Re: [PATCH v6 2/2] x86 mce: use new printk recursion disablinginterface

From: Borislav Petkov
Date: Wed Jun 06 2012 - 11:22:38 EST


On Wed, Jun 06, 2012 at 04:34:21PM +0800, ShuoX Liu wrote:
> From: ShuoX Liu <shuox.liu@xxxxxxxxx>
>
> On x86 machines, some times MCE happens just when kernel calls printk
> to output some log info to serial console, while usually MCE module in
> kernel is used to print out some hardware error information, such like
> bad cache or bad memory bank. That causes printk recursion and printk
> would omit MCE printk output.
>
> We hit it when running MTBF testing on Android ATOM mobiles.
>
> Here in mce_panic, we choose to disable printk recursion to make sure
> MCE logs printed out.

Just a minor nitpick: this should say "print_mce" or you can simply
remove the whole sentence - commit message is fine without it too.

Aside of that, those look ok to me.

Thanks.

--
Regards/Gruss,
Boris.
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