On 02/05/2015 04:22 PM, Christoph Hellwig wrote: > On Thu, Feb 05, 2015 at 04:16:19PM +0200, Boaz Harrosh wrote: >> On 02/03/2015 11:09 PM, Anna Schumaker wrote: >>> The NFS implementation of fallocate() does not support passing the >>> KEEP_SIZE flag by itself, causing tests to randomly fail. >>> >> >> This I do not understand please explain. If all the other FSs just ignore >> a trivial case, then why should NFS not ignore it the same as all >> other filesystems. >> >> Why NFS is allowed to be special. (And apparently break user code xfs >> being an example of one) > > fsx is a test tool. We've never guaranteed that a filesystem needs to > support all or a special subset of fallocate options. > > The NFSv4.2 protocol doesn't support preallocations beyond the file > size, which is something I decided would be to horrible to refit into > the NFS file abstraction when rewriting the preallocation / reservation > section of the spec. Ha OK now I understand. KEEP_SIZE is not supported when allocating blocks. Pity, it is very useful for exactly those that need fallocte like video files. Perhaps in the next version, thanks. Boaz -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
