Comment # 13 on bug 949906 from Vitaliy Margolen

Not much more info really.
#0  0x00007fdf8793b0ab in _xbegin () at
../nptl/sysdeps/unix/sysv/linux/x86/hle.h:53
53        asm volatile (".byte 0xc7,0xf8 ; .long 0" : "+a" (ret) :: "memory");
(gdb) up
#1  __lll_lock_elision (futex=0x7fdedeffd700, adapt_count=0x7fdedeffd716,
private=0) at ../nptl/sysdeps/unix/sysv/linux/x86/elision-lock.c:56
56                if ((status = _xbegin()) == _XBEGIN_STARTED)
(gdb) up
#2  0x00007fdf876a4fc9 in inode_ref () from /usr/lib64/libglusterfs.so.0
   0x00007fdf876a4fc4 <+20>:    callq  0x7fdf8767b630 <pthread_mutex_lock@plt>
=> 0x00007fdf876a4fc9 <+25>:    mov    %rbx,%rdi

(gdb) disassemble 0x7fdf8767b630
Dump of assembler code for function pthread_mutex_lock@plt:
   0x00007fdf8767b630 <+0>:     jmpq   *0x2a9bfa(%rip)        # 0x7fdf87925230
<pthread_mutex_lock@got.plt>
   0x00007fdf8767b636 <+6>:     pushq  $0x243
   0x00007fdf8767b63b <+11>:    jmpq   0x7fdf876791f0
(gdb) disassemble 0x7fdf87925230
Dump of assembler code for function pthread_mutex_lock@got.plt:
   0x00007fdf87925230 <+0>:     add    %al,-0x6d(%rdx)
   0x00007fdf87925233 <+3>:     xchg   %ebx,%edi
   0x00007fdf87925235 <+5>:     jg     0x7fdf87925237
<pthread_mutex_lock@got.plt+7>
   0x00007fdf87925237 <+7>:     add    %al,-0x4a(%rsi)