(gdb) bt
#0  0x0000000000579bdf in JournalingObjectStore::commit_start (this=0x27da000) at os/JournalingObjectStore.cc:196
#1  0x00000000005627df in FileStore::sync_entry (this=0x27da000) at os/FileStore.cc:2281
#2  0x00000000005008ad in FileStore::SyncThread::entry() ()
#3  0x000000000047192a in Thread::_entry_func (arg=0x0) at ./common/Thread.h:39
#4  0x00007f20e7d23971 in start_thread () from /lib/libpthread.so.0
#5  0x00007f20e69bf92d in clone () from /lib/libc.so.6
#6  0x0000000000000000 in ?? ()
(gdb)