6.6-stable review patch. If anyone has any objections, please let me know.
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From: Yu Kuai yukuai3@huawei.com
[ Upstream commit d05af90d6218e9c8f1c2026990c3f53c1b41bfb0 ]
md_account_bio() is not called from raid10_handle_discard(), now that we handle bitmap inside md_account_bio(), also fix missing bitmap_startwrite for discard.
Test whole disk discard for 20G raid10:
Before: Device d/s dMB/s drqm/s %drqm d_await dareq-sz md0 48.00 16.00 0.00 0.00 5.42 341.33
After: Device d/s dMB/s drqm/s %drqm d_await dareq-sz md0 68.00 20462.00 0.00 0.00 2.65 308133.65
Link: https://lore.kernel.org/linux-raid/20250325015746.3195035-1-yukuai1@huaweicl... Fixes: 528bc2cf2fcc ("md/raid10: enable io accounting") Signed-off-by: Yu Kuai yukuai3@huawei.com Acked-by: Coly Li colyli@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/md/raid10.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c index c300fd609ef08..36b6bf3f8b29f 100644 --- a/drivers/md/raid10.c +++ b/drivers/md/raid10.c @@ -1756,6 +1756,7 @@ static int raid10_handle_discard(struct mddev *mddev, struct bio *bio) * The discard bio returns only first r10bio finishes */ if (first_copy) { + md_account_bio(mddev, &bio); r10_bio->master_bio = bio; set_bit(R10BIO_Discard, &r10_bio->state); first_copy = false;