Yang, Lifeng <lifeng.yang@xxxxxxxxxxxxxxxx> 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
