On Tue, May 06, 2014 at 01:18:20AM -0700, Christoph Hellwig wrote: > On Tue, May 06, 2014 at 01:55:59PM +1000, Dave Chinner wrote: > > > > We reject any filesystem that is mounted with this feature bit set, > > so we don't need to check for it anywhere else. Remove the function > > for checking if the feature bit is set and any code that uses it. > > > > Signed-off-by: Dave Chinner <dchinner@xxxxxxxxxx> > > Looks good, > > Reviewed-by: Christoph Hellwig <hch@xxxxxx> > > If someone at SGI has some spare time for a BugWorks search I'd really > love to figure out of the story behind the shared superblock feature.. http://oss.sgi.com/cgi-bin/gitweb.cgi?p=archive/xfs-import.git;a=commitdiff;h=9ea7d56d2db84bd45183c4ab11903b97c5b9a8e9 tells us that the PV to start looking at is 522678. It's something to do with shared read-only filesystems - I suspect the sb_shared_vn field counts the number of read-only mounts - and my guess is it was for Cellular Irix. i.e. SGI's aborted attempt to make a distributed operating system that left useless crap all through the Irix 6.5 codebase... Cheers, Dve. -- Dave Chinner david@xxxxxxxxxxxxx _______________________________________________ xfs mailing list xfs@xxxxxxxxxxx http://oss.sgi.com/mailman/listinfo/xfs
