Re: [PATCH] prevent nested panic from soft lockup detection

From: Jan Beulich
Date: Tue Jan 31 2006 - 08:45:04 EST


>> I've been wondering for a while why we don't just make touch_nmi_watchdog
>> do an implicit call to touch_softlockup_watchdog. I can't think of a situation
>> where we'd want to do one but not the other, and adding patches like this
>> seems to be an uphill battle (I know at least two other places that need
>> this off the top of my head).
>
>Very good idea.
>
>Someone did it already in the SUSE kernel and it helped considerably
>there.

Actually, plain 2.6.15 already has this (for i386 and x86-64 at least). Hence the first of the two hunks the patch
consists of is superfluous. The second hunk, however, is still necessary (as there's no pre-existing
touch_nmi_watchdog() call there, and there also shouldn't be one as interrupts get re-enabled before getting there).

Jan
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