Messages in this thread | ![/](/images/icornerl.gif) | | Date | 5 Aug 2003 23:19:10 +0200 | Date | Tue, 5 Aug 2003 23:19:10 +0200 | From | Andi Kleen <> | Subject | Re: [PATCH] Export touch_nmi_watchdog |
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On Tue, Aug 05, 2003 at 09:15:54PM +0000, Arjan van de Ven wrote: > On Tue, Aug 05, 2003 at 11:14:16PM +0200, Andi Kleen wrote: > > > Otherwise this will just keep on expanding. > > > > It does expand on i386 exactly because the watchdog is disabled by default. > > > > Looks like a mistake to me. It should be on because having usable backtraces > > on a deadlock/hang is useful enough that it outweights any other possible > > disadvantages. That's especially true for kernels out there at user's boxes, > > not just special debugging kernels run by developers. > > > > [if there should be any hardware where it doesn't work it should be blacklisted > > there] > > the reason it's off is that certain IBM bioses corrupt the eax register on > NMI's when they collide with smm stuff... You'd be surprised how > tolerant x86 is against such corruptions... but not 100% :)
That could be catched by a dmi_scan.c entry ?
-Andi
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