Messages in this thread | | | Date | Wed, 12 Nov 2008 19:03:24 -0500 (EST) | From | Steven Rostedt <> | Subject | Re: [PATCH 1/2] ftrace: disable tracing on resize |
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On Wed, 12 Nov 2008, Pekka Paalanen wrote:
> On Mon, 10 Nov 2008 22:18:19 -0500 (EST) > Steven Rostedt <rostedt@goodmis.org> wrote: > > > > > Pekka, > > > > I forgot to add you to the Cc list. Could you test this patch to see if it > > fixes the bug you reported. It fixed a bug I was able to reproduce, but I > > was never able to reproduce the exact same bug you have seen. > > Thanks, Steve. > > I didn't have time to try it myself yet, but a kind soul tried it for me. > He used 2.6.28-rc4 and was immediately able to trigger the bug by just: > cd /debug/tracing > echo 0 > tracing_enabled > echo 200 > trace_entries > > Then he applied the patch you referred to, and the bug is still present. > He has a 32-bit x86 amd system, and I'm on x86_64. > > I don't know why you couldn't reproduce it, maybe you have all the tracers > enabled in the kernel config, when we only have MMIOTRACE.
After disabling all other tracers, you are right. This sequence crashes.
I'll look into it, and I should have a patch sometime tonight.
-- Steve
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