From: Guixin Liu <kanie@linux.alibaba.com>
To: Sagi Grimberg <sagi@grimberg.me>, Keith Busch <kbusch@kernel.org>
Cc: hch@lst.de, kch@nvidia.com, linux-nvme@lists.infradead.org
Subject: Re: [PATCH v7 1/1] nvmet: support reservation feature
Date: Thu, 7 Mar 2024 17:42:39 +0800 [thread overview]
Message-ID: <97fcbc6b-0bd4-4dad-808d-11804e97b397@linux.alibaba.com> (raw)
In-Reply-To: <6e34a652-da40-46f2-8a43-b45b08682e41@grimberg.me>
在 2024/3/7 17:27, Sagi Grimberg 写道:
> unlike abort, preempt-and-abort needs a semantic guarantee because the
> consumer
> may rely on this for fencing purposes. So it cannot be supported in
> "best effort" I think.
>
> A possible implementation would be not to abort as there is no such
> interface, but
> nvmet may wait for all pending ns IO to complete and disallowing new
> IO to come in
> (using percpu_ref_kill and percpu_ref_resurrect on ns->ref). This
> won't work very efficiently
> withALL_REGS reservations though.
I will think deeply，and send a v9 patch.
Best regards,
Guixin Liu
next prev parent reply other threads:[~2024-03-07 9:42 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-01 2:32 [PATCH v7 0/1] Implement the NVMe reservation feature Guixin Liu
2024-02-01 2:32 ` [PATCH v7 1/1] nvmet: support " Guixin Liu
2024-02-28 0:40 ` Sagi Grimberg
2024-02-28 2:21 ` Guixin Liu
2024-02-28 3:21 ` Keith Busch
2024-02-28 3:40 ` Guixin Liu
2024-03-07 9:27 ` Sagi Grimberg
2024-03-07 9:42 ` Guixin Liu [this message]
2024-03-08 9:15 ` Guixin Liu
2024-03-08 10:07 ` Sagi Grimberg
2024-03-11 11:19 ` Guixin Liu
2024-03-12 21:31 ` Sagi Grimberg
2024-03-13 3:42 ` Guixin Liu
2024-03-13 9:54 ` Sagi Grimberg
2024-03-13 11:56 ` Guixin Liu
2024-03-13 12:36 ` Sagi Grimberg
2024-03-14 2:03 ` Guixin Liu
2024-03-19 2:59 ` Chaitanya Kulkarni
2024-03-19 3:19 ` Guixin Liu
2024-03-20 1:59 ` hch
2024-03-20 9:16 ` Sagi Grimberg
2024-03-21 8:06 ` Chaitanya Kulkarni
2024-03-21 21:02 ` hch
2024-03-22 9:34 ` Chaitanya Kulkarni
2024-03-23 20:41 ` Sagi Grimberg
2024-02-18 2:12 ` [PATCH v7 0/1] Implement the NVMe " Guixin Liu
2024-02-26 6:33 ` Guixin Liu
2024-02-26 6:43 ` Chaitanya Kulkarni
2024-02-29 2:57 ` Guixin Liu
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