Re: [Qemu-devel] [PULL 00/26] Migration pull request

[Juan Quintela]

Peter Maydell <address@hidden> wrote:
> On 1 July 2015 at 11:39, Juan Quintela <address@hidden> wrote:
>> Hi
>>
>> This series includes:
>> - rdma fixes by Dave
>> - rdma memory fix by gonglei
>> - vmdescription for old machine types (dave)
>> - fix footers for power (dave)
>> - migration bitmap extensions (Li)
>>   just fixed the compilation issues for linux-users
>> - migration events (me)
>> - optional secttions (me)
>> - global  configuration (me)
>>
>>
>> Please, Apply.
>>
>>
>> The following changes since commit d2966f804d70a244f5dde395fc5d22a50ed3e74e:
>>
>>   Merge remote-tracking branch
>> 'remotes/vivier/tags/pull-m68k-20150629' into staging (2015-06-29
>> 17:03:20 +0100)
>>
>> are available in the git repository at:
>>
>>   git://github.com/juanquintela/qemu.git tags/migration/20150701
>>
>> for you to fetch changes up to a4fe58b0ea0d78f92461607f4f90be3384fa30e5:
>>
>>   migration: Add migration events on target side (2015-07-01 12:35:05 +0200)
>>
>> ----------------------------------------------------------------
>> migration/next for 20150701
>
> On OSX at least every QEMU executable aborts immediately
> with "qemu: qemu_mutex_lock: Invalid argument". Here's a backtrace:
>
> #0  0x00007fff92c29286 in __pthread_kill ()
> #1  0x00007fff8a4f342f in pthread_kill ()
> #2  0x00007fff9240eb53 in abort ()
> #3  0x00000001002b0915 in error_exit (err=<value temporarily
> unavailable, due to optimizations>, msg=<value temporarily
> unavailable, due to optimizations>) at
> /Users/pm215/src/qemu/util/qemu-thread-posix.c:48
> #4  0x00000001002b095d in qemu_mutex_lock (mutex=<value temporarily
> unavailable, due to optimizations>) at
> /Users/pm215/src/qemu/util/qemu-thread-posix.c:75
> #5  0x0000000100050f20 in migration_bitmap_extend (old=0, new=32768)
> at /Users/pm215/src/qemu/migration/ram.c:1068
> #6  0x0000000100002a8d in ram_block_add [inlined] () at
> /Users/pm215/src/qemu/exec.c:1407
> #7  0x0000000100002a8d in qemu_ram_alloc_internal (size=<value
> temporarily unavailable, due to optimizations>, max_size=<value
> temporarily unavailable, due to optimizations>, resized=<value
> temporarily unavailable, due to optimizations>, host=<value
> temporarily unavailable, due to optimizations>, resizeable=false,
> mr=0x100e97320, errp=<value temporarily unavailable, due to
> optimizations>) at /Users/pm215/src/qemu/exec.c:1537
> #8  0x0000000100002e71 in qemu_ram_alloc (size=1823, mr=0x100e97320,
> errp=<value temporarily unavailable, due to optimizations>) at
> /Users/pm215/src/qemu/exec.c:1554
> #9  0x000000010004353f in memory_region_init_ram (mr=0x100e97320,
> owner=<value temporarily unavailable, due to optimizations>,
> name=<value temporarily unavailable, due to optimizations>,
> size=134217728, errp=0x0) at /Users/pm215/src/qemu/memory.c:1216
> #10 0x000000010003f10a in allocate_system_memory_nonnuma [inlined] ()
> at /Users/pm215/src/qemu/numa.c:339
> #11 0x000000010003f10a in memory_region_allocate_system_memory
> (mr=0x100e97320, owner=0x6, name=0x0, ram_size=140734799798744) at
> /Users/pm215/src/qemu/numa.c:352
> #12 0x00000001000781cb in pc_memory_init (machine=0x102198630,
> system_memory=0x102199690, below_4g_mem_size=134217728,
> above_4g_mem_size=0, rom_memory=0x100e96de0,
> ram_memory=0x7fff5fbfe4b8, guest_info=<value temporarily unavailable,
> due to optimizations>) at /Users/pm215/src/qemu/hw/i386/pc.c:1254
> #13 0x000000010007aae6 in pc_init1 (machine=0x102198630) at
> /Users/pm215/src/qemu/hw/i386/pc_piix.c:182
> #14 0x00000001000e3cf9 in realtime_init [inlined] () at
> /Users/pm215/src/qemu/vl.c:4503
> #15 0x00000001000e3cf9 in qemu_main (argc=<value temporarily
> unavailable, due to optimizations>, argv=<value temporarily
> unavailable, due to optimizations>, envp=0x0) at
> /Users/pm215/src/qemu/vl.c:4505
> #16 0x00000001002117be in -[QemuCocoaAppController
> startEmulationWithArgc:argv:] (self=<value temporarily unavailable,
> due to optimizations>, _cmd=<value temporarily unavailable, due to
> optimizations>, argc=1823, argv=0x102199690) at
> /Users/pm215/src/qemu/ui/cocoa.m:941
>
> A breakpoint on ram_save_setup() is never hit, so it looks
> like the problem is the mutex is being used before it is
> initialized.
>
> thanks
> -- PMM

Why, o why, o why it didn't fail on linux, why.  I think I know where
the problem is.

Thanks for testing.