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authorDennis Zhou <dennis@kernel.org>2018-12-05 12:10:31 -0500
committerJens Axboe <axboe@kernel.dk>2018-12-07 22:26:37 -0700
commit5cdf2e3fea5ee37b66842d76a9b06e6dac0b933d (patch)
treeb460ef1ba02562982e2f000e704ce7214be4d5f3 /include/linux/bio.h
parent892ad71f622bbf39c6de321d5ca9b0fdec237c24 (diff)
blkcg: associate blkg when associating a device
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>
Diffstat (limited to 'include/linux/bio.h')
-rw-r--r--include/linux/bio.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/bio.h b/include/linux/bio.h
index 62715a5a4f32..6ee2ea8b378a 100644
--- a/include/linux/bio.h
+++ b/include/linux/bio.h
@@ -491,12 +491,14 @@ do { \
bio_clear_flag(bio, BIO_THROTTLED);\
(bio)->bi_disk = (bdev)->bd_disk; \
(bio)->bi_partno = (bdev)->bd_partno; \
+ bio_associate_blkg(bio); \
} while (0)
#define bio_copy_dev(dst, src) \
do { \
(dst)->bi_disk = (src)->bi_disk; \
(dst)->bi_partno = (src)->bi_partno; \
+ bio_clone_blkcg_association(dst, src); \
} while (0)
#define bio_dev(bio) \