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Date:   Mon, 12 Jun 2023 11:13:40 +0200
From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     Guenter Roeck <linux@roeck-us.net>
Cc:     Linus Torvalds <torvalds@linux-foundation.org>,
        stable@vger.kernel.org, patches@lists.linux.dev,
        linux-kernel@vger.kernel.org, akpm@linux-foundation.org,
        shuah@kernel.org, patches@kernelci.org,
        lkft-triage@lists.linaro.org, pavel@denx.de, jonathanh@nvidia.com,
        f.fainelli@gmail.com, sudipm.mukherjee@gmail.com,
        srw@sladewatkins.net, rwarsow@gmx.de,
        Thomas Gleixner <tglx@linutronix.de>,
        Ido Schimmel <idosch@nvidia.com>
Subject: Re: [PATCH 5.15 000/159] 5.15.116-rc1 review
Message-ID: <2023061226-footgear-kooky-cb04@gregkh>
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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@roeck-us.net> 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