From: Jason Gunthorpe <jgg@nvidia.com>
To: Bjorn Helgaas <helgaas@kernel.org>
Cc: "yuan.gao" <yuan.gao@ucloud.cn>,
Bjorn Helgaas <bhelgaas@google.com>,
linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org,
Alex Williamson <alex@shazbot.org>
Subject: Re: [PATCH] PCI: Avoid FLR for NVIDIA 5090 GPU
Date: Thu, 16 Apr 2026 19:37:54 -0300 [thread overview]
Message-ID: <20260416223754.GC761338@nvidia.com> (raw)
In-Reply-To: <20260416173100.GA13378@bhelgaas>
On Thu, Apr 16, 2026 at 12:31:00PM -0500, Bjorn Helgaas wrote:
> On Thu, Apr 16, 2026 at 03:07:06PM +0800, yuan.gao wrote:
> > When passing through the NVIDIA 5090 GPU to a vm, there is a certain
> > probability of encountering an flr timeout during vm shutdown, which
> > subsequently leads to a soft lock of the host cpu.
>
> If possible, would like confirmation of device erratum from Nvidia.
> If there's no known erratum, there might be something wrong in the
> Linux FLR and wait.
I asked and was told there is a known device firmware defect that
causes this.
So blanket disabling FLR without detecting good and bad FW is not a
good idea.
I suggest Yuan try to use an NVIDIA support channel to try to resolve
the issue with their card..
Jason
next prev parent reply other threads:[~2026-04-16 22:37 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-16 7:07 [PATCH] PCI: Avoid FLR for NVIDIA 5090 GPU yuan.gao
2026-04-16 17:31 ` Bjorn Helgaas
2026-04-16 22:37 ` Jason Gunthorpe [this message]
2026-04-17 2:06 ` yuan.gao
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