linux-kernel - Re: [take24 0/6] kevent: Generic event handling mechanism.

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Message-ID: <456B2D2B.9080502@redhat.com>
Date:	Mon, 27 Nov 2006 10:23:39 -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>,
	Alexander Viro <aviro@...hat.com>
Subject: Re: [take24 0/6] kevent: Generic event handling mechanism.

Evgeniy Polyakov wrote:
> 
> With provided patch it is possible to wakeup 'for-free' - just call
> kevent_ctl(ready) with zero number of ready events, so thread will be
> awakened if it was in poll(kevent_fd), kevent_wait() or
> kevent_get_events().

Yes, I realize that.  But I wrote something else:

 >> Rather than mark an existing entry as ready, how about a call to
 >> inject a new ready event?
 >>
 >> This would be useful to implement functionality at userlevel and
 >> still use an event queue to announce the availability.  Without this
 >> type of functionality we'd need to use indirect notification via
 >> signal or pipe or something like that.

This is still something which is wanted.

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