Re: [Xen-devel] XSAVE/XRSTOR crash resurgence in 4.3

[Ben Guthro <ben@xxxxxxxxxx>]

On Fri, Jul 5, 2013 at 8:58 AM, Ben Guthro <ben.guthro@xxxxxxxxx> wrote:
> On Jul 5, 2013, at 8:15 AM, Jan Beulich <JBeulich@xxxxxxxx> wrote:
>
>>>>> On 05.07.13 at 14:10, Ben Guthro <ben.guthro@xxxxxxxxx> wrote:
>>> Since I am not in the office today, nor near a machine that I can
>>> access this, I asked someone else to apply and check in this patch, in
>>> the hope that we could get some useful debug info from the weekend
>>> test run.
>>>
>>> However, when he went to test booting a VM with this patch, the host
>>> machine rebooted - presumably a Xen crash.
>>
>> Oops - it's just printing stuff, so I can't immediately see how that
>> would happen. But perhaps a trivial oversight of mine...

Here's the crash with this patch
I'm continuing to look at it, but if something jumps out at you,
please let me know.

(XEN) Assertion 'v == current' failed at
/data/home/bguthro/dev/orc-precise/xen/xen/include:275
(XEN) ----[ Xen-4.3-unstable  x86_64  debug=y  Not tainted ]----
(XEN) CPU:    1
(XEN) RIP:    e008:[<ffff82c4c01a4f65>] xsave+0x178/0x2c7
(XEN) RFLAGS: 0000000000010006   CONTEXT: hypervisor
(XEN) rax: ffff830215860000   rbx: ffff83020904ec00   rcx: ffff83021d63a000
(XEN) rdx: 00000000bfffffff   rsi: 0000000000000003   rdi: ffff83020904ec00
(XEN) rbp: ffff830215867d20   rsp: ffff830215867cd0   r8:  0000000000000000
(XEN) r9:  0000000000000000   r10: 0000000e23c7b646   r11: 0000000000000000
(XEN) r12: ffff8300d0840000   r13: 0000000000000008   r14: ffff830215860000
(XEN) r15: ffff830215867f18   cr0: 0000000080050033   cr4: 00000000001426f0
(XEN) cr3: 000000020bae2000   cr2: 0000000000000000
(XEN) ds: 0000   es: 0000   fs: 0000   gs: 0000   ss: 0000   cs: e008
(XEN) Xen stack trace from rsp=ffff830215867cd0:
(XEN)    ffff830215867df8 ffff830215867d38 ffff82c4c01b4622 ffff830215867d00
(XEN)    ffff83021d63ad80 0000000000000286 00000000000fa933 ffff8300d0840000
(XEN)    0000000000000001 ffff8300d0840000 ffff830215867d60 ffff82c4c0167a1a
(XEN)    ffff830215867d48 ffff830215867dc8 ffff82c4c017019c ffff830215867d98
(XEN)    0000000000000282 ffff8300d04fc000 ffff830215867db0 ffff82c4c0160c80
(XEN)    0000000a1d63ad18 0000000000000000 80000000d0840510 ffff8300d04fc000
(XEN)    ffff8300d072b000 0000000000000001 0000000000000001 ffff83021583d080
(XEN)    ffff830215867e20 ffff82c4c01634bc ffff82c4c01277b9 ffff8300d072b030
(XEN)    0000000000000000 0000000000000000 0000000000000000 0000000000000000
(XEN)    ffff830215867e20 ffff8300d072b000 ffff8300d04fc000 0000000e21f655a0
(XEN)    0000000000000001 ffff83021583d080 ffff830215867eb0 ffff82c4c0124364
(XEN)    0000000000000002 ffff83021583d060 0000000100867e60 ffff83021583d068
(XEN)    ffff82c4c0127824 ffff83021583c028 ffff830215867eb0 ffff8300d04fc000
(XEN)    0000000000989680 ffff82c4c01ab600 ffff8300d072b000 ffff82c4c02f0080
(XEN)    ffff82c4c02f0000 ffff830215860000 ffffffffffffffff ffff83021583d080
(XEN)    ffff830215867ee0 ffff82c4c012710e ffff830215860000 ffff830215860000
(XEN)    00000000ffffff01 0000000000000003 ffff830215867ef0 ffff82c4c0127174
(XEN)    ffff830215867f10 ffff82c4c0160aba ffff8300d072b000 ffff8300d0840000
(XEN)    ffff830215867dc8 0000000000000000 0000000000000000 0000000000000000
(XEN)    0000000000000000 0000000000000080 00000000000001f7 0000000000000000
(XEN) Xen call trace:
(XEN)    [<ffff82c4c01a4f65>] xsave+0x178/0x2c7
(XEN)    [<ffff82c4c0167a1a>] vcpu_save_fpu+0x83/0x159
(XEN)    [<ffff82c4c0160c80>] __context_switch+0x16e/0x50b
(XEN)    [<ffff82c4c01634bc>] context_switch+0x1ba/0xf4e
(XEN)    [<ffff82c4c0124364>] schedule+0x60b/0x61a
(XEN)    [<ffff82c4c012710e>] __do_softirq+0x8e/0x99
(XEN)    [<ffff82c4c0127174>] do_softirq+0x13/0x15
(XEN)    [<ffff82c4c0160aba>] idle_loop+0x68/0x6a
(XEN)
(XEN)
(XEN) ****************************************
(XEN) Panic on CPU 1:
(XEN) Assertion 'v == current' failed at
/data/home/bguthro/dev/orc-precise/xen/xen/include:275
(XEN) ****************************************
(XEN)
(XEN) Reboot in five seconds...
(XEN) Assertion 'current == idle_vcpu[smp_processor_id()]' failed at
domain.c:1494
(XEN) ----[ Xen-4.3-unstable  x86_64  debug=y  Not tainted ]----
(XEN) CPU:    1
(XEN) RIP:    e008:[<ffff82c4c01642cc>] __sync_local_execstate+0x63/0x86
(XEN) RFLAGS: 0000000000010087   CONTEXT: hypervisor
(XEN) rax: ffff830215860000   rbx: 0000000000000001   rcx: 0000000000000001
(XEN) rdx: ffff82c4c026c4a0   rsi: ffff8300d072b000   rdi: ffff830215867a68
(XEN) rbp: ffff8302158679b8   rsp: ffff8302158679a8   r8:  0000000000000004
(XEN) r9:  000000000000000a   r10: 0000000000000020   r11: 000000000000000a
(XEN) r12: 0000000000000082   r13: 00000000000000fd   r14: 0000000000000113
(XEN) r15: ffff830215867f18   cr0: 0000000080050033   cr4: 00000000001426f0
(XEN) cr3: 000000020bae2000   cr2: 0000000000000000
(XEN) ds: 0000   es: 0000   fs: 0000   gs: 0000   ss: 0000   cs: e008
(XEN) Xen stack trace from rsp=ffff8302158679a8:
(XEN)    00000000000000fd ffff830215867a68 ffff8302158679c8 ffff82c4c01860eb
(XEN)    ffff830215867a58 ffff82c4c017019c ffff82c4c024d581 0000000000000086
(XEN)    ffff830215867a48 0000000000000086 ffff830215867a18 ffff82c4c012788c
(XEN)    0000000000000000 8000000015867a28 ffff830215867a28 ffff82c4c01437dc
(XEN)    ffff830215867a58 ffff82c4c0261138 0000000000000082 ffff82c4c02566f0
(XEN)    0000000000000113 ffff830215867f18 00007cfdea798577 ffff82c4c0167bef
(XEN)    ffff830215867f18 0000000000000113 ffff82c4c02566f0 0000000000000082
(XEN)    ffff830215867b58 ffff82c4c0261138 000000000000000a 0000000000000020
(XEN)    000000000000000a 0000000000000004 0000000000000000 0000000000000000
(XEN)    ffff83021583d020 0000000000000082 ffff82c4c0287860 000000fd00000000
(XEN)    ffff82c4c0185be0 000000000000e008 0000000000000246 ffff830215867b18
(XEN)    0000000000000000 ffff82c4c0185bd8 ffff830215867b48 0000138800000061
(XEN)    ffff83021583d020 ffff82c4c0261138 0000000000000082 ffff82c4c02566f0
(XEN)    0000000000000113 ffff830215867f18 ffff830215867bc8 ffff82c4c0143670
(XEN)    ffff830215867ba8 ffff82c400000020 ffff830215867bd8 ffff830215867b88
(XEN)    ffff82c4c024cf6a ffff82c4c024cf6a ffff82c4c02566f0 0000000000000113
(XEN)    0000000000000004 0000000000000061 ffff830215867c28 ffff82c4c024cf6a
(XEN)    ffff830215867c18 ffff82c4c018dde0 ffff830200000000 0000000000000000
(XEN)    fbbc000000000000 044fc20b0f000a7f ffff8300d04fc000 ffff8300d0840000
(XEN)    0000000000000008 ffff830215860000 00007cfdea7983b7 ffff82c4c023020d
(XEN) Xen call trace:
(XEN)    [<ffff82c4c01642cc>] __sync_local_execstate+0x63/0x86
(XEN)    [<ffff82c4c01860eb>] invalidate_interrupt+0x33/0x86
(XEN)    [<ffff82c4c017019c>] do_IRQ+0x9e/0x68d
(XEN)    [<ffff82c4c0167bef>] common_interrupt+0x5f/0x70
(XEN)    [<ffff82c4c0185be0>] machine_restart+0x39/0x208
(XEN)    [<ffff82c4c0143670>] panic+0x120/0x129
(XEN)    [<ffff82c4c018dde0>] do_invalid_op+0x3d7/0x45b
(XEN)    [<ffff82c4c023020d>] handle_exception_saved+0x2e/0x6c
(XEN)    [<ffff82c4c01a4f65>] xsave+0x178/0x2c7
(XEN)    [<ffff82c4c0167a1a>] vcpu_save_fpu+0x83/0x159
(XEN)    [<ffff82c4c0160c80>] __context_switch+0x16e/0x50b
(XEN)    [<ffff82c4c01634bc>] context_switch+0x1ba/0xf4e
(XEN)    [<ffff82c4c0124364>] schedule+0x60b/0x61a
(XEN)    [<ffff82c4c012710e>] __do_softirq+0x8e/0x99
(XEN)    [<ffff82c4c0127174>] do_softirq+0x13/0x15
(XEN)    [<ffff82c4c0160aba>] idle_loop+0x68/0x6a
(XEN)
(XEN)
(XEN) ****************************************
(XEN) Panic on CPU 1:
(XEN) Assertion 'current == idle_vcpu[smp_processor_id()]' failed at
domain.c:1494
(XEN) ****************************************
(XEN)
(XEN) Reboot in five seconds...
(XEN) Resetting with ACPI MEMORY or I/O RESET_REG.


Ben

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