From: sashiko-bot@kernel.org
To: "Sahil Chandna" <sahilchandna@linux.microsoft.com>
Cc: linux-hyperv@vger.kernel.org, linux-pci@vger.kernel.org
Subject: Re: [PATCH v3] PCI: hv: Warn when wait_for_response() waits indefinitely
Date: Tue, 08 Sep 2026 11:38:22 +0000 [thread overview]
Message-ID: <20260908113822.82BB91F00A3D@smtp.kernel.org> (raw)
In-Reply-To: <20260908113009.3005964-1-sahilchandna@linux.microsoft.com>
> A guest can wait indefinitely in wait_for_response() for the host to
> send either a rescind message or a packet completion. If the
> host does not send either, the guest can remain blocked with no
> diagnostic indicating a reason.
> This was observed during a guest kernel upgrade in which the
> host-side application handling the PCI channel faulted, causing the
> guest to never receive the completion request.
> Add a warning in wait_for_response() when the wait exceeds
> a timeout so that such a hang is visible in the guest's kernel log
> and can be correlated with host-side state.
>
> Suggested-by: Michael Kelley <mhklinux@outlook.com>
> Signed-off-by: Sahil Chandna <sahilchandna@linux.microsoft.com>
Sashiko has reviewed this patch and found no issues. It looks great!
--
Sashiko AI review · https://sashiko.dev/#/patchset/20260908113009.3005964-1-sahilchandna@linux.microsoft.com?part=1
next prev parent reply other threads:[~2026-09-08 11:38 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-08 11:30 [PATCH v3] PCI: hv: Warn when wait_for_response() waits indefinitely Sahil Chandna
2026-09-08 11:38 ` sashiko-bot [this message]
2026-09-09 9:31 ` Naman Jain
2026-09-11 10:29 ` Manivannan Sadhasivam
2026-09-13 22:39 ` Wei Liu
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