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1616a4c2ab
linux/drivers/md
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Coly Li 1616a4c2ab bcache: remove bcache device self-defined readahead 
For read cache missing, bcache defines a readahead size for the read I/O
request to the backing device for the missing data. This readahead size
is initialized to 0, and almost no one uses it to avoid unnecessary read
amplifying onto backing device and write amplifying onto cache device.
Considering upper layer file system code has readahead logic allready
and works fine with readahead_cache_policy sysfile interface, we don't
have to keep bcache self-defined readahead anymore.

This patch removes the bcache self-defined readahead for cache missing
request for backing device, and the readahead sysfs file interfaces are
removed as well.

This is the preparation for next patch to fix potential kernel panic due
to oversized request in a simpler method.

Reported-by: Alexander Ullrich <ealex1979@gmail.com>
Reported-by: Diego Ercolani <diego.ercolani@gmail.com>
Reported-by: Jan Szubiak <jan.szubiak@linuxpolska.pl>
Reported-by: Marco Rebhan <me@dblsaiko.net>
Reported-by: Matthias Ferdinand <bcache@mfedv.net>
Reported-by: Victor Westerhuis <victor@westerhu.is>
Reported-by: Vojtech Pavlik <vojtech@suse.cz>
Reported-and-tested-by: Rolf Fokkens <rolf@rolffokkens.nl>
Reported-and-tested-by: Thorsten Knabe <linux@thorsten-knabe.de>
Signed-off-by: Coly Li <colyli@suse.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: stable@vger.kernel.org
Cc: Kent Overstreet <kent.overstreet@gmail.com>
Cc: Nix <nix@esperi.org.uk>
Cc: Takashi Iwai <tiwai@suse.com>
Link: https://lore.kernel.org/r/20210607125052.21277-2-colyli@suse.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-06-08 15:06:03 -06:00
..
bcache bcache: remove bcache device self-defined readahead 2021-06-08 15:06:03 -06:00
persistent-data dm persistent data: fix return type of shadow_root() 2021-02-03 10:10:05 -05:00
dm-bio-prison-v1.c
dm-bio-prison-v1.h
dm-bio-prison-v2.c
dm-bio-prison-v2.h
dm-bio-record.h block: store a block_device pointer in struct bio 2021-01-24 18:17:20 -07:00
dm-bufio.c dm bufio: subtract the number of initial sectors in dm_bufio_get_device_size 2021-03-04 14:53:54 -05:00
dm-builtin.c
dm-cache-background-tracker.c
dm-cache-background-tracker.h
dm-cache-block-types.h
dm-cache-metadata.c dm: use bdev_read_only to check if a device is read-only 2021-01-24 18:15:57 -07:00
dm-cache-metadata.h
dm-cache-policy-internal.h
dm-cache-policy-smq.c
dm-cache-policy.c
dm-cache-policy.h
dm-cache-target.c dm cache: simplify the return expression of load_mapping() 2020-12-22 09:54:48 -05:00
dm-clone-metadata.c
dm-clone-metadata.h
dm-clone-target.c dm-clone: use blkdev_issue_flush in commit_metadata 2021-01-27 09:51:48 -07:00
dm-core.h dm: fix deadlock when swapping to encrypted device 2021-02-11 09:45:28 -05:00
dm-crypt.c block: rename BIO_MAX_PAGES to BIO_MAX_VECS 2021-03-11 07:47:48 -07:00
dm-delay.c block: rename generic_make_request to submit_bio_noacct 2020-07-01 07:27:24 -06:00
dm-dust.c dm dust: remove h from printk format specifier 2021-02-03 10:10:04 -05:00
dm-ebs-target.c dm ebs: avoid double unlikely() notation when using IS_ERR() 2020-12-21 13:59:37 -05:00
dm-era-target.c dm era: only resize metadata in preresume 2021-02-11 09:45:22 -05:00
dm-exception-store.c
dm-exception-store.h
dm-flakey.c dm: simplify target code conditional on CONFIG_BLK_DEV_ZONED 2021-02-11 09:45:27 -05:00
dm-init.c dm init: Set file local variable static 2020-08-04 15:51:28 -04:00
dm-integrity.c dm integrity: introduce the "fix_hmac" argument 2021-02-03 10:10:05 -05:00
dm-io.c block: Add bio_max_segs 2021-02-26 15:49:51 -07:00
dm-ioctl.c dm ioctl: fix out of bounds array access when no devices 2021-03-26 14:51:50 -04:00
dm-kcopyd.c
dm-linear.c dm: simplify target code conditional on CONFIG_BLK_DEV_ZONED 2021-02-11 09:45:27 -05:00
dm-log-userspace-base.c
dm-log-userspace-transfer.c
dm-log-userspace-transfer.h
dm-log-writes.c block: Add bio_max_segs 2021-02-26 15:49:51 -07:00
dm-log.c
dm-mpath.c dm: use dm_table_get_device_name() where appropriate in targets 2020-09-29 16:33:08 -04:00
dm-mpath.h
dm-path-selector.c
dm-path-selector.h
dm-ps-historical-service-time.c dm: rename multipath path selector source files to have "dm-ps" prefix 2020-12-04 18:04:35 -05:00
dm-ps-io-affinity.c dm: rename multipath path selector source files to have "dm-ps" prefix 2020-12-04 18:04:35 -05:00
dm-ps-queue-length.c dm: rename multipath path selector source files to have "dm-ps" prefix 2020-12-04 18:04:35 -05:00
dm-ps-round-robin.c dm: rename multipath path selector source files to have "dm-ps" prefix 2020-12-04 18:04:35 -05:00
dm-ps-service-time.c dm: rename multipath path selector source files to have "dm-ps" prefix 2020-12-04 18:04:35 -05:00
dm-raid1.c block: store a block_device pointer in struct bio 2021-01-24 18:17:20 -07:00
dm-raid.c dm raid: fix discard limits for raid1 2021-01-04 15:02:30 -05:00
dm-region-hash.c
dm-rq.c block: remove the request_queue to argument request based tracepoints 2020-12-04 09:42:00 -07:00
dm-rq.h
dm-snap-persistent.c dm snap persistent: simplify area_io() 2020-09-29 16:33:12 -04:00
dm-snap-transient.c
dm-snap.c dm snapshot: flush merged data before committing metadata 2021-01-06 18:28:34 -05:00
dm-stats.c dm: replace zero-length array with flexible-array 2020-05-20 17:09:44 -04:00
dm-stats.h
dm-stripe.c dm: add support for REQ_NOWAIT to various targets 2020-12-04 18:04:35 -05:00
dm-switch.c dm: add support for REQ_NOWAIT to various targets 2020-12-04 18:04:35 -05:00
dm-sysfs.c
dm-table.c dm table: Fix zoned model check and zone sectors check 2021-03-22 12:32:31 -04:00
dm-target.c
dm-thin-metadata.c dm: use bdev_read_only to check if a device is read-only 2021-01-24 18:15:57 -07:00
dm-thin-metadata.h
dm-thin.c writeback: remove bdi->congested_fn 2020-07-08 17:20:46 -06:00
dm-uevent.c
dm-uevent.h
dm-unstripe.c dm: add support for REQ_NOWAIT to various targets 2020-12-04 18:04:35 -05:00
dm-verity-fec.c dm verity fec: fix misaligned RS roots IO 2021-04-14 14:28:29 -04:00
dm-verity-fec.h dm verity fec: fix misaligned RS roots IO 2021-04-14 14:28:29 -04:00
dm-verity-target.c dm verity: fix DM_VERITY_OPTS_MAX value 2021-03-22 12:32:30 -04:00
dm-verity-verify-sig.c dm verity: Add support for signature verification with 2nd keyring 2020-12-04 18:04:35 -05:00
dm-verity-verify-sig.h dm verity: Fix compilation warning 2020-08-04 15:48:13 -04:00
dm-verity.h dm verity: add "panic_on_corruption" error handling mode 2020-07-13 11:47:33 -04:00
dm-writecache.c block: rename BIO_MAX_PAGES to BIO_MAX_VECS 2021-03-11 07:47:48 -07:00
dm-zero.c dm: add support for REQ_NOWAIT to various targets 2020-12-04 18:04:35 -05:00
dm-zoned-metadata.c block: use an on-stack bio in blkdev_issue_flush 2021-01-27 09:51:48 -07:00
dm-zoned-reclaim.c dm zoned: Fix zone reclaim trigger 2020-07-08 12:21:53 -04:00
dm-zoned-target.c dm table: Fix zoned model check and zone sectors check 2021-03-22 12:32:31 -04:00
dm-zoned.h dm zoned: select reclaim zone based on device index 2020-06-05 14:59:53 -04:00
dm.c dm: don't report "detected capacity change" on device creation 2021-03-22 12:32:32 -04:00
dm.h dm table: fix DAX iterate_devices based device capability checks 2021-02-09 08:45:30 -05:00
Kconfig dm crypt: support using trusted keys 2021-02-03 10:13:00 -05:00
Makefile dm: rename multipath path selector source files to have "dm-ps" prefix 2020-12-04 18:04:35 -05:00
md-autodetect.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
md-bitmap.c md/bitmap: wait for external bitmap writes to complete during tear down 2021-04-15 11:06:32 -07:00
md-bitmap.h
md-cluster.c for-5.11/drivers-2020-12-14 2020-12-16 13:09:32 -08:00
md-cluster.h
md-faulty.c block: rename generic_make_request to submit_bio_noacct 2020-07-01 07:27:24 -06:00
md-linear.c block: store a block_device pointer in struct bio 2021-01-24 18:17:20 -07:00
md-linear.h
md-multipath.c writeback: remove bdi->congested_fn 2020-07-08 17:20:46 -06:00
md-multipath.h
md.c md-cluster: fix use-after-free issue when removing rdev 2021-04-23 09:39:04 -07:00
md.h md: add md_submit_discard_bio() for submitting discard bio 2021-03-24 16:29:06 -07:00
raid0.c md: add md_submit_discard_bio() for submitting discard bio 2021-03-24 16:29:06 -07:00
raid0.h
raid1-10.c
raid1.c md/raid1: properly indicate failure when ending a failed write request 2021-04-23 09:40:17 -07:00
raid1.h
raid5-cache.c block: rename BIO_MAX_PAGES to BIO_MAX_VECS 2021-03-11 07:47:48 -07:00
raid5-log.h
raid5-ppl.c block: rename BIO_MAX_PAGES to BIO_MAX_VECS 2021-03-11 07:47:48 -07:00
raid5.c md/raid5: remove an incorrect assert in in_chunk_boundary 2021-05-25 18:03:15 -07:00
raid5.h md/raid5: let multiple devices of stripe_head share page 2020-09-24 16:44:44 -07:00
raid10.c md/raid10: improve discard request for far layout 2021-03-24 16:29:07 -07:00
raid10.h md/raid10: improve discard request for far layout 2021-03-24 16:29:07 -07:00