Re: [Xen-devel] Reproducible system crash

[Peter Joanes <pjoanes@xxxxxxxxxxx>]

On Wednesday 16 March 2005 18:20, Keir Fraser wrote:
> Someone is attempting to set _PAGE_GLOBAL bit in one of the page-table
> entries.
> XenLinux should never do this -- do you have any suspicious-looking
> modules installed in your kernel that may need fixing?
Nothing that doesn't come with the vanilla sources; lsmod says:
Module                  Size  Used by
pppoatm                 4640  1
nfsd                   92328  9
exportfs                5024  1 nfsd
lockd                  61416  2 nfsd
sunrpc                132676  12 nfsd,lockd
ipt_MASQUERADE          2528  1
iptable_nat            23240  2 ipt_MASQUERADE
ip_conntrack           40340  2 ipt_MASQUERADE,iptable_nat
ipt_REJECT              5632  9
iptable_filter          2752  1
ip_tables              16640  4 
ipt_MASQUERADE,iptable_nat,ipt_REJECT,iptable_filter
bridge                 45944  0
speedtch               10600  0
firmware_class          7552  1 speedtch
usb_atm                13360  2 speedtch
uhci_hcd               30736  0
usbcore               106616  4 speedtch,usb_atm,uhci_hcd
br2684                  7236  0
atm                    37528  5 pppoatm,usb_atm,br2684
ppp_generic            21396  5 pppoatm
slhc                    6304  1 ppp_generic
loop                   12968  0

> It would be interesting to know, if you kill the test that fails above
> in the Xen code, whether your problems all go away. It's the test that
> starts:
>      if ( unlikely(l1v & (_PAGE_GLOBAL|_PAGE_PAT)) )
I commented out that part of memory.c, and it still crashes. This time the end 
of the output is:

open("/usr/lib/wine/apphelp.dll.so", O_RDONLY|O_LARGEFILE) = -1 ENOENT (No 
suchfile or directory)
rt_sigprocmask(SIG_BLOCK, NULL, [RTMIN], 8) = 0
(XEN) (file=extable.c, line=71) Pre-exception: fc530a7e -> fc530b34
(XEN) (file=traps.c, line=463) Page fault: fc530b49 -> fc505d30
(XEN) BUG at domain.c:143
(XEN) CPU:    0
(XEN) EIP:    0808:[<fc505e0e>]
(XEN) EFLAGS: 00011296
(XEN) eax: 00000000   ebx: fcff99e0   ecx: 00000000   edx: 00000000
(XEN) esi: 000e0003   edi: c010a960   ebp: 77acdfa0   esp: fc503f9c
(XEN) ds: 0810   es: 0810   fs: 0810   gs: 0810   ss: 0810
(XEN) Stack trace from ESP=fc503f9c:
(XEN) fc5323c8 fc532467 0000008f 000e0003 [fc505d30] fcff99e0 000e0003 
77ef5ca4
(XEN)        0000007b 00000000 ffffffff c010a960 77acdfa0 00000000 000e0003 
c0109904
(XEN)        00000061 00011246 d2411000 00000069 0000007b 0000007b 0000003b 
00000033
(XEN)        fcff99e0
(XEN) Call Trace from ESP=fc503f9c: [<fc505d30>]

****************************************
CPU0 FATAL TRAP: vector = 6 (invalid operand)
[error_code=0000]
Aieee! CPU0 is toast...
****************************************

Reboot in five seconds...


-       Peter.


-------------------------------------------------------
SF email is sponsored by - The IT Product Guide
Read honest & candid reviews on hundreds of IT Products from real users.
Discover which products truly live up to the hype. Start reading now.
http://ads.osdn.com/?ad_id=6595&alloc_id=14396&op=click
_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxxxx
https://lists.sourceforge.net/lists/listinfo/xen-devel