Hi folks, This is a series to add the correct constraints to using the on-disk inode flag to enable DAX on per-file basis. The same constraints are placed on setting the flag on directories for inheritance purposes. These constraints are: - the inode flag is limited to regular files or directory inodes. - the S_DAX flag is only ever set on regular files - the flag can only ever be set on filesystems which have blocksize == PAGE_SIZE (for now) - When the flag is set or cleared, the current mapping contents are flushed and then invalidated so that the new access mode starts with an empty mapping. - Setting or clearing the flag is atomic w.r.t. IO and page faults. I've tested these manually with xfs_io (patchset for supporting chattr +x/-x to be sent soon), and it all appears to work as expected. I'd like to push these for 4.5-rc6 so the initial kernel with support for this flag doesn't do silly things, so comments, testing and review woul dbe appreciated. Cheers, Dave. _______________________________________________ xfs mailing list xfs@xxxxxxxxxxx http://oss.sgi.com/mailman/listinfo/xfs
