[pve-devel] pve-qemu-kvm : internal snasphot async port to qemu 1.7 v3

Stefan Priebe s.priebe at profihost.ag
Sat Nov 30 13:36:35 CET 2013


there are various erros in the implementation / code which does not work 
with current qemu.

I've already fixed 3 - will supply a patch today.

Greets,
Stefan

Am 29.11.2013 21:35, schrieb Stefan Priebe:
> Am 29.11.2013 17:17, schrieb Dietmar Maurer:
>>> Now I get a segfault on savevm...Don't known how to debug it, if
>>> someone can
>>> have a look at it.
>>
>> I can take a look at it next week.
>
> it crashes here:
>
> find_next_bit
> qemu-kvm/util/bitops.c:34
>
> /*
>   * Find the next set bit in a memory region.
>   */
> unsigned long find_next_bit(const unsigned long *addr, unsigned long size,
>                              unsigned long offset)
> {
>
> ...
>
>      if (offset) {
> crash here >>>>>        tmp = *(p++);
>
>
> more details:
>
> Program terminated with signal 11, Segmentation fault.
> #0  0x00007f8e4accfc72 in find_next_bit (addr=0x0, size=83, offset=19)
> at util/bitops.c:34
>
> (gdb) bt
> #0  0x00007f8e4accfc72 in find_next_bit (addr=0x0, size=83, offset=19)
> at util/bitops.c:34
> #1  0x00007f8e4ab9928a in migration_bitmap_find_and_reset_dirty
> (mr=0x7f8e4d660278, start=0)
>      at qemu-kvm/arch_init.c:352
> #2  0x00007f8e4ab9964f in ram_save_block (f=0x7f8e34356050,
> last_stage=true)
>      at qemu-kvm/arch_init.c:465
> #3  0x00007f8e4ab99fe1 in ram_save_complete (f=0x7f8e34356050, opaque=0x0)
>      at qemu-kvm/arch_init.c:742
> #4  0x00007f8e4ac37617 in qemu_savevm_state_complete (f=0x7f8e34356050)
>      at qemu-kvm/savevm.c:1962
> #5  0x00007f8e4ab45cbd in process_savevm_co (opaque=0x0) at
> savevm-async.c:201
> #6  0x00007f8e4a99ef2b in coroutine_trampoline (i0=1312411168, i1=32654)
> at coroutine-ucontext.c:118
> #7  0x00007f8e44d5f020 in ?? () from /lib/x86_64-linux-gnu/libc.so.6
> #8  0x00007fff851758a0 in ?? ()
> #9  0x0000000000000000 in ?? ()
>
> Stefan
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