[PATCH V3 0/8] nvme: pci: fix & improve timeout handling

Ming Lei
2018-05-03T03:17:08Z

Hi,

The 1st patch introduces blk_quiesce_timeout() and blk_unquiesce_timeout()
for NVMe, meantime fixes blk_sync_queue().

The 2nd patch covers timeout for admin commands for recovering controller
for avoiding possible deadlock.

The 3~5 patches fixes race between nvme_start_freeze() and
nvme_unfreeze().

The last 3 patches fixes several races wrt. NVMe timeout handler, and
finally can make blktests block/011 passed. Meantime the NVMe timeout
model gets simplified a lot.

gitweb:
https://github.com/ming1/linux/commits/v4.17-rc-nvme-timeout.V3

V3:
- fix one new race related freezing in patch 4, nvme_reset_work()
may hang forever without this patch
- rewrite the last 3 patches, and avoid to break nvme_reset_ctrl*()

V2:
- fix draining timeout work, so no need to change return value from
.timeout()
- fix race between nvme_start_freeze() and nvme_unfreeze()
- cover timeout for admin commands running in EH

Ming Lei (8):
block: introduce blk_quiesce_timeout() and blk_unquiesce_timeout()
nvme: pci: cover timeout for admin commands running in EH
nvme: pci: only wait freezing if queue is frozen
nvme: pci: freeze queue in nvme_dev_disable() in case of error
recovery
nvme: fix race between freeze queues and unfreeze queues
nvme: pci: split controller resetting into two parts
nvme: pci: recover controller reliably
nvme: pci: simplify timeout handling

block/blk-core.c | 21 ++-
block/blk-mq.c | 9 ++
block/blk-timeout.c | 5 +-
drivers/nvme/host/core.c | 47 ++++++-
drivers/nvme/host/nvme.h | 6 +
drivers/nvme/host/pci.c | 344 ++++++++++++++++++++++++++++++++++++++++-------
include/linux/blkdev.h | 13 ++
7 files changed, 391 insertions(+), 54 deletions(-)

Cc: Jianchao Wang <jianchao.w.wang@oracle.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Sagi Grimberg <sagi@grimberg.me>
Cc: linux-nvme@lists.infradead.org
Cc: Laurence Oberman <loberman@redhat.com>

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