From: keith.busch@linux.intel.com (Keith Busch)
Subject: [PATCHv3 1/9] nvme: Sync request queues on reset
Date: Fri, 25 May 2018 12:30:50 -0600 [thread overview]
Message-ID: <20180525183050.GU11037@localhost.localdomain> (raw)
In-Reply-To: <7f88c98a-652f-4a82-0f0b-feb36fe46bb0@broadcom.com>
On Fri, May 25, 2018@11:04:47AM -0700, James Smart wrote:
> On 5/25/2018 9:24 AM, Keith Busch wrote:
> >
> > At least in the current blk-mq timeout handling, returning RESET_TIMER
> > presents other challenges for the reset handler: the timer may have
> > reclaimed the request that reset_work is trying to complete.
>
> why would that be true if BLK_EH_RESET_TIMER was returned ?
That return rearms the timer for triggering timeout handling, and
when that timeout handling triggers, your reset work won't be able to
complete the request. You're basically relying on the timer being high
enough that your reset work beats the timer to the completion. That may
be sufficient in practice most of the time.
next prev parent reply other threads:[~2018-05-25 18:30 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-24 20:34 [PATCHv3 0/9] nvme timeout fixes, v3 Keith Busch
2018-05-24 20:34 ` [PATCHv3 1/9] nvme: Sync request queues on reset Keith Busch
2018-05-25 12:42 ` Christoph Hellwig
2018-05-25 14:22 ` Keith Busch
2018-05-25 14:32 ` Christoph Hellwig
2018-05-25 14:45 ` Keith Busch
2018-05-25 15:56 ` James Smart
2018-05-25 16:24 ` Keith Busch
2018-05-25 18:04 ` James Smart
2018-05-25 18:30 ` Keith Busch [this message]
2018-05-30 23:25 ` Sagi Grimberg
2018-06-05 16:25 ` Keith Busch
2018-05-30 23:24 ` Sagi Grimberg
2018-05-24 20:34 ` [PATCHv3 2/9] nvme-pci: Fix queue freeze criteria " Keith Busch
2018-05-25 12:43 ` Christoph Hellwig
2018-05-30 23:36 ` Sagi Grimberg
2018-05-24 20:34 ` [PATCHv3 3/9] nvme: Move all IO out of controller reset Keith Busch
2018-05-25 13:00 ` Christoph Hellwig
2018-05-25 14:41 ` Keith Busch
2018-05-24 20:34 ` [PATCHv3 4/9] nvme-pci: Rate limit the nvme timeout warnings Keith Busch
2018-05-25 13:01 ` Christoph Hellwig
2018-05-30 6:06 ` Christoph Hellwig
2018-05-24 20:34 ` [PATCHv3 5/9] nvme-pci: End IO requests in CONNECTING state Keith Busch
2018-05-24 20:47 ` Christoph Hellwig
2018-05-24 21:03 ` Keith Busch
2018-05-25 12:31 ` Christoph Hellwig
2018-05-24 20:34 ` [PATCHv3 6/9] nvme-pci: Unquiesce dead controller queues Keith Busch
2018-05-25 13:03 ` Christoph Hellwig
2018-05-24 20:34 ` [PATCHv3 7/9] nvme-pci: Attempt reset retry for IO failures Keith Busch
2018-05-25 13:04 ` Christoph Hellwig
2018-05-25 14:25 ` Keith Busch
2018-05-30 23:40 ` Sagi Grimberg
2018-06-04 22:46 ` Keith Busch
2018-05-24 20:34 ` [PATCHv3 8/9] nvme-pci: Queue creation error handling Keith Busch
2018-05-25 12:35 ` Christoph Hellwig
2018-06-05 16:28 ` Keith Busch
2018-05-30 23:37 ` Sagi Grimberg
2018-05-24 20:35 ` [PATCHv3 9/9] nvme-pci: Don't wait for HMB completion on shutdown Keith Busch
2018-05-24 20:45 ` Christoph Hellwig
2018-05-24 21:15 ` Keith Busch
2018-05-25 3:10 ` jianchao.wang
2018-05-25 15:09 ` Keith Busch
2018-05-25 12:36 ` Christoph Hellwig
2018-07-13 0:48 ` [PATCHv3 0/9] nvme timeout fixes, v3 Ming Lei
2018-07-13 20:54 ` Keith Busch
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