> On Mar 24, 2016, at 01:28, Gregory Farnum <[email protected]> wrote: > > On Mon, Mar 21, 2016 at 6:02 AM, Yan, Zheng <[email protected]> wrote: >> >>> On Mar 21, 2016, at 18:17, Kenneth Waegeman <[email protected]> >>> wrote: >>> >>> Thanks! As we are using the kernel client of EL7, does someone knows if >>> that client supports it? >>> >> >> fadvise DONTNEED is supported by kernel memory management subsystem. Fadvise >> DONTNEED works for all filesystems (including cephfs kernel client) that use >> page cache. > > Does the kernel pass it through to the OSDs? They take advisory flags > for this kind of thing now as well, which RBD uses for exactly this > (in block form, of course).
No, fadvise DONTNEED syscall is transparent to filesystem driver. Regards Yan, Zheng > > In other news, I created a tracker ticket for ceph-fuse to support it. > http://tracker.ceph.com/issues/15252 > -Greg _______________________________________________ ceph-users mailing list [email protected] http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
