linux-kernel - Re: [PATCH v2 0/7] PCI: Solve two bridge window sizing issues

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Message-ID: <ZZaiLOR4aO84CG2S@marvin.atrad.com.au>
Date: Thu, 4 Jan 2024 22:48:52 +1030
From: Jonathan Woithe <jwoithe@...t42.net>
To: Igor Mammedov <imammedo@...hat.com>
Cc: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>,
        linux-pci@...r.kernel.org, Bjorn Helgaas <bhelgaas@...gle.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Rob Herring <robh@...nel.org>,
        Krzysztof Wilczyński <kw@...ux.com>,
        Lukas Wunner <lukas@...ner.de>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Andy Shevchenko <andriy.shevchenko@...el.com>,
        "Rafael J . Wysocki" <rafael@...nel.org>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 0/7] PCI: Solve two bridge window sizing issues

On Thu, Jan 04, 2024 at 01:12:10PM +0100, Igor Mammedov wrote:
> On Thu, 28 Dec 2023 18:57:00 +0200
> Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com> wrote:
> 
> > Hi all,
> > 
> > Here's a series that contains two fixes to PCI bridge window sizing
> > algorithm. Together, they should enable remove & rescan cycle to work
> > for a PCI bus that has PCI devices with optional resources and/or
> > disparity in BAR sizes.
> > 
> > For the second fix, I chose to expose find_empty_resource_slot() from
> > kernel/resource.c because it should increase accuracy of the cannot-fit
> > decision (currently that function is called find_resource()). In order
> > to do that sensibly, a few improvements seemed in order to make its
> > interface and name of the function sane before exposing it. Thus, the
> > few extra patches on resource side.
> > 
> > Unfortunately I don't have a reason to suspect these would help with
> > the issues related to the currently ongoing resource regression
> > thread [1].
> 
> Jonathan,
> can you test this series on affected machine with broken kernel to see if
> it's of any help in your case?

Certainly, but it will have to wait until next Thursday (11 Jan 2024).  I'm
still on leave this week, and when at work I only have physical access to
the machine concerned on Thursdays at present.

Which kernel would you prefer I apply the series to?

Regards
  jonathan