Yang, Lifeng <lifeng.y...@lenovonetapp.com> wrote:
> I have a question need the consult from the ceph experts. I am the user of
> CephFS, and would like to use the persist memory to accelerate file IO and I
> found long times ago, the FSCache supports the CephFS:
>
> https://lwn.net/Articles/564294/
>
> I wonder if the FSCache support the user mode CephFS accessing? Because I
> just see there is only kernel code update, this is might the easy question
> for you.
Note that fscache is being heavily rewritten at the moment:
https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git/log/?h=fscache-iter
Interfaces now exist that allow it to use direct I/O to the backing filesystem
and avoid the need to try to snoop the waitqueues for backing pages to come
available (which doesn't always appear to work).
David
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