linux-kernel - Re: [take19 0/4] kevent: Generic event handling mechanism.

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Date:	Wed, 4 Oct 2006 08:55:27 +0400
From:	Evgeniy Polyakov <johnpol@....mipt.ru>
To:	Ulrich Drepper <drepper@...il.com>
Cc:	lkml <linux-kernel@...r.kernel.org>,
	David Miller <davem@...emloft.net>,
	Ulrich Drepper <drepper@...hat.com>,
	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>
Subject: Re: [take19 0/4] kevent: Generic event handling mechanism.

On Tue, Oct 03, 2006 at 09:50:09PM -0700, Ulrich Drepper (drepper@...il.com) wrote:
> On 9/27/06, Evgeniy Polyakov <johnpol@....mipt.ru> wrote:
> \> I have been told in private what is signal masks about - just to wait
> >until either signal or given condition is ready, but in that case just
> >add additional kevent user like AIO complete or netwrok notification
> >and wait until either requested events are ready or signal is triggered.
> 
> No, this won't work.  Yes, I want signal notification as part of the
> event handling.  But there are situations when this is not suitable.
> Only if the signal is expected in the same code using the event
> handling can you do this.  But this is not always possible.
> Especially when the signal handling code is used in other parts of the
> code than the event handling.  E.g., signal handling in a library,
> event handling in the main code.  You cannot assume that all the code
> is completely integrated.

Signals still can be delivered in usual way too.

When we enter sys_ppoll() we specify needed signals as syscall
parameter, with kevents we will add them into the queue.

-- 
	Evgeniy Polyakov
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