Re: qemu-i386 boot failed on mainline master - no console output

[Naresh Kamboju]

On Wed, 2 Apr 2025 at 16:57, Greg Kroah-Hartman
<gregkh@xxxxxxxxxxxxxxxxxxx> wrote:
>
> On Wed, Apr 02, 2025 at 02:24:53PM +0530, Naresh Kamboju wrote:
> > + Linus
> > + Greg KH
> >
> > On Wed, 2 Apr 2025 at 14:14, Naresh Kamboju <naresh.kamboju@xxxxxxxxxx> wrote:
> > >
> > > Regressions on qemu-i386 devices boot tests failed with defconfig on
> > > the mainline master no console output.
> > >
> >
> > The qemu-i386 boot failed with no console output and is still happening on
> > the latest mainline master branch.
> >
> > > First seen on the char-misc-6.15-rc1 merge 25601e85441d ("Merge tag
> > > 'char-misc-6.15-rc1' of...)
> > >  Good: [08733088b566b58283f0f12fb73f5db6a9a9de30] Merge tag
> > > 'rust-fixes-6.15-merge'
> > >  Bad:  [91e5bfe317d8f8471fbaa3e70cf66cae1314a516] Merge tag 'dmaengine-6.15-rc1'
> > >
> > > * qemu-i386
> > >  - boot
> > >
> > > Regression Analysis:
> > >  - New regression? Yes
> > >  - Reproducibility? Yes
> > >
> > > Test regression: qemu-i386 boot failed on mainline master
> > > Reported-by: Linux Kernel Functional Testing <lkft@xxxxxxxxxx>
> > >
> > > Anders bisected this to,
> > >   # first bad commit:
> > >     [eb0ece16027f8223d5dc9aaf90124f70577bd22a]
> > >     Merge tag 'mm-stable-2025-03-30-16-52' of
> > > git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
>
> But this is bisected to the mm merge, not the char-misc merge, right?
>
> And is this just on i386?  Nothing arch-specific in the char-misc merge
> that I can see, so I would place bets on mm doing something accidentally
> on 32bit systems.

The qemu-i386 boot pass with the latest mainline kernel with
clang-nightly and gcc-13.
 Linux version 6.15.0-rc1 (tuxmake@tuxmake) (Debian clang version
21.0.0 (++20250402105505+c57b9c233a87-1~exp1~20250402225526.1363),
Debian LLD 21.0.0) #1 SMP PREEMPT_DYNAMIC @1743981563


Links:
 - https://tuxapi.tuxsuite.com/v1/groups/linaro/projects/naresh/tests/2vUkJBr5vV419fzcTFDkOmiIkax
 - https://tuxapi.tuxsuite.com/v1/groups/linaro/projects/naresh/tests/2vUk3KcyEleDxVppDpZ1jeSIx0j

 - Naresh

>
> thanks,
>
> greg k-h