From: hch@lst.de (Christoph Hellwig)
Subject: [PATCH v2 3/3] nvme-rdma: wait for local invalidation before completing a request
Date: Thu, 9 Nov 2017 10:39:45 +0100 [thread overview]
Message-ID: <20171109093945.GB17515@lst.de> (raw)
In-Reply-To: <20171108100616.26605-4-sagi@grimberg.me>
On Wed, Nov 08, 2017@12:06:16PM +0200, Sagi Grimberg wrote:
> We must not complete a request before the host memory region is
> invalidated. Luckily we have send with invalidate protocol support
> so we usually don't need to execute it, but in case the target
> did not invalidate a memory region for us, we must wait for
> the invalidation to complete before unmapping host memory and
> completing the I/O.
Looks good, but a change to atomic bitops would require a respin
here as well.
WARNING: multiple messages have this Message-ID (diff)
From: Christoph Hellwig <hch-jcswGhMUV9g@public.gmane.org>
To: Sagi Grimberg <sagi-NQWnxTmZq1alnMjI0IkVqw@public.gmane.org>
Cc: linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-nvme-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
Christoph Hellwig <hch-jcswGhMUV9g@public.gmane.org>,
Max Gurtuvoy <maxg-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
Subject: Re: [PATCH v2 3/3] nvme-rdma: wait for local invalidation before completing a request
Date: Thu, 9 Nov 2017 10:39:45 +0100 [thread overview]
Message-ID: <20171109093945.GB17515@lst.de> (raw)
In-Reply-To: <20171108100616.26605-4-sagi-NQWnxTmZq1alnMjI0IkVqw@public.gmane.org>
On Wed, Nov 08, 2017 at 12:06:16PM +0200, Sagi Grimberg wrote:
> We must not complete a request before the host memory region is
> invalidated. Luckily we have send with invalidate protocol support
> so we usually don't need to execute it, but in case the target
> did not invalidate a memory region for us, we must wait for
> the invalidation to complete before unmapping host memory and
> completing the I/O.
Looks good, but a change to atomic bitops would require a respin
here as well.
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next prev parent reply other threads:[~2017-11-09 9:39 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-11-08 10:06 [PATCH v2 0/3] Fix request completion holes Sagi Grimberg
2017-11-08 10:06 ` Sagi Grimberg
2017-11-08 10:06 ` [PATCH v2 1/3] nvme-rdma: don't suppress send completions Sagi Grimberg
2017-11-08 10:06 ` Sagi Grimberg
2017-11-09 9:18 ` Christoph Hellwig
2017-11-09 9:18 ` Christoph Hellwig
2017-11-09 11:08 ` Sagi Grimberg
2017-11-09 11:08 ` Sagi Grimberg
2017-11-20 8:18 ` Christoph Hellwig
2017-11-20 8:18 ` Christoph Hellwig
2017-11-20 8:33 ` Sagi Grimberg
2017-11-20 8:33 ` Sagi Grimberg
2017-11-20 9:32 ` Christoph Hellwig
2017-11-20 9:32 ` Christoph Hellwig
2017-11-08 10:06 ` [PATCH v2 2/3] nvme-rdma: don't complete requests before a send work request has completed Sagi Grimberg
2017-11-08 10:06 ` Sagi Grimberg
2017-11-09 9:21 ` Christoph Hellwig
2017-11-09 9:21 ` Christoph Hellwig
2017-11-09 11:14 ` Sagi Grimberg
2017-11-09 11:14 ` Sagi Grimberg
2017-11-20 8:31 ` Christoph Hellwig
2017-11-20 8:31 ` Christoph Hellwig
2017-11-20 8:37 ` Sagi Grimberg
2017-11-20 8:37 ` Sagi Grimberg
2017-11-20 8:41 ` Christoph Hellwig
2017-11-20 8:41 ` Christoph Hellwig
2017-11-20 9:04 ` Sagi Grimberg
2017-11-20 9:04 ` Sagi Grimberg
2017-11-20 9:28 ` Sagi Grimberg
2017-11-20 9:28 ` Sagi Grimberg
2017-11-20 10:49 ` Christoph Hellwig
2017-11-20 10:49 ` Christoph Hellwig
2017-11-20 11:12 ` Sagi Grimberg
2017-11-20 11:12 ` Sagi Grimberg
2017-11-20 11:16 ` Christoph Hellwig
2017-11-20 11:16 ` Christoph Hellwig
2017-11-08 10:06 ` [PATCH v2 3/3] nvme-rdma: wait for local invalidation before completing a request Sagi Grimberg
2017-11-08 10:06 ` Sagi Grimberg
2017-11-09 9:39 ` Christoph Hellwig [this message]
2017-11-09 9:39 ` Christoph Hellwig
2017-11-13 22:10 ` [PATCH v2 0/3] Fix request completion holes Doug Ledford
2017-11-13 22:10 ` Doug Ledford
2017-11-16 15:39 ` Sagi Grimberg
2017-11-16 15:39 ` Sagi Grimberg
2017-11-16 15:58 ` Doug Ledford
2017-11-16 15:58 ` Doug Ledford
2017-11-20 7:37 ` Christoph Hellwig
2017-11-20 7:37 ` Christoph Hellwig
2017-11-20 8:33 ` Sagi Grimberg
2017-11-20 8:33 ` Sagi Grimberg
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