Re: Random scheduler/unaligned accesses crashes with perf lockevents on sparc 64

From: Frederic Weisbecker
Date: Mon Apr 05 2010 - 02:57:24 EST

On Sun, Apr 04, 2010 at 06:00:57PM -0700, David Miller wrote:
> From: Frederic Weisbecker <fweisbec@xxxxxxxxx>
> Date: Sun, 4 Apr 2010 14:21:19 +0200
> > Forgot the config, it's in attachment.
> I get them too when even trying to use the function tracer in some
> simple way. They occur in random places and eventually the entire
> machine wedges and is unusuable.

Yeah. But it's not totally random. I often see the same scheduler

It seems to happen after an unaligned access fixup.

> I suspect there is some bug that ends up corrupting memory, so I
> started trying to debug this last night when I first saw it.

Ok. I indeed have the same problem with the function tracer when
it is running.

> I'll let you know if I make any progress.


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