dm cache: only use overwrite optimisation for promotion when in writeback mode

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commit f29a3147e2 upstream.

Overwrite causes the cache block and origin blocks to diverge, which
is only allowed in writeback mode.

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 2014-11-27 12:21:08 +00:00 • committed by Luis Henriques

parent 4fc2985bdd

commit 23c115ebdf

1 changed files with 2 additions and 1 deletions

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drivers/md/dm-cache-target.c

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