Re: [Xen-users] Raid6 Core Dump on FC2 with Xen 2.0.5 Kernel 2.6.10

[Michael Lang <michi+xen@xxxxxxxxxxxxxxxxxxxx>]

On Wed, 2005-05-18 at 14:00 +0100, Mark Williamson wrote:
> > Xen is doing a very good job on my Machine.
> 

Hi Mark,

> Glad to hear it!
> 
> > IÂve started trying some new features like RAID6
> > and so and got following error on trying creating
> > a RAID6 with 5 Devices. Can someone help me out ?
> 
> The RAID6 driver tries to directly use some privileged instructions that a 
> 2.0 
> guest is not allowed to execute - that's why you're getting a General 
> Protection fault.
> 
> This was discussed before - there's some suggestions in this mail from Keir:
> http://lists.xensource.com/archives/html/xen-users/2005-05/msg00154.html
> 
> Summary: should work in -unstable already, will work in 3.0, could be fixed 
> for 2.0 if someone is willing to cook up a patch.

thanks, for your answer ... i was searching/googling for the wrong
phrase ... 

i can also approve that, Xen 2.05 works fine with WhiteboxEnterprise
Linux 4 (equals RH4) on VMWare GSX 3.1 and VMWare Workstation 5.0.
Configuration also worked fine with LVM Root.
On changing one Produktion Server to Xen VMs i encounterd another
usefull way of Xenusage as a side effect ... Honeypot
Started with a missconfiguration, ... got a Trojan, it soon pointed out
to be a very usefull by tracking criminal subjects by using Xen and
sudosh as a honeypot.

Kind Regards 
Michael Lang
Ps.: starting to get unstable running with WB4/EL4

> 
> Cheers,
> Mark
> 
> > $mdadm --create -l 6 -n5 -x1 /dev/Grp_02/RO{1,2,3,4,5}
> >
> > md: bind<dm-15>
> > md: bind<dm-16>
> > md: bind<dm-17>
> > md: bind<dm-18>
> > md: bind<dm-19>
> > raid6: int32x1    753 MB/s
> > raid6: int32x2    899 MB/s
> > raid6: int32x4    591 MB/s
> > raid6: int32x8    591 MB/s
> > general protection fault: 0000 [#1]
> > PREEMPT
> > Modules linked in: raid6 vfat fat bridge ipv6 autofs4 via_rhine iptable_nat
> > ipt_REJECT ipt_LOG ipt_multiport ipt_state ip_conntrack iptable_filter
> > ip_tables sg loop xfs capability commoncap
> > CPU:    0
> > EIP:    0061:[<e0b0bb5d>]    Not tainted VLI
> > EFLAGS: 00011202   (2.6.10-xen0)
> > EIP is at raid6_mmx1_gen_syndrome+0x2d/0xe0 [raid6]
> > eax: da93c000   ebx: da93df38   ecx: 00000001   edx: 00000012
> > esi: 0000000f   edi: da93df38   ebp: d81a3000   esp: da93de90
> > ds: 007b   es: 007b   ss: 0069
> > Process modprobe (pid: 12667, threadinfo=da93c000 task=d5ad0550)
> > Stack: d81a2000 c01207e6 00000000 00000001 c0120505 c052bfc8 00000001
> > 00000000 00000000 c012056d 00000000 c01393f5 c010edde c0105ee1 ffffff88
> > 02fb6bd1 fbfef000 da93df38 da93c000 c01097e7 da93dee4 02fb6bd1 00000001
> > e0b0c310 Call Trace:
> >  [<c01207e6>] tasklet_action+0x56/0xa0
> >  [<c0120505>] __do_softirq+0x95/0xb0
> >  [<c012056d>] do_softirq+0x4d/0x50
> >  [<c01393f5>] irq_exit+0x35/0x40
> >  [<c010edde>] do_IRQ+0x1e/0x30
> >  [<c0105ee1>] evtchn_do_upcall+0x81/0xa0
> >  [<c01097e7>] hypervisor_callback+0x37/0x40
> >  [<e09cb11d>] raid6_select_algo+0xed/0x233 [raid6]
> >  [<e09cb008>] raid6_init+0x8/0x30 [raid6]
> >  [<c0134e92>] sys_init_module+0x182/0x230
> >  [<c0109638>] syscall_call+0x7/0xb
> > Code: 56 53 83 ec 74 8b 94 24 88 00 00 00 8b 9c 24 90 00 00 00 8d 72 fd 8b
> > 44 b3 04 89 04 24 8b 6c b3 08 b8 00 e0 ff ff 21 e0 ff 40 14 <0f> 20 c0 0f
> > 06 89 44 24 70 9b dd 74 24 04 9b 0f 6f 05 40 c7 b1
> >  <6>note: modprobe[12667] exited with preempt_count 2
> > md: personality 8 is not loaded!
> > md: md0 stopped.
> > md: unbind<dm-19>
> > md: export_rdev(dm-19)
> > md: unbind<dm-18>
> > md: export_rdev(dm-18)
> > md: unbind<dm-17>
> > md: export_rdev(dm-17)
> > md: unbind<dm-16>
> > md: export_rdev(dm-16)
> > md: unbind<dm-15>
> > md: export_rdev(dm-15)
> > md: bind<dm-15>
> > md: bind<dm-16>
> > md: bind<dm-17>
> > md: bind<dm-18>
> > md: bind<dm-19>
> > md: personality 8 is not loaded!
> > md: md0 stopped.
> > md: unbind<dm-19>
> > md: export_rdev(dm-19)
> > md: unbind<dm-18>
> > md: export_rdev(dm-18)
> > md: unbind<dm-17>
> > md: export_rdev(dm-17)
> > md: unbind<dm-16>
> > md: export_rdev(dm-16)
> > md: unbind<dm-15>
> > md: export_rdev(dm-15)
> > md: bind<dm-15>
> > md: bind<dm-16>
> > md: bind<dm-17>
> > md: bind<dm-18>
> > md: bind<dm-19>
> >
> >
> > _______________________________________________
> > Xen-users mailing list
> > Xen-users@xxxxxxxxxxxxxxxxxxx
> > http://lists.xensource.com/xen-users
-- 
Michael Lang <michi+xen@xxxxxxxxxxxxxxxxxxxx>


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