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Commit 74a85247 authored by SeongJae Park's avatar SeongJae Park Committed by Boris Ostrovsky
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xen-blkfront: 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.  It can be disabled from blkback side using a
module parameter, 'feature_persistent'.  But, it is impossible from
blkfront side.  For the reason, this commit adds a blkfront module
parameter for disabling of the feature.

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



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/20200923061841.20531-3-sjpark@amazon.com


Signed-off-by: default avatarBoris Ostrovsky <boris.ostrovsky@oracle.com>
parent aac8a70d
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