Re: kernel diagnostic assertion in evtchn.c

[Kazushi (Jam) Marukawa <jam%pobox.com@localhost>]

Hi,

   On Jun 7, 19:54, Manuel Bouyer wrote:
   > Subject: Re: kernel diagnostic assertion in evtchn.c
   > > I'll apply your patch and try to reproduce the problem.
   > > Need a few days I think.
   > thanks. I'm also running with this patch on my test box and trying to
   > reproduce the issue, but for now it's been stable ...

It crashed here.  I just ran Windows XP and download some
garbage files from http server to samba server that is the
same as the xen dom0.  Like following image.

  +-------------+ run  +----------------+ read +-----------+
  | xen dom0    |----->| Win XP as domU |<-----|http server|
  |             |write |                |      +-----------+
  | smb server  |<-----|                |
  +-------------+      +----------------+

This caused following crash.

-----
evtchn_do_event: ih 0xc1584660 ih_level 0 != i 8
ih handlers:
 0xc1584660 fn 0xc06b7e00
 0xc1584ea0 fn 0xc04fa890
panic: ih->ih_level != i
fatal breakpoint trap in supervisor mode
trap type 1 code 0 eip c04e5c1c cs 10009 eflags 46 cr2 ccce813f ilevel 8
Stopped in pid 464.1 (find) at  netbsd:breakpoint+0x4:  popl    %ebp
db> trace
breakpoint(c0909878,cb1a5fb4,c0973580,c0454195,1,5,0,0,cb1a5fbc,f) at netbsd:bre
akpoint+0x4
panic(c08ce39b,c1584ea0,c04fa890,8,c04faa52,a,6,80,100,fffffeff) at netbsd:panic
+0x1b2
evtchn_do_event(f,cdcb3ac0,cdcb3a78,0,fatal page fault in supervisor mode
trap type 6 code 0 eip c04e7411 cs 10009 eflags 10046 cr2 cb1a6000 ilevel 8
kernel: supervisor trap page fault, code=0

Faulted in DDB; continuing...
db> 

Regards,
-- Kazushi
If a 6600 used paper tape instead of core memory, it would use up tape
at about 30 miles/second.
                -- Grishman, Assembly Language Programming