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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] RE: BUG() w/ HVM win2k3 64b
> We have seen failures with changesets >= 16492, latest tested
> was 16676 that fails, and c/s 16488 passes without issue.
clarification to my email, was thinking that c/s 16491 was the problem
(not 16492 as I indicated),
16492 has failed tests, and 16491 c/s is running fine right now - but
need more test time on that c/s to see if it will fail.
So, just to be clear, still don't have a handle on which specific c/s is
the problem, but still seems around 1649x-ish
Tom
> -----Original Message-----
> From: Woller, Thomas
> Sent: Thursday, January 10, 2008 1:18 PM
> To: xen-devel@xxxxxxxxxxxxxxxxxxx
> Cc: Woller, Thomas
> Subject: BUG() w/ HVM win2k3 64b
>
> We are observing a BUG() with 3.2/unstable. This problem
> takes a number of hours to reproduce - anywhere from 4 to 12+
> hours, and only with windows 2003 64b HVM multi-vcpu guest so
> far under heavy stress load.
>
> Only reproduceable using Shadow Paging, we have not see the
> problem using nested paging.
>
> We have seen failures with changesets >= 16492, latest tested
> was 16676 that fails, and c/s 16488 passes without issue.
>
> We have tried to narrow down the issue to a specific
> changeset, and overnight testing seems to indicate that
> changeset 14692 might be the culprit. Not quite confirmed
> until additional testing completes tomorrow on c/s 14691 and
> 14690. We will know more EOD thursday if these 2 pass testing.
>
> We will startup some testing using 16701 also to make sure
> that it is not resolved with post 16676 patches. I'll also
> try to startup a test with removing c/s 16492 from 16701 base
> and see if that helps this specific problem. All of this
> testing though will not finish till towards end of next week
> due to largescale move of lab/offices starting tomorrow - and
> with 3.2 almost out, would like to see this figured out
> before release.
>
> Reproduced on 1P family11h and family10h systems, but unable
> to reproduce on 2P+ systems so far. We don't believe we are
> seeing any sort of h/w anomoly at this point. have not
> tried reproducing on VT boxes.
>
> We are able to reproduce using 2 64b windows Guests,
> currently we are using 2 or 4 VCPUs, but have not tried
> reducing to single VCPU.
>
> Any debug thoughts are appreciated.
>
> Looks like the dst.mem.seg is invalid for the read() in Grp5
> case 2/4 (jmp/call), which results in the BUG() later.
>
> X86_emulate:
> ...
> case 0xff: /* Grp5 */
> switch ( modrm_reg & 7 )
> {
> case 0: /* inc */
> emulate_1op("inc", dst, _regs.eflags);
> break;
> case 1: /* dec */
> emulate_1op("dec", dst, _regs.eflags);
> break;
> case 2: /* call (near) */
> case 4: /* jmp (near) */
> dst.type = OP_NONE;
> if ( (dst.bytes != 8) && mode_64bit() )
> {
> dst.bytes = op_bytes = 8;
> if ( dst.type == OP_REG )
> dst.val = *dst.reg;
> else if ( (rc = ops->read(dst.mem.seg, dst.mem.off,
> &dst.val, 8, ctxt)) != 0 )
> goto done;
>
>
> Guest config:
> HVM Windows 2003 64b
> vcpus=4
> memory=1024
> pae/acpi/apic=1
>
> BUG() info.
> (XEN) Xen BUG at svm.c:599
> (XEN) ----[ Xen-3.2.0-rc3 x86_64 debug=n Tainted: C ]----
> (XEN) CPU: 2
> (XEN) RIP: e008:[<ffff828c80165205>]
> svm_get_segment_register+0x145/0x170
> (XEN) RFLAGS: 0000000000010292 CONTEXT: hypervisor
> (XEN) rax: ffff8300a6e0ff28 rbx: ffff8300a7dde000 rcx:
> 00000000a6e0fa28
> (XEN) rdx: ffff830b14f09f54 rsi: 00000000a6e0fa28 rdi:
> ffff8300a7ddc080
> (XEN) rbp: ffff830b14f09f54 rsp: ffff8300a6e0f850 r8:
> ffff8300a6e0fc98
> (XEN) r9: ffff8300a6e0f8c8 r10: 0000000000000000 r11:
> 0000000000000001
> (XEN) r12: ffff8300a6e0f8c8 r13: 0000000000000001 r14:
> 00000000a6e0fa28
> (XEN) r15: 0000000000000008 cr0: 0000000080050033 cr4:
> 00000000000006f0
> (XEN) cr3: 000000003b75b000 cr2: 000000000247f000
> (XEN) ds: 0000 es: 0000 fs: 0053 gs: 002b ss: 0000 cs: e008
> (XEN) Xen stack trace from rsp=ffff8300a6e0f850:
> (XEN) ffff830b14f09f54 0000000000000000 ffff828c80178eea
> ffff8300a6e0fc98
> (XEN) ffff828c80179d0c ffff8300a6e0f8d0 ffff8300a6e0fb20
> 0000000000000001
> (XEN) 0000000000000008 ffff8300a6e0fc98 ffff8300a6e0fc98
> 0000000000000004
> (XEN) ffff828c80179e46 0000000000000000 fffffadff3c54040
> fffffadff04cbde0
> (XEN) 0000000000000002 ffff828c801c18e0 0000000000000008
> 0000000000000000
> (XEN) ffff828c80146be5 0000000000000001 ffff8300a6e0ff28
> 000000003a4002e7
> (XEN) 00000002a6e0fb87 ffff8300a6e0fbc8 0000001100000000
> 0000000080a572b0
> (XEN) ffff8300a6e0f9d8 ffff828c801c18e0 0000000000000000
> 0000000000000000
> (XEN) 00000006a6e0fbc8 fffff80000812be8 0000468c8015a2b0
> ffff8300a6e0fb03
> (XEN) 0000000000000296 0000000000000002 ffff8300a7dd2080
> 0000000000000000
> (XEN) ffff828c8013974a 0000000000000000 00000000ffffffff
> ffff830000000046
> (XEN) ffff8300a7dd37e0 fffffadff04cbe00 fffffadff04cbd70
> ffff8300a7dcd7e0
> (XEN) ffff828c80161206 fffff80000341070 fffffadff410d040
> 0000000000000000
> (XEN) fffffadff41171f0 0000000000000080 fffffadff35ce040
> fffff78000000008
> (XEN) 0000000000000000 0000000000000000 fffffadff35ce040
> fffffadff1a73010
> (XEN) fffffadff3699f90 fffffadff3699f90 fffffadff35ce040
> fffffadff3c54040
> (XEN) 0000000000000003 fffff80001272bae 0000000000000000
> 0000000000000246
> (XEN) fffffadff04cbd70 0000000000000000 5555555555555555
> 5555555555555555
> (XEN) 5555555555555555 5555555555555555 00000001801324cd
> 0000000000000004
> (XEN) ffffffffffffffff ffff8300a7ddc080 000fffff80001272
> ffff8300a6e0fba4
> (XEN) Xen call trace:
> (XEN) [<ffff828c80165205>] svm_get_segment_register+0x145/0x170
> (XEN) [<ffff828c80178eea>] hvm_get_seg_reg+0x3a/0x40
> (XEN) [<ffff828c80179d0c>] hvm_translate_linear_addr+0x3c/0xa0
> (XEN) [<ffff828c80179e46>] hvm_read+0x36/0xe0
> (XEN) [<ffff828c80146be5>] x86_emulate+0x3f35/0x9940
> (XEN) [<ffff828c8013974a>] smp_send_event_check_mask+0x3a/0x40
> (XEN) [<ffff828c80161206>] vlapic_write+0x546/0x7e0
> (XEN) [<ffff828c8017f3f5>]
> sh_gva_to_gfn__shadow_4_guest_4+0xc5/0x150
> (XEN) [<ffff828c80152d27>] __hvm_copy+0x97/0x280
> (XEN) [<ffff828c8017f2ba>] guest_walk_tables+0x80a/0x880
> (XEN) [<ffff828c8017a206>] shadow_init_emulation+0x126/0x160
> (XEN) [<ffff828c80182bd5>]
> sh_page_fault__shadow_4_guest_4+0xdb5/0xe80
> (XEN) [<ffff828c80128259>] context_switch+0xb79/0xbc0
> (XEN) [<ffff828c8016753c>] svm_vmexit_handler+0x6ac/0x1a70
> (XEN) [<ffff828c801160bf>] schedule+0x25f/0x290
> (XEN) [<ffff828c8015fcbd>] vlapic_has_pending_irq+0x2d/0x70
> (XEN) [<ffff828c80163dc6>] svm_intr_assist+0x46/0x140
> (XEN) [<ffff828c801692d4>] svm_stgi_label+0x8/0x14
> (XEN)
> (XEN)
> (XEN) ****************************************
> (XEN) Panic on CPU 2:
> (XEN) Xen BUG at svm.c:599
> (XEN) ****************************************
> (XEN)
> (XEN) Manual reset required ('noreboot' specified)
>
> --Tom
>
> thomas.woller@xxxxxxx +1-512-602-0059
> AMD Corporation - Operating Systems Research Center
> 5204 E. Ben White Blvd. UBC1
> Austin, Texas 78741
>
>
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