On Wed, Mar 16, 2016 at 07:33:55PM -0500, Eric Sandeen wrote: > I may have lost the thread at this point, with poor Darrick's original > patch submission devolving into a long thread about a NO_HIDE_STALE patch > used at Google, but I don't *think* Ceph ever asked for NO_HIDE_STALE. > > At least I can't find any indication of that. > > Am I missing something? cc'ing Greg on this one in case I am. This came up at dinner after the Linux FAST conference where the Ric Wheeler, some Ceph folks, and I were at dinner, and they were discussing creating a userspace file systems because they couldn't get kernel file system developers to be responsive for their needs. I pointed out what I had implemented at Google for our cluster file system, which includes NO_HIDE_STALE_FL and the BLKDISCARD ioctl to work on ext4 files, both of which I had kept out of tree because they were rejected last time and Ric Wheeler had threated to patch them out of the RHEL kernel if they went in upstream. When Ric indicated that he was now a bit more accepting of these patches now that he was responsible for managing people who needed the functionality, I thought it was time to revisit the topic --- especially since Tao Bao has been using the same patches for their hadoopfs servers, and at the very least I should offer the patches to the Ceph folks to see if they could get them into RHEL, and perhaps take another run at getting the patches upstream. - Ted -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
