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ANDROID: dm-bow: Fix not to skip trim at framented range

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If free blocks hole is smaller than discard_granularity,
TRIM to this range can be skipped.
Fix this by changing the granularity to 4kb at dm-bow layer,
not to skip TRIM to every tiny free blocks.

Bug: 154411183
Signed-off-by: hyeongseok.kim <hyeongseok@gmail.com>
Cc: hyeongseok.kim <hyeongseok.kim@lge.com>
Change-Id: Ic7c33d94a016d0ad5a75514eae1056c328c9c1ba
(cherry picked from commit ca986e448cf2f92f1bb672fe9bc0b651fa6b76c5)
Signed-off-by: Paul Lawrence <paullawrence@google.com>
This commit is contained in:
hyeongseok.kim 2020-04-21 08:42:08 +09:00 • committed by Paul Lawrence
commit f651e6024c
1 changed files with 1 additions and 0 deletions
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1
drivers/md/dm-bow.c
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@ -657,6 +657,7 @@ static int dm_bow_ctr(struct dm_target *ti, unsigned int argc, char **argv)
bc->dev->bdev->bd_queue->limits.max_discard_sectors = 1 << 15;
bc->forward_trims = false;
} else {
bc->dev->bdev->bd_queue->limits.discard_granularity = 1 << 12;
bc->forward_trims = true;
}