aleph/lkl_linux
1
0
Fork 0
mirror of https://github.com/lkl/linux.git synced 2025-12-19 08:03:01 +09:00
Code Issues Packages Projects Releases Wiki Activity

blkcg: associate blkg when associating a device

Browse Source 
Previously, blkg association was handled by controller specific code in
blk-throttle and blk-iolatency. However, because a blkg represents a
relationship between a blkcg and a request_queue, it makes sense to keep
the blkg->q and bio->bi_disk->queue consistent.

This patch moves association into the bio_set_dev macro(). This should
cover the majority of cases where the device is set/changed keeping the
two pointers consistent. Fallback code is added to
blkcg_bio_issue_check() to catch any missing paths.

Signed-off-by: Dennis Zhou <dennis@kernel.org>
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Dennis Zhou
2018-12-05 12:10:31 -05:00
committed by Jens Axboe
parent 892ad71f62
commit 5cdf2e3fea
5 changed files with 14 additions and 12 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
block/blk-throttle.c
View File

@@ -2118,7 +2118,6 @@ static inline void throtl_update_latency_buckets(struct throtl_data *td)
static void blk_throtl_assoc_bio(struct bio *bio)
{
#ifdef CONFIG_BLK_DEV_THROTTLING_LOW
bio_associate_blkg(bio);
bio_issue_init(&bio->bi_issue, bio_sectors(bio));
#endif
}