Re: [PATCH 0/5] xfs: various log stuff...

Christoph Hellwig
2021-02-01T12:40:29Z

On Thu, Jan 28, 2021 at 03:41:49PM +1100, Dave Chinner wrote:
> Hi folks,
>
> Quick patch dump for y'all. A couple of minor cleanups to the
> log behaviour, a fix for the CIL throttle hang and a couple of
> patches to rework the cache flushing that journal IO does to reduce
> the number of cache flushes by a couple of orders of magnitude.
>
> All passes fstests with no regressions, no performance regressions
> from fsmark, dbench and various fio workloads, some big gains even
> on fast storage.

Can you elaborate on the big gains? Workloads for one, but also
what kind of storage. For less FUA/flush to matter the device needs
to have a write cache, which none of the really fast SSDs even has.

So I'd only really expect gains from that on consumer grade SSDs and
hard drives.