From: sagi@grimberg.me (Sagi Grimberg)
Subject: [PATCHv4 1/4] nvme: Sync request queues on reset
Date: Mon, 16 Jul 2018 17:51:47 +0300 [thread overview]
Message-ID: <c0752e20-7d23-4b1f-b128-af952e3cf8da@grimberg.me> (raw)
In-Reply-To: <20180713205609.19701-2-keith.busch@intel.com>
Keith,
> This patch fixes races that occur with simultaneous controller
> resets by synchronizing request queues prior to initializing the
> controller. Withouth this, a thread may attempt disabling a controller
> at the same time as we're trying to enable it.
I'll need a little more help with this. This is due to the
fact that we disable the controller directly from the timeout
handler? If not, what context may disable when nvme_reset_work
is running?
I'm trying what the sync should serialize and why is it not
serialized by the controller state machine.
next prev parent reply other threads:[~2018-07-16 14:51 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-13 20:56 [PATCHv4 0/4] nvme timeout updates Keith Busch
2018-07-13 20:56 ` [PATCHv4 1/4] nvme: Sync request queues on reset Keith Busch
2018-07-16 8:52 ` jianchao.wang
2018-07-16 10:39 ` Ming Lei
2018-07-16 13:30 ` Keith Busch
2018-07-17 5:37 ` jianchao.wang
2018-07-16 14:51 ` Sagi Grimberg [this message]
2018-07-16 15:37 ` Keith Busch
2018-07-16 16:36 ` Sagi Grimberg
2018-07-16 17:12 ` Keith Busch
2018-07-17 13:40 ` Christoph Hellwig
2018-07-17 14:54 ` Keith Busch
2018-07-18 11:46 ` Sagi Grimberg
2018-07-18 13:52 ` Keith Busch
2018-07-13 20:56 ` [PATCHv4 2/4] nvme: Start controller in own work queue Keith Busch
2018-07-16 15:00 ` Sagi Grimberg
2018-07-16 15:35 ` Keith Busch
2018-07-13 20:56 ` [PATCHv4 3/4] nvme: Introduce frozen controller state Keith Busch
2018-07-16 9:02 ` jianchao.wang
2018-07-16 11:09 ` Ming Lei
2018-07-16 13:36 ` Keith Busch
2018-07-17 1:23 ` Ming Lei
2018-07-17 5:49 ` jianchao.wang
2018-07-17 7:21 ` Ming Lei
2018-07-17 7:28 ` jianchao.wang
2018-07-17 14:32 ` Keith Busch
2018-07-18 2:57 ` jianchao.wang
2018-07-17 14:06 ` Keith Busch
2018-07-16 16:34 ` Sagi Grimberg
2018-07-17 16:05 ` James Smart
2018-07-17 16:17 ` Keith Busch
2018-07-18 12:20 ` Sagi Grimberg
2018-07-18 13:53 ` Keith Busch
2018-07-13 20:56 ` [PATCHv4 4/4] nvme-pci: Use controller start work to dispath IO Keith Busch
2018-07-19 19:48 ` [PATCHv4 0/4] nvme timeout updates Scott Bauer
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