From: Tony Lindgren <tony@atomide.com>
To: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Cc: linux-arm-kernel@lists.infradead.org, Nishanth Menon <nm@ti.com>,
"Bajjuri, Praneeth" <praneeth@ti.com>,
linux-omap@vger.kernel.org
Subject: Re: Random stack corruption on v5.13 with dra76
Date: Fri, 21 May 2021 12:14:19 +0300 [thread overview]
Message-ID: <YKd56/KAnIUIm7K5@atomide.com> (raw)
In-Reply-To: <064a9324-cfcf-47b9-6ae3-a29085a52683@ideasonboard.com>
* Tomi Valkeinen <tomi.valkeinen@ideasonboard.com> [210521 08:45]:
> On 21/05/2021 10:39, Tony Lindgren wrote:
> > * Tomi Valkeinen <tomi.valkeinen@ideasonboard.com> [210521 07:05]:
> > > On 21/05/2021 08:36, Tony Lindgren wrote:
> > > > * Tomi Valkeinen <tomi.valkeinen@ideasonboard.com> [210520 08:27]:
> > > > > Hi,
> > > > >
> > > > > I've noticed that the v5.13 rcs crash randomly (but quite often) on dra76 evm
> > > > > (I haven't tested other boards). Anyone else seen this problem?
> > > >
> > > > I have not seen this so far and beagle-x15 is behaving for me.
> > > >
> > > > Does it always happen on boot?
> > >
> > > No, but quite often. I can't really say how often, as it's annoyingly random.
> > > I tried to bisect, but that proved to be difficult as sometimes I get multiple (5+)
> > > successful boots before the crash.
> > >
> > > I tested with x15, same issue (below). So... Something in my kernel config? Or compiler?
> > > Looks like the crash happens always very soon after (or during) probing palmas.
> >
> > After about 10 reboots with your .config I'm seeing it now too on
> > beagle-x15. So far no luck reproducing it with omap2plus_defconfig.
>
> I think I have an easy way to see if a kernel is good or bad, by printing
> stack_not_used(current) in the first call to omap_i2c_xfer_irq(). There's a
> huge drop between v5.12 and v5.13-rc1.
>
> And interestingly, sometimes a simple printk seems to use hundreds of bytes
> of stack (i.e. compare stack usage before and after the print). But not
> always. So maybe the issue is somehow related to printk.
>
> I'm bisecting.
OK sounds good to me.
Thanks,
Tony
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next prev parent reply other threads:[~2021-05-21 9:16 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <0f48c7e5-6acd-1143-35ef-3dea2255bec6@ideasonboard.com>
2021-05-21 5:36 ` Random stack corruption on v5.13 with dra76 Tony Lindgren
2021-05-21 7:04 ` Tomi Valkeinen
2021-05-21 7:39 ` Tony Lindgren
2021-05-21 8:45 ` Tomi Valkeinen
2021-05-21 9:14 ` Tony Lindgren [this message]
2021-05-21 10:30 ` Tomi Valkeinen
2021-05-21 12:57 ` Tomi Valkeinen
2021-05-21 13:06 ` Tony Lindgren
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