From: David Matlack <dmatlack@google.com>
To: Alex Williamson <alex.williamson@nvidia.com>
Cc: Alex Williamson <alex@shazbot.org>, kvm <kvm@vger.kernel.org>,
linux-kernel <linux-kernel@vger.kernel.org>,
Jason Gunthorpe <jgg@ziepe.ca>, Kevin Tian <kevin.tian@intel.com>,
Yi Liu <yi.l.liu@intel.com>
Subject: Re: [PATCH 4/4] selftests/vfio: Extend timeout for runner executions
Date: Wed, 9 Sep 2026 21:51:58 +0000 [thread overview]
Message-ID: <aqHU_nqICBENMI7B@google.com> (raw)
In-Reply-To: <20260901215358.2421359-5-alex.williamson@nvidia.com>
On 2026-09-01 03:53 PM, Alex Williamson wrote:
> When executed via the runner, ie. run_kselftest.sh, tests are subject
> to a default 45s timeout. None of the igb, ioatdma, or nv_falcon
> drivers can run the vfio_pci_driver_test within this window.
>
> The igb driver is the worst due to the device getting wedged from bad
> DMAs in mix_and_match and requiring the full transaction pending
> delay prior to FLR.
>
> This is even further exacerbated when the system implements
> firmware-first error handling and the transaction pending scheduled
> delays are preempted beyond expectations by SMIs.
>
> Worst case observed runtime for the whole vfio_pci_driver_test on
> such a setup is 450s. Round up to 600s.
>
> Assisted-by: GPT-5.5
> Signed-off-by: Alex Williamson <alex.williamson@nvidia.com>
Reviewed-by: David Matlack <dmatlack@google.com>
prev parent reply other threads:[~2026-09-09 21:52 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-01 21:53 [PATCH 0/4] vfio: Fix cdev second-open and harden selftests Alex Williamson
2026-09-01 21:53 ` [PATCH 1/4] vfio: Reject a second cdev open before mutating shared device state Alex Williamson
2026-09-09 22:27 ` David Matlack
2026-09-10 13:51 ` Jason Gunthorpe
2026-09-01 21:53 ` [PATCH 2/4] selftests/vfio: Wait out transient -EBUSY on open/bind Alex Williamson
2026-09-09 21:40 ` David Matlack
2026-09-10 22:50 ` Alex Williamson
2026-09-01 21:53 ` [PATCH 3/4] selftests/vfio: Extend mix_and_match timeout to 90s Alex Williamson
2026-09-09 21:42 ` David Matlack
2026-09-01 21:53 ` [PATCH 4/4] selftests/vfio: Extend timeout for runner executions Alex Williamson
2026-09-09 21:51 ` David Matlack [this message]
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