If I run this fio jobfile with absolute latest upstream code: [global] directory=/var/tmp [randreads] direct=1 rate_iops=1000 size=512m ioengine=sync bs=4k rw=randread filename=ben.dd runtime=30 write_lat_log=foo It fails with fio: stat.c:1988: get_cur_log: Assertion `iolog->pending->nr_samples < iolog->pending->max_samples' failed. But if I take out the "write_lat_log=foo" line, it succeeds. The assertion seems to be in the code path for latency logs, right? Anyone else seen this? -- To unsubscribe from this list: send the line "unsubscribe fio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html