grants feature provides high scalability.  On some small
systems, however, it could incur data copy overheads[1] and thus it is
required to be disabled.  But, there is no option to disable it.  For
the reason, this commit adds a module parameter for disabling of the
feature.

[1] https://wiki.xen.org/wiki/Xen_4.3_Block_Protocol_Scalability



Signed-off-by: default avatarAnthony Liguori <aliguori@amazon.com>
Signed-off-by: default avatarSeongJae Park <sjpark@amazon.de>
Reviewed-by: default avatarJuergen Gross <jgross@suse.com>
Acked-by: default avatarRoger Pau Monné <roger.pau@citrix.com>
Link: https://lore.kernel.org/r/20200923061841.20531-2-sjpark@amazon.com


Signed-off-by: default avatarBoris Ostrovsky <boris.ostrovsky@oracle.com>
parent 5f7f7740
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