[Xen-devel] Xen panics while working with xenoprof in dom0

[Dietmar Hahn <dietmar.hahn@xxxxxxxxxxxxxxxxxxx>]

Hi list,

I played with oprofile  and got reproducible  xen panics.
I use SuSE SLES10 SP2 with a xen version 3.2.0_16718_14-0.4.
I do the following steps:
1. Start minios
2. Start oprofile with --passive-domains=minios-domid
3. xm destroy minios-domid
4. shutdown oprofile
This sequence repeated multiple (around 5) times leads to the Xen panic below.
It looks like the allocated memory for the passive domain is not correct 
released.
Is this is a known (and maybe fixed in xen-unstable) issue or a new one?
Thanks.

Dietmar.

alba1 login: xenoprofile_init: ret 0, events 2, xenoprof_is_primary 1
(XEN) Xen BUG at page_alloc.c:414
(XEN) ----[ Xen-3.2.0_16718_14-0.4  x86_64  debug=n  Tainted:    C ]----
(XEN) CPU:    0
(XEN) RIP:    e008:[<ffff828c8010fe55>] alloc_heap_pages+0x205/0x320
(XEN) RFLAGS: 0000000000010286   CONTEXT: hypervisor
(XEN) rax: 00000000ffffffff   rbx: ffff828401dd5300   rcx: 0000000000000004
(XEN) rdx: ffffffff00000000   rsi: 0000ffff00000000   rdi: 0000000000000000
(XEN) rbp: ffff828c80238d60   rsp: ffff828c80227dd8   r8:  ffff828401dd5300
(XEN) r9:  0000000000000030   r10: 0000000000000000   r11: 0000000000000010
(XEN) r12: 0000000000000004   r13: 0000000000000000   r14: 0000000000000001
(XEN) r15: 0000000000000010   cr0: 000000008005003b   cr4: 00000000000026b0
(XEN) cr3: 00000001c507e000   cr2: 00000000005a1a38
(XEN) ds: 0000   es: 0000   fs: 0000   gs: 0000   ss: e010   cs: e008
(XEN) Xen stack trace from rsp=ffff828c80227dd8:
(XEN)    00000000003c8710 0000000000000000 0000000000000300 0000000000000293
(XEN)    ffffffff883b02c0 0000000000000004 0000000000000800 0000000000008030
(XEN)    0000000000000001 0000000000000009 ffff8300bfde6080 ffff828c8010ff94
(XEN)    ffff8300bee1e080 ffff828c8011a61d ffff8300bfdec080 00000000ffffffea
(XEN)    ffffffff883b0480 ffff8300bee1e080 ffffffff883b02c0 ffffffff883b02c0
(XEN)    0000000000000000 ffff828c8011a998 000008000000000d 0000803000000001
(XEN)    00000000befd0000 ffff828c80194071 00000000ffffffda 0000000000000004
(XEN)    ffffffff883b0480 ffffffff883b02c0 ffffffff883b02c0 ffff828c8011b41d
(XEN)    00002ba278e7b0a0 000000000000e033 0000000000000246 00007fff322a2528
(XEN)    ffff8300bfdec080 0000000000000000 ffffffff883b0480 ffffffff883b02c0
(XEN)    ffffffff883b02c0 ffff828c80192169 0000000000000000 ffffffff883b02c0
(XEN)    ffffffff883b02c0 ffffffff883b0480 0000000000000000 0000000000000000
(XEN)    0000000000000296 0000000000000001 0000000000000000 000000000000000a
(XEN)    000000000000001f ffffffff801063ea 000000000000000d ffffffff883b0480
(XEN)    0000000000000004 0000010000000000 ffffffff801063ea 000000000000e033
(XEN)    0000000000000296 ffff880070cffe20 000000000000e02b 0000000000000000
(XEN)    0000000000000000 0000000000000000 0000000000000000 0000000000000000
(XEN)    ffff8300bfdec080
(XEN) Xen call trace:
(XEN)    [<ffff828c8010fe55>] alloc_heap_pages+0x205/0x320
(XEN)    [<ffff828c8010ff94>] alloc_xenheap_pages+0x24/0x80
(XEN)    [<ffff828c8011a61d>] alloc_xenoprof_struct+0x11d/0x1f0
(XEN)    [<ffff828c8011a998>] add_passive_list+0xb8/0x310
(XEN)    [<ffff828c80194071>] toggle_guest_mode+0x21/0x30
(XEN)    [<ffff828c8011b41d>] do_xenoprof_op+0x3ad/0x740
(XEN)    [<ffff828c80192169>] tracing_off+0xb/0x10
(XEN)    
(XEN) 
(XEN) ****************************************
(XEN) Panic on CPU 0:
(XEN) Xen BUG at page_alloc.c:414
(XEN) ****************************************
(XEN) 
(XEN) Reboot in five seconds...

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