Messages in this thread | | | Subject | Re: nmi_watchdog default setting on i386 and x86_64 | From | Andi Kleen <> | Date | 23 May 2006 16:37:57 +0200 |
| |
Mikael Pettersson <mikpe@csd.uu.se> writes:
> Mike Mason writes: > > Does anybody know the reasoning behind having nmi_watchdog turned off by > > default on i386 and on by default on x86_64. I've heard that i386 had > > problems with false positives in the past, but that local apic watchdog > > may make that concern obsolete. > > On i386 the problems are mainly hardware and BIOS. In particular, > lots of Dell laptops have capable hardware but broken BIOSen that > hang the machines if we try to enable anything sending performance > counter interrupts via the local APIC.
AFAIK that trouble was mostly when you forced the local APIC on against the wishes of the BIOS. That was always a dumb idea and gladly Linux doesn't try that by default anymore.
-Andi
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |