Re: port-xen/39916: kernel panic with xen 3.1 on 5.0-Beta i386 (HP DL 380 G3) (200811090002Z)

[Manuel Bouyer <bouyer%antioche.eu.org@localhost>]

On Thu, Nov 13, 2008 at 09:20:00PM +0000, uw%o3si.de@localhost wrote:
> >Number:         39916
> >Category:       port-xen
> >Synopsis:       xen kernel fault on i389 with 5.0 Beta
> >Confidential:   no
> >Severity:       critical
> >Priority:       high
> >Responsible:    port-xen-maintainer
> >State:          open
> >Class:          sw-bug
> >Submitter-Id:   net
> >Arrival-Date:   Thu Nov 13 21:20:00 +0000 2008
> >Originator:     Charlie Root
> >Release:        NetBSD 5.0_BETA
> >Environment:
> System: NetBSD root03.o3si.de 5.0_BETA NetBSD 5.0_BETA (XEN3_DOM0) #1:
> Thu Nov 13 15:17:38 CET 2008
> root%root03.o3si.de@localhost:/usr/src/sys/arch/i386/compile/XEN3_DOM0 i386
> Architecture: i386 Machine: i386
> >Description:
> The system crashes after running ca. for two days with the following
> console output:
> 
> panic: kernel diagnostic assertion "iplbit !=3D 0" failed. file "../../../.=
> ./arch/
> xen/xen/evtchn.c", line 294

This should already be partially fixed in current and netbsd-5 (partially
because it may still panic later on another KASSERT).
evtchn.c 1.41 should fix the panic (although the real issue, which is
that the IPL isn't lowered when it should, is still there it seems).

evtchn.c 1.41 should print a debug printf with the address of the handler
which didn't lower the IPL; I'm interested to know what this printf
shows in dmesg after several days.

-- 
Manuel Bouyer <bouyer%antioche.eu.org@localhost>
     NetBSD: 26 ans d'experience feront toujours la difference
--