Re: [Xen-devel] dump with xen-unstable & linux 3.2.17

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 17.05.12 at 23:20, Ben Guthro <ben@xxxxxxxxxx> wrote:
> I'm attempting to update the Xen I'm using, and am having an issue with S3.
> Konrad - I know you've been down this path before - so I'm hoping you
> might have some insight, given the stack below
> 
> The linux tree also has an older version of Konrad's acpi-s3
> development branches (it was v7)
> 
> Upon resuming from S3 - Xen panics with the following stack. I'm
> guessing it has something to do with some of the pcpu work going on
> recently - but haven't been tracking this too closely, so am not sure.

I don't think that's related, the more that if anything that work
was on the Dom0 kernel side, not the hypervisor (or not
recently).

> The same kernel with Xen 4.0.x works OK.

Anything known regarding 4.1.x?

> (XEN) Assertion '!cpumask_empty(&cpus) && cpumask_test_cpu(cpu,
> &cpus)' failed at sched_credit.c:477

Assuming this is reproducible, could you try to get your serial
console problems sorted out so that you can obtain a full log
(there are quite a few dropped characters here).

At least I can't tell anything from the dumped data alone (other
than the first part of the ASSERT() expression being redundant
with the second part), so I'd also like to ask that you attach (or
make accessible another way) the xen-syms binary corresponding
to the xen.gz one used, so one can locate and analyze individual
variables in the registers and on stack.

Jan

> (XEN) ----[ Xen-4.2-unstable  x86_64  debug=y  Not tainted ]----
> (XEN) CPU:    1
> (XEN) RIP:    e008:[<ffff82c48011a793>] _csched_cpu_pick+0x135/0x552
> (XEN) RFLAGS: 0000000000010002   CONTEXT: hypervisor
> (XEN) rax: 0000000000000001   rbx: 0000000000000010   rcx: 0000000000000010
> (XEN) rdx: 000000ffff   rsi: 0000000000000010   rdi: 0000000000000000
> (XEN) rbp: ffff83013e38fdd8   rsp: ffff83013e38fd08   r8:  0000000000000000
> (XEN) r9:  000000000000003e   r10: ffff82c480232480   r11: 0000000000000246
> (XEN) r12: ffff82c480262820   r13: 0000000000000001   r14: ffff82c4803022e0
> (XEN) r15: ffff83014c6f0068   cr0: 000000008005003b   cr4: 00000000001026f0
> (XEN) cr3: 0000000141a05000   cr2: 0000000000000000
> (XEN) ds: 002b   es: 002b   fs: 0000   gs: 0000   ss: e010   cs: e008
> (XEN) Xen stack trace from rsp=ffff83013e38fd08:
> (XEN)    0100000141a05000 ffff83013e38fd40 0000000000000297 ffff83013e38fd38
> (XEN)    ffff82c480125929 ffff830148ac2000 ffff83013e38fd78 5400000000000002
> (XEN)    0000000000000282 ffff83013e38fd68 ffff82c480125929 ffff830148ac2000
> (XEN)    ffff83013e38fd98 ffff82c48012cd57 0000000000000000 0000000000000008
> (XEN)    0000000000000000 0000000000000000 0000000000000000 0000000000000000
> (XEN)    0000000000000286 ffff83014c6f0068 ffff83014c6f0068 0000000000000001
> (XEN)    ffff82c4803022e0 ffff83014c6f0068 ffff83013e38fde8 ffff82c48011abbe
> (XEN)    ffff83013e38fe58 ffff82c48012399d ffff82c4803022e0 ffff82c4803022e0
> (XEN)    ffff82c4803022e0 ffff8300aa0fd000 00000000000fd060 0000000000000246
> (XEN)    ffff82c4801280c1 ffff8300aa0fd000 ffff82c4803022e0 ffff82c4802ec5c0
> (XEN)    ffff83014c6f0068002dc2e820 ffff83013e38fe88 ffff82c480123c57
> (XEN)    fffffffffffffffe ffff830148a36000 ffff8300aa0fd000 0000000000000000
> (XEN)    ffff83013e38fef8 ffff82c4801063f5 ffff83013e38ff18 ffffffff810030d2
> (XEN)    ffff8300aa0fd000 0000000000000000 ffff83013e38ff08 ffff82c480185ff0
> (XEN)    ffffffff81ab0020 ffff8300aa0fd000 0000000000000001 000000000000
> (XEN)    0000000000000000 ffff88002dc2e820 00007cfec1c700c7 ffff82c480228f78
> (XEN)    ffffffff8100130a 0000000000000018 ffff88002dc2e820 0000000000000000
> (XEN)    0000000000000000 0000000000000001 ffff88002786dda0 ffff88002dc2bdc0
> (XEN)    0000000000000246 00000000ffffffff 0000000000000040 0000000000000000
> (XEN)    0000000000000018 ffffffff8100130a 0000000000000000 0000000000000001
> (XEN) Xen call trace:
> (XEN)    [<ffff82c48011a793>] _csched_cpu_pick+0x135/0x552
> (XEN)    [<ffff82c48011abbe>] csched_cpu_pick+0xe/0x10
> (XEN)    [<ffff82c48012399d>] vcpu_migrate+0x19f/0x346
> (XEN)    [<ffff82c480123c57>] vcpu_force_reschedule+0xa4/0xb6
> (XEN)    [<ffff82c48f5>] do_vcpu_op+0x2c9/0x452
> (XEN)    [<ffff82c480228f78>] syscall_enter+0xc8/0x122
> (XEN)
> (XEN)
> (XEN) ****************************************
> (XEN) Panic on CPU 1:
> (XEN) Assertion '!cpumask_empty(&cpus) && cpumask_test_cpu(cpu,
> &cpus)' failed at sched_credit.c:477
> (XEN) ****************************************
> 
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> http://lists.xen.org/xen-devel 



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