frozen PHB on IBM Power9 system in 6.15-rc2 (bisected)

[Dan Horák]

Hi Hannes,

On Tue, 22 Apr 2025 08:37:32 +0200
Hannes Reinecke <hare at suse.de> wrote:

> On 4/17/25 17:10, Dan Horák wrote:
> > Hi,
> > 
> > I am seeing "frozen PHB" on Power9 bare-metal (PowerNV ppc64le) system
> > leading to non-accessible nvme drives (they are behind a switch) in the
> > 6.15-rc2 kernel (originally with kernel-6.15.0-0.rc2.22.fc43). I was
> > able to bisect the issue to commit
> > 62baf70c327444338c34703c71aa8cc8e4189bd6 [1].
> > 
> > Please see [2] for full console log and other details. Please ignore
> > the "soft-lockup" messages, they are unrelated and going to be resolved
> > with [3]. We are building the kernel with CONFIG_NVME_MULTIPATH=y
> > 
> > [1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=62baf70c327444338c34703c71aa8cc8e4189bd6
> > [2] https://fedora.danny.cz/ppc/rdsosreport.txt
> > [3] https://lore.kernel.org/all/20250410125110.1232329-1-gshan@redhat.com/
> > 
> Already fixed with 'nvme: fixup scan failure for non-ANA multipath
> controllers', included in the latest pull request to Jens.

thanks for the pointer, will give it a try soon


		Dan

> 
> Cheers,
> 
> Hannes
> -- 
> Dr. Hannes Reinecke                  Kernel Storage Architect
> hare at suse.de                                +49 911 74053 688
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