dm thin: grab a virtual cell before looking up the mapping

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commit c822ed967c upstream.

Avoids normal IO racing with discard.

Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>

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Joe Thornber 2014-10-10 09:41:09 +01:00 • committed by Luis Henriques

parent 21ddb33721

commit 67d30efbcc

1 changed files with 12 additions and 4 deletions

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drivers/md/dm-thin.c

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