Setup: Distribute + Replicate setup with error-gen below locks 

patchset: git://git.sv.gnu.org/gluster.git
signal received: 11
time of crash: 2010-07-07 12:57:45
configuration details:
argp 1
backtrace 1
dlfcn 1
fdatasync 1
libpthread 1
llistxattr 1
setfsid 1
spinlock 1
epoll.h 1
xattr.h 1
st_atim.tv_nsec 1
package-string: glusterfs 3.1.0git
/lib/libc.so.6[0x7f3967571530]
/gluster/31git/lib/glusterfs/3.1.0git/xlator/performance/io-cache.so(ioc_open_cbk+0x218)[0x7f3965459318]
/gluster/31git/lib/glusterfs/3.1.0git/xlator/performance/read-ahead.so(ra_open_cbk+0x1d1)[0x7f39656663b1]
/gluster/31git/lib/glusterfs/3.1.0git/xlator/cluster/distribute.so(dht_fd_cbk+0xe7)[0x7f396587d1f7]
/gluster/31git/lib/glusterfs/3.1.0git/xlator/cluster/replicate.so(afr_open_cbk+0x152)[0x7f3965ab8652]
/gluster/31git/lib/glusterfs/3.1.0git/xlator/protocol/client.so(client3_1_open_cbk+0x204)[0x7f3966110684]
/gluster/31git/lib/libgfrpc.so.0(rpc_clnt_handle_reply+0xab)[0x7f3965ef55db]
/gluster/31git/lib/libgfrpc.so.0(rpc_clnt_notify+0x7b)[0x7f3965ef615b]
/gluster/31git/lib/libgfrpc.so.0(rpc_transport_notify+0x26)[0x7f3965ef19a6]
/gluster/31git/lib/glusterfs/3.1.0git/rpc-transport/socket.so(socket_event_poll_in+0x34)[0x7f3964c1e0a4]
/gluster/31git/lib/glusterfs/3.1.0git/rpc-transport/socket.so(socket_event_handler+0xd8)[0x7f3964c1e198]
/gluster/31git/lib/libglusterfs.so.0[0x7f3967cfe174]
/gluster/31git/sbin/glusterfs(main+0x1da)[0x40401a]
/lib/libc.so.6(__libc_start_main+0xfd)[0x7f396755cabd]
/gluster/31git/sbin/glusterfs[0x4022e9]