linux-kernel - Re: [PATCH v2 2/5] direct-io: don't dirty ITER

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Message-ID: <20141220060130.GA22149@ZenIV.linux.org.uk>
Date:	Sat, 20 Dec 2014 06:01:30 +0000
From:	Al Viro <viro@...IV.linux.org.uk>
To:	Omar Sandoval <osandov@...ndov.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Trond Myklebust <trond.myklebust@...marydata.com>,
	Christoph Hellwig <hch@...radead.org>,
	linux-fsdevel@...r.kernel.org, linux-mm@...ck.org,
	linux-nfs@...r.kernel.org, linux-kernel@...r.kernel.org,
	Ming Lei <ming.lei@...onical.com>
Subject: Re: [PATCH v2 2/5] direct-io: don't dirty ITER_BVEC pages on read

On Fri, Dec 19, 2014 at 07:18:26PM -0800, Omar Sandoval wrote:
> Reads through the iov_iter infrastructure for kernel pages shouldn't be
> dirtied by the direct I/O code.
> 
> This is based on Dave Kleikamp's and Ming Lei's previously posted
> patches.

Umm...  

> +	dio->should_dirty = !iov_iter_is_bvec(iter);

	dio->should_dirty = iter_is_iovec(iter);

perhaps?
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