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  1. 06 6月, 2015 1 次提交
    • K
      NVMe: add sysfs and ioctl controller reset · 4cc06521
      由 Keith Busch 提交于 
      We need the ability to perform an nvme controller reset as discussed on
the mailing list thread:

  http://lists.infradead.org/pipermail/linux-nvme/2015-March/001585.html

This adds a sysfs entry that when written to will reset perform an NVMe
controller reset if the controller was successfully initialized in the
first place.

This also adds locking around resetting the device in the async probe
method so the driver can't schedule two resets.
Signed-off-by: NKeith Busch <keith.busch@intel.com>
Cc: Brandon Schultz <brandon.schulz@hgst.com>
Cc: David Sariel <david.sariel@pmcs.com>

Updated by Jens to:

1) Merge this with the ioctl reset patch from David Sariel. The ioctl
   path now shares the reset code from the sysfs path.

2) Don't flush work if we fail issuing the reset.
Signed-off-by: NJens Axboe <axboe@fb.com>
      4cc06521
  3. 02 6月, 2015 3 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
  5. 30 5月, 2015 2 次提交
  7. 23 5月, 2015 1 次提交
  9. 22 5月, 2015 11 次提交
  11. 20 5月, 2015 6 次提交
  13. 19 5月, 2015 3 次提交
  15. 06 5月, 2015 8 次提交
  17. 04 5月, 2015 1 次提交
  19. 02 5月, 2015 1 次提交
    • I
      rbd: end I/O the entire obj_request on error · 082a75da
      由 Ilya Dryomov 提交于 
      When we end I/O struct request with error, we need to pass
obj_request->length as @nr_bytes so that the entire obj_request worth
of bytes is completed.  Otherwise block layer ends up confused and we
trip on

    rbd_assert(more ^ (which == img_request->obj_request_count));

in rbd_img_obj_callback() due to more being true no matter what.  We
already do it in most cases but we are missing some, in particular
those where we don't even get a chance to submit any obj_requests, due
to an early -ENOMEM for example.

A number of obj_request->xferred assignments seem to be redundant but
I haven't touched any of obj_request->xferred stuff to keep this small
and isolated.

Cc: Alex Elder <elder@linaro.org>
Cc: stable@vger.kernel.org # 3.10+
Reported-by: NShawn Edwards <lesser.evil@gmail.com>
Reviewed-by: NSage Weil <sage@redhat.com>
Signed-off-by: NIlya Dryomov <idryomov@gmail.com>
      082a75da
  21. 01 5月, 2015 3 次提交