Shaohua Li 111be88398 block-throttle: avoid double charge ... If a bio is throttled and split after throttling, the bio could be resubmited and enters the throttling again. This will cause part of the bio to be charged multiple times. If the cgroup has an IO limit, the double charge will significantly harm the performance. The bio split becomes quite common after arbitrary bio size change. To fix this, we always set the BIO_THROTTLED flag if a bio is throttled. If the bio is cloned/split, we copy the flag to new bio too to avoid a double charge. However, cloned bio could be directed to a new disk, keeping the flag be a problem. The observation is we always set new disk for the bio in this case, so we can clear the flag in bio_set_dev(). This issue exists for a long time, arbitrary bio size change just makes it worse, so this should go into stable at least since v4.2. V1-> V2: Not add extra field in bio based on discussion with Tejun Cc: Vivek Goyal <vgoyal@redhat.com> Cc: stable@vger.kernel.org Acked-by: Tejun Heo <tj@kernel.org> Signed-off-by: Shaohua Li <shli@fb.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>		2017-12-20 11:10:17 -07:00
..
partitions	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
Kconfig	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
Kconfig.iosched	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
Makefile	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
badblocks.c	badblocks: fix wrong return value in badblocks_set if badblocks are disabled	2017-11-03 11:29:50 -07:00
bfq-cgroup.c	block, bfq: move debug blkio stats behind CONFIG_DEBUG_BLK_CGROUP	2017-11-14 20:13:33 -07:00
bfq-iosched.c	block, bfq: move debug blkio stats behind CONFIG_DEBUG_BLK_CGROUP	2017-11-14 20:13:33 -07:00
bfq-iosched.h	block, bfq: move debug blkio stats behind CONFIG_DEBUG_BLK_CGROUP	2017-11-14 20:13:33 -07:00
bfq-wf2q.c	block, bfq: update blkio stats outside the scheduler lock	2017-11-14 20:13:33 -07:00
bio-integrity.c	…
bio.c	block-throttle: avoid double charge	2017-12-20 11:10:17 -07:00
blk-cgroup.c	blkcg: add sanity check for blkcg policy operations	2017-11-04 12:31:15 -06:00
blk-core.c	block/laptop_mode: Convert timers to use timer_setup()	2017-11-21 15:46:44 -08:00
blk-exec.c	…
blk-flush.c	blk-mq: don't allocate driver tag upfront for flush rq	2017-11-04 12:40:13 -06:00
blk-integrity.c	…
blk-ioc.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
blk-lib.c	Merge branch 'for-4.15/block' of git://git.kernel.dk/linux-block	2017-11-14 15:32:19 -08:00
blk-map.c	block: fix blk_rq_append_bio	2017-12-18 13:55:43 -07:00
blk-merge.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
blk-mq-cpumap.c	…
blk-mq-debugfs.c	Merge branch 'for-4.15/block' of git://git.kernel.dk/linux-block	2017-11-14 15:32:19 -08:00
blk-mq-debugfs.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
blk-mq-pci.c	…
blk-mq-rdma.c	…
blk-mq-sched.c	blk-mq: only run the hardware queue if IO is pending	2017-11-10 19:55:57 -07:00
blk-mq-sched.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
blk-mq-sysfs.c	…
blk-mq-tag.c	block: remove blk_mq_reinit_tagset	2017-10-18 19:27:49 +02:00
blk-mq-tag.h	Merge branch 'for-4.15/block' of git://git.kernel.dk/linux-block	2017-11-14 15:32:19 -08:00
blk-mq-virtio.c	…
blk-mq.c	block/blk-mq.c: use kmalloc_array_node()	2017-11-15 18:21:02 -08:00
blk-mq.h	Merge branch 'for-4.15/block' of git://git.kernel.dk/linux-block	2017-11-14 15:32:19 -08:00
blk-settings.c	block: remove __bio_kmap_atomic	2017-11-10 19:53:25 -07:00
blk-softirq.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
blk-stat.c	treewide: setup_timer() -> timer_setup()	2017-11-21 15:57:07 -08:00
blk-stat.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
blk-sysfs.c	blk-sysfs: remove NULL pointer checking in queue_wb_lat_store	2017-11-23 22:00:17 -07:00
blk-tag.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
blk-throttle.c	block-throttle: avoid double charge	2017-12-20 11:10:17 -07:00
blk-timeout.c	block: Fix a race between blk_cleanup_queue() and timeout handling	2017-10-30 13:28:10 -06:00
blk-wbt.c	blk-wbt: fix comments typo	2017-11-23 22:00:20 -07:00
blk-wbt.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
blk-zoned.c	…
blk.h	Merge branch 'for-4.15/block' of git://git.kernel.dk/linux-block	2017-11-14 15:32:19 -08:00
bounce.c	block: don't let passthrough IO go into .make_request_fn()	2017-12-18 13:55:43 -07:00
bsg-lib.c	…
bsg.c	block: pass full fmode_t to blk_verify_command	2017-11-10 19:53:25 -07:00
cfq-iosched.c	…
cmdline-parser.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
compat_ioctl.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
deadline-iosched.c	…
elevator.c	elevator: allow name aliases	2017-10-25 12:36:50 -06:00
genhd.c	block: genhd.c: fix message typo	2017-11-19 11:02:19 -07:00
ioctl.c	block: move CAP_SYS_ADMIN check in blkdev_roset()	2017-10-25 12:25:00 -06:00
ioprio.c	…
kyber-iosched.c	kyber: fix another domain token wait queue hang	2017-12-06 12:33:07 -07:00
mq-deadline.c	mq-deadline: add 'deadline' as a name alias	2017-10-25 12:36:55 -06:00
noop-iosched.c	…
opal_proto.h	…
partition-generic.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
scsi_ioctl.c	block: pass full fmode_t to blk_verify_command	2017-11-10 19:53:25 -07:00
sed-opal.c	…
t10-pi.c	…