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  1. 19 Jun, 2015 1 commit
  3. 17 Jun, 2015 1 commit
  5. 16 Jun, 2015 8 commits
  7. 10 Jun, 2015 3 commits
  9. 05 Jun, 2015 5 commits
  11. 02 Jun, 2015 2 commits
    • Akinobu Mita's avatar
      null_blk: restart request processing on completion handler · 8b70f45e
      Akinobu Mita authored 
      When irqmode=2 (IRQ completion handler is timer) and queue_mode=1
(Block interface to use is rq), the completion handler should restart
request handling for any pending requests on a queue because request
processing stops when the number of commands are queued more than
hw_queue_depth (null_rq_prep_fn returns BLKPREP_DEFER).

Without this change, the following command cannot finish.

	# modprobe null_blk irqmode=2 queue_mode=1 hw_queue_depth=1
	# fio --name=t --rw=read --size=1g --direct=1 \
	  --ioengine=libaio --iodepth=64 --filename=/dev/nullb0
Signed-off-by: default avatarAkinobu Mita <akinobu.mita@gmail.com>
Cc: Jens Axboe <axboe@fb.com>
Signed-off-by: default avatarJens Axboe <axboe@fb.com>
      8b70f45e
    • Akinobu Mita's avatar
      null_blk: prevent timer handler running on a different CPU where started · 419c21a3
      Akinobu Mita authored 
      When irqmode=2 (IRQ completion handler is timer), timer handler should
be called on the same CPU where the timer has been started.

Since completion_queues are per-cpu and the completion handler only
touches completion_queue for local CPU, we need to prevent the handler
from running on a different CPU where the timer has been started.
Otherwise, the IO cannot be completed until another completion handler
is executed on that CPU.
Signed-off-by: default avatarAkinobu Mita <akinobu.mita@gmail.com>
Cc: Jens Axboe <axboe@fb.com>
Signed-off-by: default avatarJens Axboe <axboe@fb.com>
      419c21a3
  13. 01 Jun, 2015 3 commits
    • Keith Busch's avatar
      NVMe: Remove hctx reliance for multi-namespace · 42483228
      Keith Busch authored 
      The driver needs to track shared tags to support multiple namespaces
that may be dynamically allocated or deleted. Relying on the first
request_queue's hctx's is not appropriate as we cannot clear outstanding
tags for all namespaces using this handle, nor can the driver easily track
all request_queue's hctx as namespaces are attached/detached. Instead,
this patch uses the nvme_dev's tagset to get the shared tag resources
instead of through a request_queue hctx.
Signed-off-by: default avatarKeith Busch <keith.busch@intel.com>
Signed-off-by: default avatarJens Axboe <axboe@fb.com>
      42483228
    • Jens Axboe's avatar
      Merge branch 'for-4.2/core' into for-4.2/drivers · 843e8ddb
      Jens Axboe authored
      843e8ddb
    • Keith Busch's avatar
      blk-mq: Shared tag enhancements · f26cdc85
      Keith Busch authored 
      Storage controllers may expose multiple block devices that share hardware
resources managed by blk-mq. This patch enhances the shared tags so a
low-level driver can access the shared resources not tied to the unshared
h/w contexts. This way the LLD can dynamically add and delete disks and
request queues without having to track all the request_queue hctx's to
iterate outstanding tags.
Signed-off-by: default avatarKeith Busch <keith.busch@intel.com>
Signed-off-by: default avatarJens Axboe <axboe@fb.com>
      f26cdc85
  15. 29 May, 2015 4 commits
  17. 26 May, 2015 1 commit
  19. 22 May, 2015 12 commits
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