I love articles like this! They took the extra step o find the reason for the behavior they saw rather than just saying "yup ...that's how it is". I've also ha

I love articles like this! They took the extra step o find the reason for the behavior they saw rather than just saying "yup ...that's how it is". I've also had multi-millisecond pauses on ext4. In my case, the buffer fills up and we wait for sync_dirty_buffers to do it's job. We tried adjusting the various settings to tune it, but at the end, it's always there. We ended up buffering our own writes in the application so we could get the behavior we wanted.