dm thin: split discards on block boundary

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This patch sets the variable "ti->split_discard_requests" for the dm thin
target so that device mapper core splits discard requests on a block
boundary.

Consequently, a discard request that spans multiple blocks is never sent
to dm-thin. The patch also removes some code in process_discard that
deals with discards that span multiple blocks.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>

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Mikulas Patocka 2012-07-27 15:08:03 +01:00 • committed by Alasdair G Kergon

parent 7acf0277ce

commit 4929630901

1 changed files with 7 additions and 9 deletions

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drivers/md/dm-thin.c

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