From mboxrd@z Thu Jan  1 00:00:00 1970
From: Linus Torvalds <torvalds@linux-foundation.org>
Subject: Re: [RFC] situation with csum_and_copy_... API
Date: Fri, 21 Nov 2014 11:40:49 -0800
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Cc: David Laight <David.Laight@aculab.com>,
	Eric Dumazet <eric.dumazet@gmail.com>,
	David Miller <davem@davemloft.net>,
	"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"target-devel@vger.kernel.org" <target-devel@vger.kernel.org>,
	"Nicholas A. Bellinger" <nab@linux-iscsi.org>,
	Christoph Hellwig <hch@infradead.org>
To: Al Viro <viro@zeniv.linux.org.uk>
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On Fri, Nov 21, 2014 at 11:39 AM, Al Viro <viro@zeniv.linux.org.uk> wrote:
>
> I'm not at all sure that _anything_ has valid reasons for draining iovecs.
> Maintaining a struct iov_iter and modifying it is easy and actually faster...

For new code, I agree. But the whole "draining iovec's" is a fairly
common old model.

                  Linus