Re: [Patch 5/7] synchronous block I/O delays

Arjan van de Ven
2006-02-28T08:11:13Z

> Our intent was to get an idea of user-initiated sync block I/O because
> there is some expectation from user space that a higher I/O priority will
> result in lower delays for such I/O. General throttling writes wouldn't
> fit in
> this category though msync and O_SYNC would.
>
> Are there a lot of other paths you see ? I'll root around more but if you
> could just list a few more, it'll help.

unmount
-o sync mounts
last-close kind of syncs on block devices (yes databases do this and
care)
fdatasync()/fsync()
open() (does a read seek, and may even do cluster locking stuff)
flock()