[GIT PULL] Core block changes for 3.18

From: Jens Axboe
Date: Sat Oct 18 2014 - 10:46:57 EST

Hi Linus,

This is the core block IO pull request for 3.18. Apart from the new and
improve flush machinery for blk-mq, this is all mostly bug fixes and
cleanups.

- blk-mq timeout updates and fixes from Christoph.

- Removal of REQ_END, also from Christoph. We pass it through the
->queue_rq() hook for blk-mq instead, freeing up one of the request
bits. The space was overly tight on 32-bit, so Martin also killed
REQ_KERNEL since it's no longer used.

- blk integrity updates and fixes from Martin and Gu Zheng.

- Update to the flush machinery for blk-mq from Ming Lei. Now we have a
per hardware context flush request, which both cleans up the code
should scale better for flush intensive workloads on blk-mq.

- Improve the error printing, from Rob Elliott.

- Backing device improvements and cleanups from Tejun.

- Fixup of a misplaced rq_complete() tracepoint from Hannes.

- Make blk_get_request() return error pointers, fixing up issues where
we NULL deref when a device goes bad or missing. From Joe Lawrence.

- Prep work for drastically reducing the memory consumption of dm
devices from Junichi Nomura. This allows creating clone bio sets
without preallocating a lot of memory.

- Fix a blk-mq hang on certain combinations of queue depths and hardware
queues from me.

- Limit memory consumption for blk-mq devices for crash dump scenarios
and drivers that use crazy high depths (certain SCSI shared tag
setups). We now just use a single queue and limited depth for that.


Please pull!


git://git.kernel.dk/linux-block.git for-3.18/core


----------------------------------------------------------------
Bart Van Assche (1):
blk-mq: Make bt_clear_tag() easier to read

Christoph Hellwig (8):
blk-mq: remove REQ_END
blk-mq: call blk_mq_start_request from ->queue_rq
blk-mq: rename blk_mq_end_io to blk_mq_end_request
blk-mq: fix and simplify tag iteration for the timeout handler
blk-mq: unshared timeout handler
blk-mq: pass a reserved argument to the timeout handler
block: fix blk_abort_request on blk-mq
scsi: move blk_mq_start_request call earlier

Gu Zheng (1):
bio-integrity: remove the needless fail handle of bip_slab creating

Hannes Reinecke (1):
block: misplaced rq_complete tracepoint

Jens Axboe (6):
bsg: fix potential error pointer dereference
Merge branch 'for-linus' into for-3.18/core
Merge branch 'for-linus' into for-3.18/core
blk-mq: limit memory consumption if a crash dump is active
blk-mq: fix potential hang if rolling wakeup depth is too high
blk-mq: allocate cpumask on the home node

Joe Lawrence (2):
block,scsi: verify return pointer from blk_get_request
block,scsi: fixup blk_get_request dead queue scenarios

Junichi Nomura (2):
block: use bio_clone_fast() in blk_rq_prep_clone()
block: add bioset_create_nobvec()

Martin K. Petersen (15):
block: Get rid of bdev_integrity_enabled()
block: Replace bi_integrity with bi_special
block: Remove integrity tagging functions
block: Remove bip_buf
block: Deprecate the use of the term sector in the context of block integrity
block: Make protection interval calculation generic
block: Clean up the code used to generate and verify integrity metadata
block: Add prefix to block integrity profile flags
block: Add a disk flag to block integrity profile
block: Relocate bio integrity flags
block: Integrity checksum flag
block: Don't merge requests if integrity flags differ
block: Add T10 Protection Information functions
sd: Honor block layer integrity handling flags
block: Remove REQ_KERNEL

Mike Snitzer (1):
block: fix alignment_offset math that assumes io_min is a power-of-2

Ming Lei (13):
blk-mq: remove unnecessary blk_clear_rq_complete()
blk-timeout: fix blk_add_timer
blk-mq: handle failure path for initializing hctx
blk-mq: allocate flush_rq in blk_mq_init_flush()
block: introduce blk_init_flush and its pair
block: move flush initialization to blk_flush_init
block: avoid to use q->flush_rq directly
block: introduce blk_flush_queue to drive flush machinery
block: remove blk_init_flush() and its pair
block: flush: avoid to figure out flush queue unnecessarily
block: introduce 'blk_mq_ctx' parameter to blk_get_flush_queue
blk-mq: support per-distpatch_queue flush machinery
blk-merge: don't compute bi_phys_segments from bi_vcnt for cloned bio

Rasmus Villemoes (1):
block: Replace strnicmp with strncasecmp

Robert Elliott (2):
block: make blk_update_request print prefix match ratelimited prefix
block: include func name in __get_request prints

Tejun Heo (7):
blkcg: remove blkcg->id
block, bdi: an active gendisk always has a request_queue associated with it
bdi: remove unused stuff
bdi: remove bdi->wb_lock locking around bdi->dev clearing in bdi_unregister()
bdi: make backing_dev_info->wb.dwork canceling stricter
bdi: explain the dirty list transferring in bdi_destroy()
bdi: reimplement bdev_inode_switch_bdi()

Documentation/ABI/testing/sysfs-block | 8 +
Documentation/block/data-integrity.txt | 54 +----
block/Kconfig | 1 +
block/Makefile | 4 +-
block/bio-integrity.c | 271 ++++++---------------
block/bio.c | 61 +++--
block/blk-cgroup.c | 2 -
block/blk-cgroup.h | 3 -
block/blk-core.c | 71 +++---
block/blk-flush.c | 147 +++++++----
block/blk-integrity.c | 103 +++++---
block/blk-merge.c | 14 +-
block/blk-mq-tag.c | 55 ++---
block/blk-mq.c | 364 ++++++++++++++--------------
block/blk-mq.h | 3 +-
block/blk-settings.c | 4 +-
block/blk-sysfs.c | 4 +-
block/blk-timeout.c | 15 +-
block/blk.h | 37 ++-
block/bsg.c | 9 +-
block/cfq-iosched.c | 10 +-
block/compat_ioctl.c | 4 -
block/ioctl.c | 4 -
block/partitions/mac.c | 8 +-
block/scsi_ioctl.c | 11 +-
block/t10-pi.c | 197 +++++++++++++++
drivers/block/mtip32xx/mtip32xx.c | 9 +-
drivers/block/null_blk.c | 7 +-
drivers/block/paride/pd.c | 2 +
drivers/block/pktcdvd.c | 2 +
drivers/block/sx8.c | 2 +-
drivers/block/virtio_blk.c | 8 +-
drivers/cdrom/cdrom.c | 4 +-
drivers/ide/ide-park.c | 2 +-
drivers/scsi/Kconfig | 1 -
drivers/scsi/device_handler/scsi_dh_alua.c | 2 +-
drivers/scsi/device_handler/scsi_dh_emc.c | 2 +-
drivers/scsi/device_handler/scsi_dh_hp_sw.c | 4 +-
drivers/scsi/device_handler/scsi_dh_rdac.c | 2 +-
drivers/scsi/osd/osd_initiator.c | 4 +-
drivers/scsi/osst.c | 2 +-
drivers/scsi/scsi_error.c | 2 +
drivers/scsi/scsi_lib.c | 24 +-
drivers/scsi/sd.c | 73 +++---
drivers/scsi/sd.h | 66 ++++-
drivers/scsi/sd_dif.c | 353 ++++-----------------------
drivers/scsi/sg.c | 4 +-
drivers/scsi/st.c | 2 +-
drivers/target/target_core_pscsi.c | 2 +-
fs/block_dev.c | 34 +--
fs/btrfs/disk-io.c | 2 +-
fs/nfs/direct.c | 12 +-
fs/nfs/file.c | 4 +-
fs/xfs/xfs_buf.c | 2 -
include/linux/backing-dev.h | 4 -
include/linux/bio.h | 65 +++--
include/linux/blk-mq.h | 22 +-
include/linux/blk_types.h | 18 +-
include/linux/blkdev.h | 71 +++---
include/linux/crc-t10dif.h | 5 +-
include/linux/fs.h | 2 -
include/linux/nfs_fs.h | 4 +-
include/linux/t10-pi.h | 22 ++
include/scsi/scsi_cmnd.h | 36 ++-
include/scsi/scsi_tcq.h | 2 +-
mm/backing-dev.c | 40 ++-
66 files changed, 1213 insertions(+), 1175 deletions(-)
create mode 100644 block/t10-pi.c
create mode 100644 include/linux/t10-pi.h

--
Jens Axboe

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