linux-kernel - Re: [patch] clarify AIO_EVENTS

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Message-ID: <20061013142257.GJ4141@kvack.org>
Date:	Fri, 13 Oct 2006 10:22:57 -0400
From:	Benjamin LaHaise <bcrl@...ck.org>
To:	"Chen, Kenneth W" <kenneth.w.chen@...el.com>
Cc:	'Zach Brown' <zach.brown@...cle.com>,
	'Suparna Bhattacharya' <suparna@...ibm.com>,
	"Lahaise, Benjamin C" <benjamin.c.lahaise@...el.com>,
	linux-kernel@...r.kernel.org, 'linux-aio' <linux-aio@...ck.org>
Subject: Re: [patch] clarify AIO_EVENTS_OFFSET constant

On Thu, Oct 12, 2006 at 05:00:24PM -0700, Chen, Kenneth W wrote:
> A clean up patch: I think it is a lot easier to read AIO_EVENTS_OFFSET
> as an offset because of aio_ring at the beginning of a head page, instead
> of doing arithmetic of (event on 2nd page - event on 1st page).

Nak.  Your change fails if aio_ring is not an exact multiple of the 
io_event size due to rounding errors, while the original code rounds 
correctly.

		-ben
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