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

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Message-ID: <4565FA60.9000402@redhat.com>
Date:	Thu, 23 Nov 2006 11:45:36 -0800
From:	Ulrich Drepper <drepper@...hat.com>
To:	Evgeniy Polyakov <johnpol@....mipt.ru>
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.

Evgeniy Polyakov wrote:
> Kernel does not put there a new entry, it is only done inside
> kevent_wait(). Entries are put into queue (in any context), where they can be obtained
> from only kevent_wait() or kevent_get_events().

I know this is how it's done now.  But it is not where it has to end. 
IMO we have to get to a solution where new events are posted to the ring 
buffer asynchronously, i.e., without a thread calling kevent_wait.  And 
then you need the extra parameter and verification.  Even if it's today 
not needed we have to future-proof the interface since it cannot be 
changed once in use.

-- 
➧ Ulrich Drepper ➧ Red Hat, Inc. ➧ 444 Castro St ➧ Mountain View, CA ❖
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