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DateMon, 9 Nov 2009 10:43:09 +0100 (CET)
FromThomas Gleixner <>
SubjectRe: 2.6.32-rc5-mmotm1101 - lockdep whinge during early boot
On Thu, 5 Nov 2009, Thomas Gleixner wrote:
> On Thu, 5 Nov 2009, Martin Schwidefsky wrote:
> > >
> > > Which basically reverts commit 7285dd7fd375763bfb8ab1ac9cf3f1206f503c16
> > >
> >
> > It is this commit in linux-next:
> >
> > commit 66b1a72ceaa7da811db025855f19482f0a38e815
> > Author: Ingo Molnar <mingo@elte.hu>
> > Date: Thu Sep 10 19:39:52 2009 +0200
> >
> > Revert "clocksource: Resolve cpu hotplug dead lock with TSC unstable"
> >
> > This reverts commit 7285dd7fd375763bfb8ab1ac9cf3f1206f503c16.
> >
> > causes crashes.
> >
> > Signed-off-by: Ingo Molnar <mingo@elte.hu>
>
> Eeek. We fixed this in mainline via:
>
> commit f79e0258ea1f04d63db499479b5fb855dff6dbc5
> Author: Martin Schwidefsky <schwidefsky@de.ibm.com>
> Date: Fri Sep 11 15:33:05 2009 +0200
>
> clocksource: Resolve cpu hotplug dead lock with TSC unstable, fix crash
>
> and
>
> commit 54a6bc0b071c50150bc6d1da16c2cd9a963e288c
> Author: Thomas Gleixner <tglx@linutronix.de>
> Date: Mon Sep 14 19:49:02 2009 +0200
>
> clocksource: Delay clocksource down rating to late boot
>
>
> These patches came via the tip tree right at the beginning of the
> merge window several days _before_ I asked Linus to pull the timer
> code for 32.
>
> So there is something weird going on.

Ok, figured out what happened.

The revert has been in next via the tip-tree for some days when
testing turned up the problem and the fixes were not ready.

So it looks like Andrew picked exactly such a linux-next snapshot to
create his baseline patch.

linux-next, tip, mainline of today all have the correct and functional
code.

Thanks,

tglx


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