Gabriel Krisman Bertazi 3c52715cea blk-cgroup: Pre-allocate tree node on blkg_conf_prep ... [ Upstream commit f255c19b3a ] Similarly to commit 457e490f2b ("blkcg: allocate struct blkcg_gq outside request queue spinlock"), blkg_create can also trigger occasional -ENOMEM failures at the radix insertion because any allocation inside blkg_create has to be non-blocking, making it more likely to fail. This causes trouble for userspace tools trying to configure io weights who need to deal with this condition. This patch reduces the occurrence of -ENOMEMs on this path by preloading the radix tree element on a GFP_KERNEL context, such that we guarantee the later non-blocking insertion won't fail. A similar solution exists in blkcg_init_queue for the same situation. Acked-by: Tejun Heo <tj@kernel.org> Signed-off-by: Gabriel Krisman Bertazi <krisman@collabora.com> Signed-off-by: Jens Axboe <axboe@kernel.dk> Signed-off-by: Sasha Levin <sashal@kernel.org>		2020-11-10 12:37:30 +01:00
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partitions	…
Kconfig	…
Kconfig.iosched	…
Makefile	…
badblocks.c	…
bfq-cgroup.c	bfq: fix blkio cgroup leakage v4	2020-09-03 11:26:54 +02:00
bfq-iosched.c	block: only call sched requeue_request() for scheduled requests	2020-09-23 12:40:37 +02:00
bfq-iosched.h	bfq: fix blkio cgroup leakage v4	2020-09-03 11:26:54 +02:00
bfq-wf2q.c	bfq: fix blkio cgroup leakage v4	2020-09-03 11:26:54 +02:00
bio-integrity.c	block: release bip in a right way in error path	2020-07-16 08:16:36 +02:00
bio.c	block/diskstats: more accurate approximation of io_ticks for slow disks	2020-10-07 08:01:29 +02:00
blk-cgroup.c	blk-cgroup: Pre-allocate tree node on blkg_conf_prep	2020-11-10 12:37:30 +01:00
blk-core.c	block: ratelimit handle_bad_sector() message	2020-10-29 09:58:01 +01:00
blk-exec.c	…
blk-flush.c	…
blk-integrity.c	…
blk-ioc.c	block: Fix use-after-free issue accessing struct io_cq	2020-04-17 10:50:04 +02:00
blk-iocost.c	blk-iocost: ioc_pd_free() shouldn't assume irq disabled	2020-09-09 19:12:35 +02:00
blk-iolatency.c	…
blk-lib.c	…
blk-map.c	…
blk-merge.c	block: fix get_max_io_size()	2020-09-03 11:27:01 +02:00
blk-mq-cpumap.c	…
blk-mq-debugfs-zoned.c	…
blk-mq-debugfs.c	blk-mq-debugfs: update blk_queue_flag_name[] accordingly for new flags	2020-07-22 09:32:52 +02:00
blk-mq-debugfs.h	…
blk-mq-pci.c	…
blk-mq-rdma.c	…
blk-mq-sched.c	blk-mq: order adding requests to hctx->dispatch and checking SCHED_RESTART	2020-09-03 11:27:01 +02:00
blk-mq-sched.h	block: only call sched requeue_request() for scheduled requests	2020-09-23 12:40:37 +02:00
blk-mq-sysfs.c	blk-mq: move cancel of hctx->run_work to the front of blk_exit_queue	2020-10-29 09:57:34 +01:00
blk-mq-tag.c	…
blk-mq-tag.h	…
blk-mq-virtio.c	…
blk-mq.c	blk-mq: order adding requests to hctx->dispatch and checking SCHED_RESTART	2020-09-03 11:27:01 +02:00
blk-mq.h	…
blk-pm.c	…
blk-pm.h	…
blk-rq-qos.c	…
blk-rq-qos.h	…
blk-settings.c	…
blk-softirq.c	…
blk-stat.c	…
blk-stat.h	…
blk-sysfs.c	blk-mq: move cancel of hctx->run_work to the front of blk_exit_queue	2020-10-29 09:57:34 +01:00
blk-throttle.c	…
blk-timeout.c	…
blk-wbt.c	…
blk-wbt.h	…
blk-zoned.c	…
blk.h	…
bounce.c	…
bsg-lib.c	…
bsg.c	…
cmdline-parser.c	…
compat_ioctl.c	…
elevator.c	…
genhd.c	…
ioctl.c	…
ioprio.c	…
kyber-iosched.c	…
mq-deadline.c	…
opal_proto.h	…
partition-generic.c	…
scsi_ioctl.c	…
sed-opal.c	…
t10-pi.c	…