Re: [PATCH 6.13 000/443] 6.13.3-rc1 review

[Greg Kroah-Hartman <gregkh@linuxfoundation.org>]

On Fri, Feb 14, 2025 at 11:12:06AM +0100, Holger Hoffstätte wrote:
> On 2025-02-14 09:42, Greg Kroah-Hartman wrote:
> > On Fri, Feb 14, 2025 at 09:32:06AM +0100, Holger Hoffstätte wrote:
> > > On 2025-02-13 15:22, Greg Kroah-Hartman wrote:
> > > > This is the start of the stable review cycle for the 6.13.3 release.
> > > > There are 443 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.
> > > 
> > > Builds & runs fine BUT fails to suspend to RAM 99.99% of the time (basically
> > > one success but never again). Display powers down but fans stay on.
> > > 
> > > Tested on multiple systems, all x64. I first suspected amdgpu because why not :)
> > > but it also fails on a system without amdgpu, so that's not it.
> > > 
> > > Reverting to 6.13.2 immediately fixes everything.
> > > 
> > > Common symptom on all machines seems to be
> > > 
> > > [  +0.000134] Disabling non-boot CPUs ...
> > > [  +0.000072] Error taking CPU15 down: -16
> > > [  +0.000002] Non-boot CPUs are not disabled
> > > 
> > > "Error taking down CPUX" is always the highest number of CPU, i.e.
> > > 15 on my 16-core Zen2 laptop, 3 on my 4-core Sandybridge etc.
> > > 
> > > I started to revert suspects but no luck so far:
> > > - acpi parsing order
> > > - amdgpu backlight quirks
> > > - timers/hrtimers
> > > 
> > > Suggestions for other suspects are welcome.
> > 
> > Can you run 'git bisect' to try to find the offending change?
> 
> (cc: Juri Lelli)
> 
> Whoop! Whoop! The sound of da police!
> 
> 2ce2a62881abcd379b714bf41aa671ad7657bdd2 is the first bad commit
> commit 2ce2a62881abcd379b714bf41aa671ad7657bdd2 (HEAD)
> Author: Juri Lelli <juri.lelli@redhat.com>
> Date:   Fri Nov 15 11:48:29 2024 +0000
> 
>     sched/deadline: Check bandwidth overflow earlier for hotplug
>     [ Upstream commit 53916d5fd3c0b658de3463439dd2b7ce765072cb ]
> 
> With this reverted it reliably suspends again.

Thanks!  I'll go revert that one now and push out new -rc releases soon.

greg k-h