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From: Keith Busch <kbusch@kernel.org>
To: Sagi Grimberg <sagi@grimberg.me>
Cc: Edmund Nadolski <edmund.nadolski@intel.com>,
	Christoph Hellwig <hch@lst.de>,
	linux-nvme@lists.infradead.org,
	James Smart <james.smart@broadcom.com>
Subject: Re: [PATCHv2 0/6] nvme: double reset prevention
Date: Fri, 20 Sep 2019 11:54:54 -0600	[thread overview]
Message-ID: <20190920175454.GB97854@C02WT3WMHTD6> (raw)
In-Reply-To: <6f31bc09-95d3-bf11-7846-e57d8600462d@grimberg.me>

On Fri, Sep 20, 2019 at 10:51:52AM -0700, Sagi Grimberg wrote:
> 
> > The main objective of this series is to prevent double resets. This sort
> > of thing is known to have happened if a timeout occurs at roughly the same time
> > as a user intiated reset, like through through PCIe's FLR.
> > 
> > The double reset could happen because the controller disabling had been
> > occuring outside of the RESETTING state when we can't schedule the
> > reset_work, which is to occur later. When another reset schedules in
> > between these events, the controller ends up in the wrong state.
> > 
> > The end result of this series is simply to block subsequent resets by
> > initializing the controller state to RESETTING without actually
> > scheduling the reset_work. The first patches in this series are simply
> 
> are simply what?

Oops, cut off my message.

Simply fixing issues discovered while testing the changes.

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  reply	other threads:[~2019-09-20 17:55 UTC|newest]

Thread overview: 41+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-09-19 21:34 [PATCHv2 0/6] nvme: double reset prevention kbusch
2019-09-19 21:34 ` [PATCHv2 1/6] nvme-pci: Free tagset if no IO queues kbusch
2019-09-20 17:49   ` Sagi Grimberg
2019-09-20 17:53     ` Keith Busch
2019-09-20 17:56       ` Sagi Grimberg
2019-09-27 21:33   ` Christoph Hellwig
2019-09-19 21:34 ` [PATCHv2 2/6] nvme: Remove ADMIN_ONLY state kbusch
2019-09-20 17:53   ` Sagi Grimberg
2019-09-27 21:35   ` Christoph Hellwig
2019-09-19 21:34 ` [PATCHv2 3/6] nvme: Restart request timers in resetting state kbusch
2019-09-20 17:53   ` Sagi Grimberg
2019-09-27 21:36   ` Christoph Hellwig
2019-09-19 21:34 ` [PATCHv2 4/6] nvme: Introduce nvme_reset_continue kbusch
2019-09-20 18:15   ` Sagi Grimberg
2019-09-27 21:37   ` Christoph Hellwig
2019-09-27 21:44   ` Christoph Hellwig
2019-09-19 21:34 ` [PATCHv2 5/6] nvme: Prevent resets during paused states kbusch
2019-09-20 18:03   ` Sagi Grimberg
2019-09-20 18:05   ` Sagi Grimberg
2019-09-20 18:08     ` Keith Busch
2019-09-20 18:14       ` Sagi Grimberg
2019-09-27 21:41   ` Christoph Hellwig
2019-09-28  0:23     ` Keith Busch
2019-10-10 12:03       ` Judy Brock
2019-10-10 13:59         ` Keith Busch
2019-10-10 14:03           ` Christoph Hellwig
2019-10-11  0:51           ` Judy Brock
2019-10-11 14:23             ` Keith Busch
2019-09-19 21:34 ` [PATCHv2 6/6] nvme: Wait for reset state when required kbusch
2019-09-20 18:13   ` Sagi Grimberg
2019-09-20 18:26     ` Keith Busch
2019-09-20 19:29       ` Keith Busch
2019-09-20 20:49         ` Sagi Grimberg
2019-09-20 21:06           ` Keith Busch
2019-09-27 21:43   ` Christoph Hellwig
2019-09-20 17:51 ` [PATCHv2 0/6] nvme: double reset prevention Sagi Grimberg
2019-09-20 17:54   ` Keith Busch [this message]
2019-09-23 22:09 ` Sagi Grimberg
2019-09-24 15:07   ` Keith Busch
2019-09-24 18:07     ` Sagi Grimberg
2019-09-24 18:12       ` Keith Busch

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