Re: [PATCH 09/10] xfs: nowait aio support

[Christoph Hellwig]

Despite my previous reviewed-by tag this will need another fix:

xfs_file_iomap_begin needs to return EAGAIN if we don't have the extent
list in memoery already.  E.g. something like this:

        if ((flags & IOMAP_NOWAIT) && !(ip->i_d.if_flags & XFS_IFEXTENTS)) {
                error = -EAGAIN;
                goto out_unlock;
        }

right after locking the ilock.