lkml.org 
[lkml]   [2008]   [Oct]   [22]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [RFC][PATCH] nmi watchdog: handle NMI_IO_APIC on nmi_watchdog
> > > but this stops all NMIs, not just the IO-APIC generated ones, doesnt it? 
> > external NMIs would come by LINT1, no?
>
> Correct.
>
> > after reading a lot and talking with Vivek, what I understood was that 8259 is
> > also connected to LINT0, so timer interrupts would be reported both in
> > IOAPIC and on LINT0. LVT0 is being configured on setup_nmi() to generate
> > an NMI. Also, the same timer interrupt would generate an regular interrupt
> > coming from IOAPIC. Clearing the APIC_DM_NMI on LVT0 would disable the
> > NMI delivery, but not the regular interrupt.
> > or am I missing something here?
>
> You are correct. The routing of the 8254 timer interrupt may vary, but
> the NMI watchdog it drives, if supported, always uses the LINT0 input of
> all the local APICs.
thanks

> You seem to be writing in reply to a very old thread -- please make sure
> your concerns are still valid with current code. For example we have an
> implementation of __acpi_nmi_disable() now, which is exactly your proposed
> one.
didn't noticed that, sorry.

--
Aristeu



\
 
 \ /
  Last update: 2008-10-23 05:39    [W:0.043 / U:12.740 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site