Re: Kernel OOPS in function_graph_tracer due to the44259b1abfaa8bb819d25d41d71e8e33e25dd36a commit (x86-64: Move vread_tsc intoa new file with sensible options)

[Andrew Lutomirski]

On Mon, May 30, 2011 at 12:10 PM, Witold Baryluk
<baryluk@xxxxxxxxxxxxxxxx> wrote:
> Hi,
>
> I found yesterday a problem when booting system on Pentium-M, 32-bit.
>
> I got approximetly this
>
> [    2.459170] Testing tracer function_graph:
> [    2.466979] BUG: unable to handle kernel paging request at e421cc10

>
> Reverting commit 44259b1abfaa8bb819d25d41d71e8e33e25dd36a on top of current
> kernel make bug disapear.
>
> Disabling CONFIG_FUNCTION_GRAPH_TRACER also make bug dispear.
>

Of course, the most trivial of my patches was the one with the most
significant bug.  Can you try this fix:

http://git.kernel.org/?p=linux/kernel/git/x86/linux-2.6-tip.git;a=commitdiff;h=89e1be50c68eb5e58b873dce87bbac627ee18d1f

--Andy
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