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dm thin: avoid unnecessarily breaking sharing for flushes
authorJoe Thornber <ejt@redhat.com>
Fri, 27 Jul 2012 14:08:06 +0000 (15:08 +0100)
committerAlasdair G Kergon <agk@redhat.com>
Fri, 27 Jul 2012 14:08:06 +0000 (15:08 +0100)
There's no need to break sharing, triggering a copy, for a write that has no
data (i.e. a flush).

Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>

No differences found
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