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..
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