Andrew, Facing some challenges to test this. If you have a chance to test it again, the following output will be interesting to observe. iostat -ctx -p sda 3 > /tmp/iostat.out Also note your system time when this problem occurs, (iostat has time stamp, I wish see the waitQ and activeQ at that time, hopefully captured in the file /tmp/iostat.out above). We need more clarity on the test-case which can reproduce this issue. As I know you are writing into the btrfs. However is that a large number of small files (you are creating new files) OR you are writing a few large new files ? If there is any script to test this that will make understanding a lot easier. PS: Does anybody know Solaris lockstat(1M) equivalent in Linux ? Thanks, Anand -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
