Messages in this thread | | | Subject | Re: [RFC] Fix NMI watchdog documentation | From | Disconnect <> | Date | 25 May 2003 01:52:16 -0400 |
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On Sun, 2003-05-25 at 01:03, Zwane Mwaikambo wrote: > On Sun, 25 May 2003 Valdis.Kletnieks@vt.edu wrote: > > > On Sat, 24 May 2003 23:36:26 EDT, Zwane Mwaikambo said: > > > > > > Dell Latitude with broken BIOS detected. Refusing to enable the local APIC. > > > > > It's known broken with that configuration and hence blacklisted. > > > > Yes, I know it's blacklisted. The question I intended to ask was "Is the > > entire concept of IOAPIC irretrievably scrozzled on this machine, or is there > > sufficient minimum functionality to get nmi_watchdog working?" > > You don't have an IOAPIC at all, but the Local APIC has been known to > cause problems. So forget about nmi_watchdog. > > Zwane
I was reading that code the other day (just out of curiosity, believe it or not) and I'm wondering how recently that has been tested - most of the blacklist/oddness workarounds listed in dmi_scan.c are model-specific, but the APIC entry is any Dell Inspiron or Latitude.
I'm going to remove the test tomorrow sometime and see what happens - lots has changed since the Inspiron 8000, including a migration to p4-mobile, so its worth seeing if the newer Dells are fixed. If so, I'll submit a patch to make that more model-specific (probably I'll just add a whitelist function - no_local_apic_kills_bios or some such; seems better than listing every dell inspiron individually..)
I'm encouraged by the complete lack of APM or any of the 'enter bios while running' options present on the older laptops; according to the comments, even if the APIC kills the bios on entry/exit, it won't matter since you can't trigger it to begin with..
--
Disconnect <lkml@sigkill.net>
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