linux-ext4 - Re: [PATCH 09/10] xfs: nowait aio support

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Date:   Sun, 28 May 2017 02:31:13 -0700
From:   Christoph Hellwig <hch@...radead.org>
To:     Goldwyn Rodrigues <rgoldwyn@...e.de>
Cc:     linux-fsdevel@...r.kernel.org, jack@...e.com, hch@...radead.org,
        linux-block@...r.kernel.org, linux-btrfs@...r.kernel.org,
        linux-ext4@...r.kernel.org, linux-xfs@...r.kernel.org,
        axboe@...nel.dk, linux-api@...r.kernel.org,
        adam.manzanares@....com, viro@...iv.linux.org.uk,
        Goldwyn Rodrigues <rgoldwyn@...e.com>
Subject: Re: [PATCH 09/10] xfs: nowait aio support

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.