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block: skip cgroups for passthrough io

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Even if BLK_CGROUP is enabled, it does not work for passthrough io.
So skip setting up blkg for passthrough bio.

Reduced processing gives ~5% hike in peak-performance workload.

Signed-off-by: Kundan Kumar <kundan.kumar@samsung.com>
Signed-off-by: Kanchan Joshi <joshi.k@samsung.com>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Link: https://lore.kernel.org/r/20231218152722.1768-1-joshi.k@samsung.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Kundan Kumar 2023-12-18 20:57:22 +05:30 committed by Jens Axboe
parent 0c734c5ea7
commit 6c9b97085c
1 changed files with 3 additions and 0 deletions
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3
block/blk-cgroup.c
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@ -2064,6 +2064,9 @@ void bio_associate_blkg(struct bio *bio)
{ {
struct cgroup_subsys_state *css; struct cgroup_subsys_state *css;
if (blk_op_is_passthrough(bio->bi_opf))
return;
rcu_read_lock(); rcu_read_lock();
if (bio->bi_blkg) if (bio->bi_blkg)