On Thu, Sep 17, 2020 at 09:02:34AM +0100, Christoph Hellwig wrote: > On Mon, Sep 14, 2020 at 06:51:23PM -0700, Darrick J. Wong wrote: > > From: Darrick J. Wong <darrick.wong@xxxxxxxxxx> > > > > If someone runs mkfs with rtinherit=1, a realtime volume configured, and > > a protofile that creates a regular file in the filesystem, mkfs will > > error out with "Function not implemented" because userspace doesn't know > > how to allocate extents from the rt bitmap. Catch this specific case > > and hand back a somewhat nicer explanation of what happened. > > Would this be so hard to fix? Probably not, but I'd prefer to see users asking for this feature before porting more code to userspace. I guess I could take a look for 5.10, maybe it's not that difficult. Though given the amount of bitrot and math errors I've seen recently, I get the funny sense that my crash test box and TV are the only things using rt support. --D
