Re: [PATCH v4 0/8] Introduce the end_syncfs option

On Fri, 27 Feb 2026 at 08:13, Damien Le Moal <[email protected]> wrote:
>
> This patch series introduces the end_syncfs option and adds support for
> it to the main IO engines that can handle regular files.
> This new option improves the precision of file system benchmarks when a
> large number of files are being handled.

This looks excellent to me and I especially like that it now groups
the syncing by the filesystem each file uses. I went through the
ioengine flags and wondered whether absence of FIO_DISKLESSIO was
enough to know that an ioengine would support syncfs but there are
engines (like mmap and sg) that lack FIO_DISKLESSIO but would be
inappropriate so a new flag makes sense.

Out of idle curiosity, what happens if you use the syncfs option when
the file being operated on is a device? Regardless:

Reviewed-by: Sitsofe Wheeler <[email protected]>

--
Sitsofe