[Patch] xfs: serialise unaligned direct IOs

[Christoph Hellwig]

On Thu, Nov 03, 2011 at 03:29:18PM +0530, Amit Sahrawat wrote:
> > You probably should keep the original Signoff and reviewed-by tags,
> > and add your editor note on the top into [ ] ?brackets.
> Ok, will do so in the final patch. Actually was unaware of information
> to keep in backported patches?

The standard procedure is to keep patches basically as-is.  This doesn't
quite apply for your case, so I think just adding a comment in 
[ ] brackets on the top is the best you can do.

> > You also need to make the i_mutex unlock and need_i_mutex update
> > conditional here, otherwise you still serialize all O_DIRECT writes.
> >
> you mean, keeping need_i_mutex=0 and mutex_unlock as part of 'else' statement.

Yes.