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block/io: Merge discard request alignments 

Signed-off-by: Akihiko Odaki <akihiko.odaki@gmail.com>
Message-id: 20210705130458.97642-3-akihiko.odaki@gmail.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Akihiko Odaki 2021-07-05 22:04:58 +09:00 committed by Stefan Hajnoczi
parent 12a521b56d
commit 9f460c64e1
1 changed files with 2 additions and 0 deletions
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block/io.c
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@ -125,6 +125,8 @@ void bdrv_parent_drained_begin_single(BdrvChild *c, bool poll)
static void bdrv_merge_limits(BlockLimits *dst, const BlockLimits *src)
{
dst->pdiscard_alignment = MAX(dst->pdiscard_alignment,
src->pdiscard_alignment);
dst->opt_transfer = MAX(dst->opt_transfer, src->opt_transfer);
dst->max_transfer = MIN_NON_ZERO(dst->max_transfer, src->max_transfer);
dst->max_hw_transfer = MIN_NON_ZERO(dst->max_hw_transfer,