Prev: AFS: Implement an autocell mount capability
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From: Jens Axboe on 9 Aug 2010 08:50
Hi Linus,

So lets try this for real. It appears to work fine, on the laptop
and running tests on a box back home. At the very end is the fixup
patch for merging.

Please pull!

git://git.kernel.dk/linux-2.6-block.git for-2.6.36

Andi Kleen (2):
gcc-4.6: block: fix unused but set variables in blk-merge
gcc-4.6: fs: fix unused but set warnings

Arnd Bergmann (8):
scsi/i2o_block: cleanup ioctl handling
block: push down BKL into .locked_ioctl
block: push down BKL into .open and .release
block: push BKL into blktrace ioctls
block: remove BKL from BLKROSET and BLKFLSBUF
block: remove BKL from partition ioctls
scsi/sd: remove big kernel lock
scsi/i2o: restore ioctl changes

Artem Bityutskiy (15):
writeback: harmonize writeback threads naming
writeback: fix possible race when creating bdi threads
writeback: do not lose wake-ups in the forker thread - 1
writeback: do not lose wake-ups in the forker thread - 2
writeback: do not lose wake-ups in bdi threads
writeback: simplify bdi code a little
writeback: do not remove bdi from bdi_list
writeback: move last_active to bdi
writeback: restructure bdi forker loop a little
writeback: move bdi threads exiting logic to the forker thread
writeback: prevent unnecessary bdi threads wakeups
writeback: optimize periodic bdi thread wakeups
writeback: remove unnecessary init_timer call
writeback: add new tracepoints
writeback: cleanup bdi_register

Christoph Hellwig (7):
block: BARRIER request should imply SYNC
block: remove wrappers for request type/flags
block: unify flags for struct bio and struct request
block: fix some more cmd_type cleanup fallout
writeback: remove wb_list
writeback: merge bdi_writeback_task and bdi_start_fn
block: don't allocate a payload for discard request

Daniel Stodden (11):
xenbus: Make xenbus_switch_state transactional
blkfront: Fix backtrace in del_gendisk
blkfront: Fix gendisk leak
blkfront: Clean up vbd release
blkfront: Lock blkfront_info when closing
blkfront: Fix blkfront backend switch race (bdev open)
blkfront: Fix blkfront backend switch race (bdev release)
blkfront: Lock blockfront_info during xbdev removal
blkfront: Remove obsolete info->users
blkfront: Remove obsolete info->users
blkfront: Klog the unclean release path

Dave Chinner (4):
writeback: Initial tracing support
writeback: Add tracing to balance_dirty_pages
writeback: Add tracing to write_cache_pages
blkdev: check for valid request queue before issuing flush

Dmitry Monakhov (1):
blkdev: fix blkdev_issue_zeroout return value

FUJITA Tomonori (21):
aha1532: remove ISA_DMA_THRESHOLD usage
block: kill ISA_DMA_THRESHOLD usage
remove needless ISA_DMA_THRESHOLD
scsi: add sd_unprep_fn to free discard page
scsi: remove unused free discard page in sd_done
block: introduce REQ_FLUSH flag
block: permit PREFLUSH and POSTFLUSH without prepare_flush_fn
scsi: stop using q->prepare_flush_fn
osdblk: stop using q->prepare_flush_fn
ps3disk: stop using q->prepare_flush_fn
dm: stop using q->prepare_flush_fn
virtio_blk: stop using q->prepare_flush_fn
ide: stop using q->prepare_flush_fn
block: remove q->prepare_flush_fn completely
scsi: need to reset unprep_rq_fn in sd_remove
block: remove unused REQ_TYPE_LINUX_BLOCK
scsi: fix discard page leak
scsi: convert discard to REQ_TYPE_FS from REQ_TYPE_BLOCK_PC
block: set REQ_TYPE_FS on flush requests
block: set up rq->rq_disk properly for flush requests
scsi: use REQ_TYPE_FS for flush request

Ian Campbell (1):
xen: use less generic names in blkfront driver.

James Bottomley (1):
block: implement an unprep function corresponding directly to prep

Jan Beulich (2):
blkfront: fixes for 'xm block-detach ... --force'
blkfront: don't access freed struct xenbus_device

Jens Axboe (9):
block: add sysfs knob for turning off disk entropy contributions
block: add helpers for the trivial queue flag sysfs show/store entries
virtio_blk: add default case to cmd type switch
block: fixup missing conversion from BIO_RW_DISCARD to REQ_DISCARD
block: fix problem with sending down discard that isn't of correct granularity
coda: fixup clash with block layer REQ_* defines
writeback: fix bad _bh spinlock nesting
block: fix missing export of blk_types.h
xen-blkfront: fix missing out label

Jeremy Fitzhardinge (3):
xen/blkfront: avoid compiler warning from missing cases
xen/blkfront: use tagged queuing for barriers
xen/blkfront: Use QUEUE_ORDERED_DRAIN for old backends

Joe Perches (1):
drivers/cdrom: use pr_<level>

Julia Lawall (1):
drivers/block: use memdup_user

K. Y. Srinivasan (2):
xen/front: Propagate changed size of VBDs
xen/blkfront: revalidate after setting capacity

Kulikov Vasiliy (1):
cpqarray: check put_user() result

Lars Ellenberg (1):
drbd: revert "delay probes", feature is being re-implemented differently

Mike Miller (11):
cciss: enqueue and submit io
cciss: clean up interrupt handler
cciss: check for msi in interrupt_not_for_us
cciss: make interrupt access methods return type bool
cciss: add performant mode support for Stars/Sirius
cciss: new controller support and bump driver version
cciss: make sure we request the performant mode irq
cciss: fix call to put_controller_in_performant_mode
cciss: move next_command function from ifdef
cciss: remove errant debug code
cciss: change pad value from 32 to 0

Mike Snitzer (1):
block: disallow FS recursion from sb_issue_discard allocation

Miklos Szeredi (1):
splice: fix misuse of SPLICE_F_NONBLOCK

Minchan Kim (1):
writeback: remove wb in get_next_work_item

Philipp Reisner (2):
drbd: Disable delay probes for the upcomming release
drbd: Initialize all members of sync_conf to their defaults [Bugz 315]

Randy Dunlap (2):
block/xd.c: fix brace typo
writeback.h: needs linux/device.h

Stephen Hemminger (9):
floppy: initialize debug jiffies offset
floppy: remove unnecessary inlines
floppy: silence warning during disk test
floppy: use atomic type for usage_count
floppy: cmos attribute should be static
floppy: fix signed/unsigned warnings
floppy: use wait_event_interruptible
floppy: use warning macros
floppy: make controller const

Stephen M. Cameron (26):
cciss: Set the performant mode bit in the scsi half of the driver
cciss: save pdev pointer in per hba structure early to avoid passing it around so much.
cciss: factor out cciss_lookup_board_id
cciss: factor out cciss_board_disabled
cciss: remove board_id parameter from cciss_interrupt_mode()
cciss: factor out cciss_find_memory_BAR()
cciss: factor out cciss_wait_for_board_ready()
cciss: factor out cciss_find_cfgtables
cciss: fix leak of ioremapped memory
cciss: factor out cciss_find_board_params
cciss: factor out CISS_signature_present()
cciss: factor out cciss_enable_scsi_prefetch()
cciss: factor out cciss_p600_dma_prefetch_quirk()
cciss: cleanup some debug ifdefs
cciss: make cciss_put_controller_into_performant_mode as __devinit
cciss: factor out cciss_wait_for_mode_change_ack()
cciss: factor out cciss_enter_performant_mode
cciss: factor out cciss_find_cfg_addrs.
cciss: factor out cciss_reset_devices()
cciss: fix hard reset code.
cciss: sanitize max commands
cciss: forbid hard reset of 640x boards
cciss: use consistent variable names
cciss: separate cmd_alloc() and cmd_special_alloc()
cciss: change printks to dev_warn, etc.
cciss: cleanup interrupt_not_for_us

Stephen Rothwell (1):
block: fix for block tracing build error

Tejun Heo (2):
bio, fs: update RWA_MASK, READA and SWRITE to match the corresponding BIO_RW_* bits
bio, fs: separate out bio_types.h and define READ/WRITE constants in terms of BIO_RW_* flags

ike Snitzer (1):
block: update request stacking methods to support discards

arch/alpha/include/asm/scatterlist.h | 2 -
arch/avr32/include/asm/scatterlist.h | 2 -
arch/blackfin/include/asm/scatterlist.h | 2 -
arch/cris/include/asm/scatterlist.h | 2 -
arch/frv/include/asm/scatterlist.h | 2 -
arch/h8300/include/asm/scatterlist.h | 2 -
arch/ia64/include/asm/scatterlist.h | 9 -
arch/m32r/include/asm/scatterlist.h | 2 -
arch/m68k/include/asm/scatterlist.h | 3 -
arch/microblaze/include/asm/scatterlist.h | 2 -
arch/mips/include/asm/scatterlist.h | 2 -
arch/mn10300/include/asm/scatterlist.h | 2 -
arch/parisc/include/asm/scatterlist.h | 1 -
arch/powerpc/include/asm/scatterlist.h | 3 -
arch/s390/include/asm/scatterlist.h | 2 -
arch/score/include/asm/scatterlist.h | 2 -
arch/sh/include/asm/scatterlist.h | 2 -
arch/sparc/include/asm/scatterlist.h | 1 -
arch/um/drivers/ubd_kern.c | 7 +-
arch/x86/include/asm/scatterlist.h | 1 -
arch/xtensa/include/asm/scatterlist.h | 2 -
block/blk-barrier.c | 35 +-
block/blk-core.c | 117 ++-
block/blk-exec.c | 2 +-
block/blk-lib.c | 56 +-
block/blk-map.c | 2 +-
block/blk-merge.c | 9 +-
block/blk-settings.c | 17 +
block/blk-sysfs.c | 82 +-
block/blk.h | 6 +-
block/cfq-iosched.c | 21 +-
block/compat_ioctl.c | 56 -
block/elevator.c | 19 +-
block/ioctl.c | 21 +-
drivers/ata/libata-scsi.c | 4 +-
drivers/block/DAC960.c | 13 +-
drivers/block/amiflop.c | 29 +-
drivers/block/aoe/aoeblk.c | 6 +-
drivers/block/ataflop.c | 32 +-
drivers/block/brd.c | 9 +-
drivers/block/cciss.c | 2165 +++++++++++++++++------------
drivers/block/cciss.h | 135 ++-
drivers/block/cciss_cmd.h | 36 +-
drivers/block/cciss_scsi.c | 670 +++++-----
drivers/block/cpqarray.c | 78 +-
drivers/block/drbd/drbd_actlog.c | 8 +-
drivers/block/drbd/drbd_int.h | 16 +-
drivers/block/drbd/drbd_main.c | 102 +--
drivers/block/drbd/drbd_nl.c | 4 -
drivers/block/drbd/drbd_proc.c | 19 +-
drivers/block/drbd/drbd_receiver.c | 135 +--
drivers/block/drbd/drbd_req.c | 2 +-
drivers/block/drbd/drbd_worker.c | 15 +-
drivers/block/floppy.c | 182 +--
drivers/block/hd.c | 2 +-
drivers/block/loop.c | 9 +-
drivers/block/mg_disk.c | 4 +-
drivers/block/nbd.c | 7 +-
drivers/block/osdblk.c | 15 +-
drivers/block/paride/pcd.c | 21 +-
drivers/block/paride/pd.c | 11 +-
drivers/block/paride/pf.c | 26 +-
drivers/block/pktcdvd.c | 20 +-
drivers/block/ps3disk.c | 25 +-
drivers/block/swim.c | 20 +-
drivers/block/swim3.c | 32 +-
drivers/block/ub.c | 35 +-
drivers/block/umem.c | 2 +-
drivers/block/viodasd.c | 21 +-
drivers/block/virtio_blk.c | 86 +-
drivers/block/xd.c | 19 +-
drivers/block/xen-blkfront.c | 403 ++++--
drivers/block/xsysace.c | 8 +-
drivers/block/z2ram.c | 13 +-
drivers/cdrom/cdrom.c | 46 +-
drivers/cdrom/gdrom.c | 48 +-
drivers/cdrom/viocd.c | 106 +-
drivers/ide/ide-atapi.c | 17 +-
drivers/ide/ide-cd.c | 98 +-
drivers/ide/ide-cd_ioctl.c | 2 +-
drivers/ide/ide-disk.c | 18 +-
drivers/ide/ide-disk_ioctl.c | 9 +-
drivers/ide/ide-eh.c | 5 +-
drivers/ide/ide-floppy.c | 27 +-
drivers/ide/ide-floppy_ioctl.c | 12 +-
drivers/ide/ide-gd.c | 19 +-
drivers/ide/ide-io.c | 8 +-
drivers/ide/ide-pm.c | 8 +-
drivers/ide/ide-tape.c | 22 +-
drivers/md/dm-io.c | 12 +-
drivers/md/dm-kcopyd.c | 2 +-
drivers/md/dm-raid1.c | 2 +-
drivers/md/dm-stripe.c | 2 +-
drivers/md/dm.c | 47 +-
drivers/md/linear.c | 2 +-
drivers/md/md.c | 16 +-
drivers/md/md.h | 4 +-
drivers/md/multipath.c | 8 +-
drivers/md/raid0.c | 2 +-
drivers/md/raid1.c | 22 +-
drivers/md/raid10.c | 12 +-
drivers/md/raid5.c | 2 +-
drivers/memstick/core/mspro_block.c | 12 +-
drivers/message/i2o/i2o_block.c | 30 +-
drivers/mmc/card/block.c | 5 +
drivers/mmc/card/queue.c | 4 +-
drivers/mtd/mtd_blkdevs.c | 15 +-
drivers/s390/block/dasd.c | 8 +-
drivers/s390/block/dcssblk.c | 5 +
drivers/s390/char/tape_block.c | 8 +-
drivers/scsi/aha1542.c | 25 -
drivers/scsi/osd/osd_initiator.c | 8 +-
drivers/scsi/scsi_error.c | 25 +-
drivers/scsi/scsi_lib.c | 14 +-
drivers/scsi/sd.c | 126 ++-
drivers/scsi/sd.h | 2 +-
drivers/scsi/sr.c | 25 +-
drivers/scsi/sun3_NCR5380.c | 2 +-
drivers/scsi/sun3_scsi.c | 2 +-
drivers/scsi/sun3_scsi_vme.c | 2 +-
drivers/staging/hv/blkvsc_drv.c | 13 +-
drivers/xen/xenbus/xenbus_client.c | 90 +-
fs/bio.c | 5 +-
fs/block_dev.c | 10 +-
fs/btrfs/disk-io.c | 8 +-
fs/btrfs/inode.c | 6 +-
fs/btrfs/volumes.c | 18 +-
fs/coda/psdev.c | 12 +-
fs/coda/upcall.c | 12 +-
fs/exofs/ios.c | 2 +-
fs/fs-writeback.c | 161 ++-
fs/gfs2/log.c | 4 +-
fs/gfs2/meta_io.c | 8 +-
fs/gfs2/ops_fstype.c | 2 +-
fs/nilfs2/segbuf.c | 2 +-
fs/splice.c | 14 +-
include/linux/Kbuild | 1 +
include/linux/audit.h | 2 +-
include/linux/backing-dev.h | 23 +-
include/linux/bio.h | 158 +--
include/linux/blk_types.h | 193 +++
include/linux/blkdev.h | 142 +--
include/linux/blktrace_api.h | 18 +-
include/linux/coda_psdev.h | 8 +-
include/linux/drbd.h | 2 +-
include/linux/drbd_nl.h | 9 +-
include/linux/fs.h | 45 +-
include/trace/events/block.h | 15 +-
include/trace/events/writeback.h | 159 +++
kernel/power/block_io.c | 2 +-
kernel/trace/blktrace.c | 80 +-
mm/backing-dev.c | 446 +++----
mm/page-writeback.c | 5 +
mm/page_io.c | 2 +-
154 files changed, 4284 insertions(+), 3224 deletions(-)
create mode 100644 include/linux/blk_types.h
create mode 100644 include/trace/events/writeback.h


diff --cc drivers/block/virtio_blk.c
index 23b7c48,7b0f7b6..0000000
--- a/drivers/block/virtio_blk.c
+++ b/drivers/block/virtio_blk.c
@@@ -377,32 -377,11 +388,31 @@@ static int __devinit virtblk_probe(stru
vblk->disk->driverfs_dev = &vdev->dev;
index++;

- /* If barriers are supported, tell block layer that queue is ordered */
- if (virtio_has_feature(vdev, VIRTIO_BLK_F_FLUSH))
+ if (virtio_has_feature(vdev, VIRTIO_BLK_F_FLUSH)) {
+ /*
+ * If the FLUSH feature is supported we do have support for
+ * flushing a volatile write cache on the host. Use that
+ * to implement write barrier support.
+ */
- blk_queue_ordered(q, QUEUE_ORDERED_DRAIN_FLUSH,
- virtblk_prepare_flush);
+ blk_queue_ordered(q, QUEUE_ORDERED_DRAIN_FLUSH);
- else if (virtio_has_feature(vdev, VIRTIO_BLK_F_BARRIER))
+ } else if (virtio_has_feature(vdev, VIRTIO_BLK_F_BARRIER)) {
+ /*
+ * If the BARRIER feature is supported the host expects us
+ * to order request by tags. This implies there is not
+ * volatile write cache on the host, and that the host
+ * never re-orders outstanding I/O. This feature is not
+ * useful for real life scenarious and deprecated.
+ */
- blk_queue_ordered(q, QUEUE_ORDERED_TAG, NULL);
+ blk_queue_ordered(q, QUEUE_ORDERED_TAG);
+ } else {
+ /*
+ * If the FLUSH feature is not supported we must assume that
+ * the host does not perform any kind of volatile write
+ * caching. We still need to drain the queue to provider
+ * proper barrier semantics.
+ */
- blk_queue_ordered(q, QUEUE_ORDERED_DRAIN, NULL);
++ blk_queue_ordered(q, QUEUE_ORDERED_DRAIN);
+ }

/* If disk is read-only in the host, the guest should obey */
if (virtio_has_feature(vdev, VIRTIO_BLK_F_RO))
diff --cc drivers/scsi/scsi_error.c
index 2bf9846,2768bf6..0000000
--- a/drivers/scsi/scsi_error.c
+++ b/drivers/scsi/scsi_error.c
@@@ -307,33 -307,7 +307,33 @@@ static int scsi_check_sense(struct scsi
(sshdr.asc == 0x04) && (sshdr.ascq == 0x02))
return FAILED;

- return NEEDS_RETRY;
+ if (sshdr.asc == 0x3f && sshdr.ascq == 0x0e)
+ scmd_printk(KERN_WARNING, scmd,
+ "Warning! Received an indication that the "
+ "LUN assignments on this target have "
+ "changed. The Linux SCSI layer does not "
+ "automatically remap LUN assignments.\n");
+ else if (sshdr.asc == 0x3f)
+ scmd_printk(KERN_WARNING, scmd,
+ "Warning! Received an indication that the "
+ "operating parameters on this target have "
+ "changed. The Linux SCSI layer does not "
+ "automatically adjust these parameters.\n");
+
- if (blk_barrier_rq(scmd->request))
++ if (scmd->request->cmd_flags & REQ_HARDBARRIER)
+ /*
+ * barrier requests should always retry on UA
+ * otherwise block will get a spurious error
+ */
+ return NEEDS_RETRY;
+ else
+ /*
+ * for normal (non barrier) commands, pass the
+ * UA upwards for a determination in the
+ * completion functions
+ */
+ return SUCCESS;
+
/* these three are not supported */
case COPY_ABORTED:
case VOLUME_OVERFLOW:

--
Jens Axboe


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Next: is nfsd sync or async?