linux-kernel - Re: [Regression] Commit 40613da52b13 ("PCI: acpiphp: Reassign resources on bridge if necessary")

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Date: Fri, 15 Dec 2023 21:57:43 +1030
From: Jonathan Woithe <jwoithe@...t42.net>
To: Igor Mammedov <imammedo@...hat.com>
Cc: bhelgaas@...gle.com, linux-pci@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [Regression] Commit 40613da52b13 ("PCI: acpiphp: Reassign
 resources on bridge if necessary")

On Fri, Dec 15, 2023 at 08:43:29AM +1030, Jonathan Woithe wrote:
> On Thu, Dec 14, 2023 at 02:32:05PM +0100, Igor Mammedov wrote:
> > On Thu, 14 Dec 2023 11:58:20 +1030 Jonathan Woithe wrote:
> > > 
> > > Following an update from 5.15.72 to 5.15.139 on one of my machines, the
> > 
> > looks like you are running downstream kernel, can you file bug report
> > with distro that you use (with a link posed here as well).
> 
> I am running Slackware64 15.0.  The kernels supplied by that distribution
> are unmodified kernel.org kernels.
> 
> > For now offending patches are being reverted, so downstream bug will help
> > with tracking it and reverting it there. 
> 
> The patches will be reverted in Slackware as a matter of course when a
> kernel.org "-stable" kernel with the fix is adopted.  Slackware does not
> apply any patches to kernel.org kernels.  Nevertheless, I will raise a post
> in the forum, hopefully later today.

This has now been done:

  https://www.linuxquestions.org/questions/slackware-14/heads-up-pci-regression-introduced-in-or-around-5-15-129-commit-40613da52b13-4175731828/#post6470559

> > > The output of lspci is given at the end of this post[1].  The CPU is an
> > > "Intel(R) Core(TM) i7-5930K CPU @ 3.50GHz" which is not overclocked.  Please
> > > let me know if you'd like more information about the affected machine.  I
> > > can also perform additional tests if required, although for various reasons
> > > these can only be done on Thursdays at present.
> > > 
> > > The kernel configuration file can easily be supplied if that would be
> > > useful.
> > 
> > full dmesg log and used config might help down the road (preferably with current
> > upstream kernel), as I will be looking into fixing related issues.
> > 
> > Perhaps a better way for taking this issue and collecting logs, will be
> > opening a separate bug at https://bugzilla.kernel.org (pls CC me as well)
> 
> Sure, will do.  I'll be able to get the dmesg log from my earlier tests and
> config easily enough.  Testing with another kernel will have to wait until
> next Thursday as that is when I'll next have physical access to the machine.

A bug has been opened at bugzilla.kernel.org as requested.  The logs, kernel
configuration and the "lspci -tv" output (requested in a subsequent email)
have been added.  The logs and kernel configuration are from the kernel.org
5.15.139 kernel.  You have been added to the bug's CC.  The bug number is
218268:

  https://bugzilla.kernel.org/show_bug.cgi?id=218268

As mentioned, testing another kernel can only happen next Thursday.  If
you would like other tests done let me know and I'll do them at the same
time.  I have remote access to the machine, so it's possible to retrieve
information from it at any time.

Let me know if there's anything else I can do to assist.

Regards
  jonathan