Re: [PATCH 5.15 000/159] 5.15.116-rc1 review

[Greg Kroah-Hartman]

On Fri, Jun 09, 2023 at 12:31:04PM -0700, Guenter Roeck wrote:
> On 6/9/23 12:06, Linus Torvalds wrote:
> > On Fri, Jun 9, 2023 at 11:42 AM Guenter Roeck <linux@xxxxxxxxxxxx> wrote:
> > > 
> > > I managed to revise my bisect script sufficiently enough to get reliable
> > > results. It looks like the culprit is commit 503e554782c9 (" debugobject:
> > > Ensure pool refill (again)"); see bisect log below. Bisect on four
> > > different systems all have the same result. After reverting this patch,
> > > I do not see the problem anymore (again, confirmed on four different
> > > systems).
> > 
> > Does this happen on mainline too? It's commit 0af462f19e63 in the upstream tree.
> > 
> > It was in 6.4-rc1, and I see a clean result from you at least for
> > -rc2, so for some reason it sounds like upstream is ok. But I don't
> > really see why that would be the case...
> > 
> 
> I see the problem only in v5.15.y, to the point where it is almost
> impossible to get a clean test of all arm-v7 systems. Affected are
> npcm (Nuvoton) boards (kudo-bmc, quanta-gsj, npcm750-evb) as well as
> orangepi-pc. I don't see it in any other branch or with any other
> platform/architecture.
> 
> Mainline is fine; I have not seen any problems since -rc2.
> 
> I have no idea what is going on either, only that I can reliably
> reproduce the problem (and of course it disappears if CONFIG_DEBUG_OBJECTS
> is disabled).

Ok, I've reverted it from 5.15.y for now until this is figured out.

thanks,

greg k-h