From: Christoph Hellwig <hch@lst.de>
To: Daniel Wagner <dwagner@suse.de>
Cc: linux-nvme@lists.infradead.org, linux-kernel@vger.kernel.org,
Christoph Hellwig <hch@lst.de>, Sagi Grimberg <sagi@grimberg.me>,
Keith Busch <kbusch@kernel.org>,
James Smart <james.smart@broadcom.com>,
Hannes Reinecke <hare@suse.de>
Subject: Re: [PATCH v3 06/16] nvme-fc: Do not wait in vain when unloading module
Date: Tue, 19 Dec 2023 05:35:14 +0100 [thread overview]
Message-ID: <20231219043514.GG30580@lst.de> (raw)
In-Reply-To: <20231218153105.12717-7-dwagner@suse.de>
On Mon, Dec 18, 2023 at 04:30:54PM +0100, Daniel Wagner wrote:
> The module unload code will wait for a controller to be delete even when
> there is no controller and we wait for completion forever to happen.
> Thus only wait for the completion when there is a controller which
> needs to be removed.
This whole code looks fishy to me, and I suspect this patch only papers
over it. Why do we this wait to start with? If we've found that out and
documented it, the code really should be using a wait_event variant that
checks for the actual condition (no more controllers), because without
that you might still have a race otherwise.
next prev parent reply other threads:[~2023-12-19 4:35 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-12-18 15:30 [PATCH v3 00/17] enable nvmet-fc for blktests Daniel Wagner
2023-12-18 15:30 ` [PATCH v3 01/16] nvmet: report ioccsz and iorcsz for disc ctrl Daniel Wagner
2023-12-19 4:27 ` Christoph Hellwig
2023-12-20 0:50 ` Max Gurtovoy
2023-12-19 7:24 ` Hannes Reinecke
2023-12-19 15:15 ` Daniel Wagner
2023-12-18 15:30 ` [PATCH v3 02/16] nvmet-fc: remove unnecessary bracket Daniel Wagner
2023-12-19 4:27 ` Christoph Hellwig
2023-12-19 7:25 ` Hannes Reinecke
2023-12-18 15:30 ` [PATCH v3 03/16] nvmet-trace: avoid dereferencing pointer too early Daniel Wagner
2023-12-19 4:29 ` Christoph Hellwig
2023-12-18 15:30 ` [PATCH v3 04/16] nvmet-trace: null terminate device name string correctly Daniel Wagner
2023-12-19 4:29 ` Christoph Hellwig
2023-12-18 15:30 ` [PATCH v3 05/16] nvmet-fcloop: Remove remote port from list when unlinking Daniel Wagner
2023-12-19 4:31 ` Christoph Hellwig
2023-12-19 7:26 ` Hannes Reinecke
2023-12-18 15:30 ` [PATCH v3 06/16] nvme-fc: Do not wait in vain when unloading module Daniel Wagner
2023-12-19 4:35 ` Christoph Hellwig [this message]
2024-01-05 5:05 ` Keith Busch
2023-12-19 7:28 ` Hannes Reinecke
2023-12-18 15:30 ` [PATCH v3 07/16] nvmet-fc: Release reference on target port Daniel Wagner
2023-12-19 4:36 ` Christoph Hellwig
2023-12-19 7:28 ` Hannes Reinecke
2023-12-18 15:30 ` [PATCH v3 08/16] nvmet-fc: untangle cross refcounting objects Daniel Wagner
2023-12-19 5:16 ` Christoph Hellwig
2023-12-21 9:15 ` Daniel Wagner
2024-01-26 15:32 ` Daniel Wagner
2023-12-19 7:59 ` Hannes Reinecke
2023-12-18 15:30 ` [PATCH v3 09/16] nvmet-fc: free queue and assoc directly Daniel Wagner
2023-12-19 7:59 ` Hannes Reinecke
2023-12-18 15:30 ` [PATCH v3 10/16] nvmet-fc: hold reference on hostport match Daniel Wagner
2023-12-19 8:00 ` Hannes Reinecke
2023-12-18 15:30 ` [PATCH v3 11/16] nvmet-fc: remove null hostport pointer check Daniel Wagner
2023-12-19 11:37 ` Hannes Reinecke
2023-12-18 15:31 ` [PATCH v3 12/16] nvmet-fc: do not tack refs on tgtports from assoc Daniel Wagner
2023-12-19 11:38 ` Hannes Reinecke
2023-12-18 15:31 ` [PATCH v3 13/16] nvmet-fc: abort command if when there is binding Daniel Wagner
2023-12-19 11:39 ` Hannes Reinecke
2023-12-18 15:31 ` [PATCH v3 14/16] nvmet-fc: free hostport after release reference to tgtport Daniel Wagner
2023-12-19 11:41 ` Hannes Reinecke
2023-12-18 15:31 ` [PATCH v3 15/16] nvmet-fc: avoid deadlock on delete association path Daniel Wagner
2023-12-19 6:00 ` kernel test robot
2023-12-19 8:29 ` kernel test robot
2023-12-19 11:17 ` kernel test robot
2023-12-19 11:43 ` Hannes Reinecke
2023-12-18 15:31 ` [PATCH v3 16/16] nvmet-fc: take ref count on tgtport before delete assoc Daniel Wagner
2023-12-19 11:47 ` Hannes Reinecke
2023-12-18 15:31 ` [PATCH v3 17/17] nvmet-fc: add extensive debug logging Daniel Wagner
2023-12-19 11:54 ` Hannes Reinecke
2023-12-19 14:06 ` Daniel Wagner
2023-12-18 16:10 ` [PATCH v3 00/17] enable nvmet-fc for blktests Maurizio Lombardi
2024-01-02 21:36 ` Keith Busch
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