Bug#1135313: Logspam: "AMD-Vi: Completion-Wait loop timed out"

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From	Salvatore Bonaccorso <carnil@debian.org>
Newsgroups	linux.debian.bugs.dist, linux.debian.kernel
Subject	Bug#1135313: Logspam: "AMD-Vi: Completion-Wait loop timed out"
Date	Tue, 05 May 2026 21:50:01 +0200
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X-Original-To	Friedemann Stoyan <fstoyan@swapon.de>, 1135313@bugs.debian.org
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Cross-posted to 2 groups.

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Hi Friedemann,

On Tue, May 05, 2026 at 04:36:44AM +0200, Friedemann Stoyan wrote:
> On  4.05.26 08:10, Salvatore Bonaccorso wrote:
> 
> Hello Salvatore,
> 
> > Thank you very much for doing this work, much appreciated. Can you
> > check, applying the following upstream change will fix the problem?
> > 
> > https://git.kernel.org/linus/9e249c48412828e807afddc21527eb734dc9bd3d
> > ?
> > 
> > The commit is not applying cleanly, attached is an attempt of a
> > backport, but I could not yet test it. If you can, and it builds and
> > fixes the problem please report back as well so we can confirm the
> > backport request upstream. if it does not work we need to look
> > further.
> 
> I applied your backport patch: 0001-iommu-amd-serialize-sequence-allocation-under-concur.patch
> It completely resolves the issue.

Thanks for reporting back quickly. I will double check if in meanwhile
it is known upstream for backporting and otherwise ask that it get
picked in next updates for the 6.12.y series.

Regards,
Salvatore

Thread

Bug#1135313: Logspam: "AMD-Vi: Completion-Wait loop timed out" "F. Stoyan" <fstoyan+reportbug@swapon.de> - 2026-05-01 06:20 +0200
  Bug#1135313: Logspam: "AMD-Vi: Completion-Wait loop timed out" Salvatore Bonaccorso <carnil@debian.org> - 2026-05-01 08:00 +0200
    Bug#1135313: Logspam: "AMD-Vi: Completion-Wait loop timed out" Friedemann Stoyan <fstoyan@swapon.de> - 2026-05-04 06:20 +0200
      Bug#1135313: Logspam: "AMD-Vi: Completion-Wait loop timed out" Salvatore Bonaccorso <carnil@debian.org> - 2026-05-04 08:20 +0200
        Bug#1135313: Logspam: "AMD-Vi: Completion-Wait loop timed out" Friedemann Stoyan <fstoyan@swapon.de> - 2026-05-05 04:40 +0200
          Bug#1135313: Logspam: "AMD-Vi: Completion-Wait loop timed out" Salvatore Bonaccorso <carnil@debian.org> - 2026-05-05 21:50 +0200
  Processed: Re: Bug#1135313: Logspam: "AMD-Vi: Completion-Wait  loop timed out" "Debian Bug Tracking System" <owner@bugs.debian.org> - 2026-05-01 08:00 +0200
  Processed: Re: Bug#1135313: Logspam: "AMD-Vi: Completion-Wait  loop timed out" "Debian Bug Tracking System" <owner@bugs.debian.org> - 2026-05-04 08:20 +0200
  Bug#1135313: Logspam: "AMD-Vi: Completion-Wait loop timed out" Salvatore Bonaccorso <carnil@debian.org> - 2026-05-04 08:20 +0200
  Bug#1135313: Please backport 9e249c484128 ("iommu/amd: serialize sequence allocation under concurrent TLB invalidations") to 6.12.y Sasha Levin <sashal@kernel.org> - 2026-05-09 14:50 +0200

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