I can now reliably reproduce this with fio (see config following email), but never under valgrind so far. James [global] directory=/tmp/fio size=128M ioengine=libaio [randwrite1] rw=randwrite iodepth=32 [randread1] rw=randread iodepth=32 [randwrite2] rw=randwrite iodepth=32 [randread2] rw=randread iodepth=32 -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html