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SubjectRe: [PATCH 5.15 000/927] 5.15.3-rc2 review
5.16-rc1 boots fine with the commit in, it's just the 5.15.3-rc builds
with it that are giving me trouble.

cheers,
Scott

On Wed, Nov 17, 2021 at 12:04 AM Greg Kroah-Hartman
<gregkh@linuxfoundation.org> wrote:
>
> On Tue, Nov 16, 2021 at 09:41:07PM -0800, Scott Bruce wrote:
> > On 11/16/21 13:59, Scott Bruce wrote:
> > > On 11/16/21 07:01, Greg Kroah-Hartman wrote:
> > >> This is the start of the stable review cycle for the 5.15.3 release.
> > >> There are 927 patches in this series, all will be posted as a response
> > >> to this one. If anyone has any issues with these being applied, please
> > >> let me know.
> > >>
> > >> Responses should be made by Thu, 18 Nov 2021 14:24:22 +0000.
> > >> Anything received after that time might be too late.
> > >>
> > >> The whole patch series can be found in one patch at:
> > >> https://www.kernel.org/pub/linux/kernel/v5.x/stable-review/patch-5.15.3-rc2.gz
> > >>
> > >> or in the git tree and branch at:
> > >> git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git
> > >> linux-5.15.y
> > >> and the diffstat can be found below.
> > >>
> > >> thanks,
> > >>
> > >> greg k-h
> > >>
> > >
> > > Regression found on x86-64 AMD (ASUS GA503QR, Cezanne platform)
> > > somewhere between 7f9a9d5d9983 and 5.15.3-rc1. The very early -rc1 tag
> > > from a day and a half ago boots fine, -rc1 final and -rc2 boot into a
> > > kernel panic during init.
> > >
> > > Unfortunately I can't gather any useful debug info from the panic as the
> > > relevant bits are instantly pushed off the screen by rest of the dump.
> > >
> > > Here's what I'm left with on screen after the panic, hopefully someone
> > > can get something useful out of it:
> > > https://photos.app.goo.gl/6FrYPfZCY6YdnPDz6
> > >
> > > I'll bisect and try to narrow this down some today but I'm running
> > > builds on my laptop while I work so it won't be super quick.
> > >
> > > Scott
> >
> > Reverting c3fc9d9e8f2dc518a8ce3c77f833a11b47865944 "x86: Fix
> > __get_wchan() for !STACKTRACE" resolves this issue.
> >
> > With this revert in place 5.15.3-rc2 boots successfully with no dmesg
> > regressions on my AMD Cezanne laptop, I'll wait for actual use
> > tomorrow to leave a proper
> > tested by.
>
> This is odd. Do you see the same issues in 5.16-rc1? We want this
> commit in here as we "need" bc9bbb81730e ("x86: Fix get_wchan() to
> support the ORC unwinder") because it fixes things that are reported to
> be broken.
>
> thanks,
>
> greg k-h

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