Re: [Xen-devel] hypervisor crash with latest xen-unstable

[Keir Fraser <keir@xxxxxxx>]

Fixed by xen-unstable:22342.

 K.

On 25/11/2010 10:27, "Juergen Gross" <juergen.gross@xxxxxxxxxxxxxx> wrote:

> Hi,
> 
> latest xen-unstable crashed when I tried to remove a cpu from a cpupool via
> 
> xl cpupool-cpu-remove
> 
> Serial log shows:
> 
> (XEN) Assertion '!(((*({ unsigned long __ptr; __asm__ ("" : "=r"(__ptr) :
> "0"(&per_cpu____preempt_count)); (typeof(&per_cpu____preempt_count)) (__ptr +
> (get_cpu_info()->per_cpu_offset)); }))) ||
> ((irq_stat[(((get_cpu_info()->processor_id)))].__local_irq_count) != 0) ||
> !local_irq_is_enabled())' failed at softirq.c:61
> (XEN) ----[ Xen-4.1-unstable  x86_64  debug=y  Tainted:    C ]----
> (XEN) CPU:    5
> (XEN) RIP:    e008:[<ffff82c4801212f9>] do_softirq+0x51/0x7a
> (XEN) RFLAGS: 0000000000010202   CONTEXT: hypervisor
> (XEN) rax: ffff82c4802ca2a0   rbx: ffff8300780da000   rcx: ffff82c4802a7080
> (XEN) rdx: 00000043b9aefd80   rsi: ffff830839db7ec0   rdi: ffff82c48024d0e0
> (XEN) rbp: ffff830839db7f08   rsp: ffff830839db7f08   r8:  0000000000000005
> (XEN) r9:  0000ffff0000ffff   r10: 00000000deadbeef   r11: 0f0f0f0f0f0f0f0f
> (XEN) r12: ffff8803f8f61440   r13: ffff8803fdf4fe58   r14: 0000000000000000
> (XEN) r15: 00007fff335d7150   cr0: 0000000080050033   cr4: 00000000000026f0
> (XEN) cr3: 0000000846990000   cr2: 0000000000627048
> (XEN) ds: 0000   es: 0000   fs: 0000   gs: 0000   ss: e010   cs: e008
> (XEN) Xen stack trace from rsp=ffff830839db7f08:
> (XEN)    00007cf7c62480c7 ffff82c480202736 00007fff335d7150 0000000000000000
> (XEN)    ffff8803fdf4fe58 ffff8803f8f61440 ffffffffffffffda ffff8803fd491438
> (XEN)    0000000000000216 000000000061e004 000000000061d050 00007f6d701d9f6c
> (XEN)    0000000000000000 ffffffff8000346a 000000000061c2e0 0000000000624004
> (XEN)    00000000deadbeef 0000010000000000 ffffffff8000346a 000000000000e033
> (XEN)    0000000000000216 ffff8803fdf4fd80 000000000000e02b 0000000000000000
> (XEN)    0000000000000000 0000000000000000 0000000000000000 0000000000000005
> (XEN)    ffff8300780da000 00000043b9aefd80 0000000000000000
> (XEN) Xen call trace:
> (XEN)    [<ffff82c4801212f9>] do_softirq+0x51/0x7a
> (XEN)
> 
> I suspect the waitqueue stuff broke the continue_hypercall_on_cpu() stuff.
> 
> 
> Juergen



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