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  1. 11 6月, 2015 3 次提交
  3. 06 6月, 2015 5 次提交
  5. 02 6月, 2015 5 次提交
    • A
      null_blk: restart request processing on completion handler · 8b70f45e
      由 Akinobu Mita 提交于 
      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: NAkinobu Mita <akinobu.mita@gmail.com>
Cc: Jens Axboe <axboe@fb.com>
Signed-off-by: NJens Axboe <axboe@fb.com>
      8b70f45e
    • A
      null_blk: prevent timer handler running on a different CPU where started · 419c21a3
      由 Akinobu Mita 提交于 
      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: NAkinobu Mita <akinobu.mita@gmail.com>
Cc: Jens Axboe <axboe@fb.com>
Signed-off-by: NJens Axboe <axboe@fb.com>
      419c21a3
    • K
      NVMe: Remove hctx reliance for multi-namespace · 42483228
      由 Keith Busch 提交于 
      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: NKeith Busch <keith.busch@intel.com>
Signed-off-by: NJens Axboe <axboe@fb.com>
      42483228
    • J
      Merge branch 'for-4.2/core' into for-4.2/drivers · 843e8ddb
      由 Jens Axboe 提交于
      843e8ddb
    • K
      blk-mq: Shared tag enhancements · f26cdc85
      由 Keith Busch 提交于 
      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: NKeith Busch <keith.busch@intel.com>
Signed-off-by: NJens Axboe <axboe@fb.com>
      f26cdc85
  7. 30 5月, 2015 4 次提交
  9. 27 5月, 2015 1 次提交
  11. 23 5月, 2015 1 次提交
  13. 22 5月, 2015 11 次提交
  15. 20 5月, 2015 9 次提交
  17. 19 5月, 2015 1 次提交