linux-kernel - Re: [take25 1/6] kevent: Description.

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Message-ID: <20061124163100.GA21462@2ka.mipt.ru>
Date:	Fri, 24 Nov 2006 19:31:00 +0300
From:	Evgeniy Polyakov <johnpol@....mipt.ru>
To:	Ulrich Drepper <drepper@...hat.com>
Cc:	David Miller <davem@...emloft.net>, Andrew Morton <akpm@...l.org>,
	netdev <netdev@...r.kernel.org>,
	Zach Brown <zach.brown@...cle.com>,
	Christoph Hellwig <hch@...radead.org>,
	Chase Venters <chase.venters@...entec.com>,
	Johann Borck <johann.borck@...sedata.com>,
	linux-kernel@...r.kernel.org, Jeff Garzik <jeff@...zik.org>
Subject: Re: [take25 1/6] kevent: Description.

On Fri, Nov 24, 2006 at 07:14:06PM +0300, Evgeniy Polyakov (johnpol@....mipt.ru) wrote:
> If kernel has put data asynchronously it will setup special flag, thus 
> kevent_wait() will not sleep and will return, so thread will check new
> entries and process them.

For the clarification - only kevent_wait() updates index, userspace
will not detect that it has changed after thread has put there new
data.
In case kernel thread will updated index too, you are correct,
kevent_wait() should get index as parameter.

-- 
	Evgeniy Polyakov
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