On Mon, Apr 23, 2007 at 10:27:15PM +0100, Christoph Hellwig wrote:
> On Mon, Apr 23, 2007 at 10:26:16AM +1000, David Chinner wrote:
> >
> > Prevent nfsds for blocking trying to write to a frozen filesystem
> > or a filesystem in the process of freezing.
>
> Looks good for trees actually having support for non-blocking file
> I/O, which doesn't include mainline. (So please don't send this
> upstead)
Yeah - you NACKed that a year ago based on the fact it would never
get used by mainline code:
http://marc.info/?l=linux-nfs&m=114683005119982&w=2
So, given the catch-22 you've just presented us can we revisit the
nfsd non-blocking I/O issue again? This affects anyone using DM
snapshots on their NFS servers and has nothing to do with HSMs
or DMAPI...
FWIW, you can still do non-blocking userspace I/O to a file, so this
XFS patch is still valid for mainline (that's how I tested it).
Cheers,
Dave.
--
Dave Chinner
Principal Engineer
SGI Australian Software Group
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