NeilBrown a8821f3f32 block: Improvements to bounce-buffer handling ... Since commit 23688bf4f8 ("block: ensure to split after potentially bouncing a bio") blk_queue_bounce() is called *before* blk_queue_split(). This means that: 1/ the comments blk_queue_split() about bounce buffers are irrelevant, and 2/ a very large bio (more than BIO_MAX_PAGES) will no longer be split before it arrives at blk_queue_bounce(), leading to the possibility that bio_clone_bioset() will fail and a NULL will be dereferenced. Separately, blk_queue_bounce() shouldn't use fs_bio_set as the bio being copied could be from the same set, and this could lead to a deadlock. So: - allocate 2 private biosets for blk_queue_bounce, one for splitting enormous bios and one for cloning bios. - add code to split a bio that exceeds BIO_MAX_PAGES. - Fix up the comments in blk_queue_split() Credit-to: Ming Lei <tom.leiming@gmail.com> (suggested using single bio_for_each_segment loop) Reviewed-by: Ming Lei <ming.lei@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: NeilBrown <neilb@suse.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>		2017-06-18 12:40:59 -06:00
..
partitions	partitions/ldm: switch to use uuid_t	2017-06-05 16:59:14 +02:00
badblocks.c	badblocks: badblocks_set/clear update unacked_exist	2016-10-21 15:45:47 -06:00
bfq-cgroup.c	block, bfq: access and cache blkg data only when safe	2017-06-08 09:51:10 -06:00
bfq-iosched.c	blk-mq-sched: unify request prepare methods	2017-06-18 10:08:55 -06:00
bfq-iosched.h	block, bfq: access and cache blkg data only when safe	2017-06-08 09:51:10 -06:00
bfq-wf2q.c	block, bfq: use pointer entity->sched_data only if set	2017-05-10 07:39:43 -06:00
bio-integrity.c	Linux 4.12-rc5	2017-06-12 08:30:13 -06:00
bio.c	blk: make the bioset rescue_workqueue optional.	2017-06-18 12:40:59 -06:00
blk-cgroup.c	block: Avoid that blk_exit_rl() triggers a use-after-free	2017-06-01 13:07:55 -06:00
blk-core.c	blk: use non-rescuing bioset for q->bio_split.	2017-06-18 12:40:59 -06:00
blk-exec.c	block: introduce new block status code type	2017-06-09 09:27:32 -06:00
blk-flush.c	block: introduce new block status code type	2017-06-09 09:27:32 -06:00
blk-integrity.c	block: switch bios to blk_status_t	2017-06-09 09:27:32 -06:00
blk-ioc.c	Merge branch 'for-linus' of git://git.kernel.dk/linux-block	2017-03-03 10:53:35 -08:00
blk-lib.c	block: remove the discard_zeroes_data flag	2017-04-08 11:25:38 -06:00
blk-map.c	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/task_stack.h>	2017-03-02 08:42:36 +01:00
blk-merge.c	block: Improvements to bounce-buffer handling	2017-06-18 12:40:59 -06:00
blk-mq-cpumap.c	blk-mq: export blk_mq_map_queues	2016-11-08 17:30:00 -05:00
blk-mq-debugfs.c	blk-mq-debugfs: Add 'kick' operation	2017-06-01 13:03:00 -06:00
blk-mq-debugfs.h	mq-deadline: add debugfs attributes	2017-05-04 08:25:17 -06:00
blk-mq-pci.c	blk-mq-pci: Fix two spelling mistakes	2017-03-29 11:09:51 -06:00
blk-mq-sched.c	blk-mq: refactor blk_mq_sched_assign_ioc	2017-06-18 10:08:55 -06:00
blk-mq-sched.h	blk-mq: refactor blk_mq_sched_assign_ioc	2017-06-18 10:08:55 -06:00
blk-mq-sysfs.c	blk-mq: untangle debugfs and sysfs	2017-05-04 08:24:13 -06:00
blk-mq-tag.c	blk-mq: add shallow depth option for blk_mq_get_tag()	2017-04-14 14:06:54 -06:00
blk-mq-tag.h	blk-mq-sched: Allocate sched reserved tags as specified in the original queue tagset	2017-03-02 08:56:04 -07:00
blk-mq-virtio.c	blk-mq: provide a default queue mapping for virtio device	2017-02-27 20:54:05 +02:00
blk-mq.c	blk: remove bio_set arg from blk_queue_split()	2017-06-18 12:40:59 -06:00
blk-mq.h	blk-mq: remove __blk_mq_alloc_request	2017-06-18 10:08:55 -06:00
blk-settings.c	block: remove the discard_zeroes_data flag	2017-04-08 11:25:38 -06:00
blk-softirq.c	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/topology.h>	2017-03-02 08:42:26 +01:00
blk-stat.c	blk-stat: don't use this_cpu_ptr() in a preemptable section	2017-05-10 07:40:18 -06:00
blk-stat.h	blk-stat: kill blk_stat_rq_ddir()	2017-04-21 07:56:23 -06:00
blk-sysfs.c	block: Avoid that blk_exit_rl() triggers a use-after-free	2017-06-01 13:07:55 -06:00
blk-tag.c	blk-mq-sched: add framework for MQ capable IO schedulers	2017-01-17 10:04:20 -07:00
blk-throttle.c	blk-throttle: set default latency baseline for harddisk	2017-06-07 09:09:32 -06:00
blk-timeout.c	block: remove the errors field from struct request	2017-04-20 12:16:10 -06:00
blk-wbt.c	blk-stat: kill blk_stat_rq_ddir()	2017-04-21 07:56:23 -06:00
blk-wbt.h	block: Make writeback throttling defaults consistent for SQ devices	2017-04-19 08:49:03 -06:00
blk-zoned.c	block: Rename blk_queue_zone_size and bdev_zone_size	2017-01-12 07:58:32 -07:00
blk.h	block: Avoid that blk_exit_rl() triggers a use-after-free	2017-06-01 13:07:55 -06:00
bounce.c	block: Improvements to bounce-buffer handling	2017-06-18 12:40:59 -06:00
bsg-lib.c	block: introduce new block status code type	2017-06-09 09:27:32 -06:00
bsg.c	block: introduce new block status code type	2017-06-09 09:27:32 -06:00
cfq-iosched.c	Linux 4.12-rc5	2017-06-12 08:30:13 -06:00
cmdline-parser.c	block: remove unrelated header files and export symbol	2014-01-21 20:18:26 -08:00
compat_ioctl.c	block: remove the discard_zeroes_data flag	2017-04-08 11:25:38 -06:00
deadline-iosched.c	block: enumify ELEVATOR_*_MERGE	2017-02-08 13:43:06 -07:00
elevator.c	elevator: remove redundant warnings on IO scheduler switch	2017-05-10 07:40:04 -06:00
genhd.c	A reasonably busy cycle for documentation this time around. There is a new	2017-05-02 10:21:17 -07:00
ioctl.c	block: remove the discard_zeroes_data flag	2017-04-08 11:25:38 -06:00
ioprio.c	block: Optimize ioprio_best()	2017-04-19 17:38:36 -06:00
Kconfig	Merge branch 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm	2017-05-12 15:43:10 -07:00
Kconfig.iosched	block, bfq: add full hierarchical scheduling and cgroups support	2017-04-19 08:30:26 -06:00
kyber-iosched.c	blk-mq-sched: unify request prepare methods	2017-06-18 10:08:55 -06:00
Makefile	block, bfq: split bfq-iosched.c into multiple source files	2017-04-19 08:48:24 -06:00
mq-deadline.c	mq-deadline: add debugfs attributes	2017-05-04 08:25:17 -06:00
noop-iosched.c	block: move existing elevator ops to union	2017-01-17 10:03:33 -07:00
opal_proto.h	block/sed-opal: allocate struct opal_dev dynamically	2017-02-17 12:41:47 -07:00
partition-generic.c	block: fix an error code in add_partition()	2017-05-23 08:41:59 -06:00
scsi_ioctl.c	scsi: introduce a result field in struct scsi_request	2017-04-20 12:16:10 -06:00
sed-opal.c	block: sed-opal: Tone down all the pr_* to debugs	2017-04-07 14:24:16 -06:00
t10-pi.c	block: Dedicated error code fixups	2017-06-16 09:47:15 -06:00