linux-kernel - Re: [PATCH] fallout from atomic_long

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Message-ID: <20061217173201.GA31675@2ka.mipt.ru>
Date:	Sun, 17 Dec 2006 20:32:04 +0300
From:	Evgeniy Polyakov <johnpol@....mipt.ru>
To:	Linus Torvalds <torvalds@...l.org>
Cc:	Al Viro <viro@....linux.org.uk>,
	David Howells <dhowells@...hat.com>,
	"David S. Miller" <davem@...emloft.net>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] fallout from atomic_long_t patch

On Sun, Dec 17, 2006 at 09:24:30AM -0800, Linus Torvalds (torvalds@...l.org) wrote:
> 
> 
> On Sun, 17 Dec 2006, Al Viro wrote:
> > -			if (likely(!test_bit(WORK_STRUCT_PENDING,
> > -					     &__cbq->work.work.management) &&
> > +			if (likely(!work_pending(&__cbq->work.work) &&
> 
> That should properly be
> 
> 	if (likely(!delayed_work_pending(&__cbq->work) && ...
> 
> and why the heck was it doing that open-coded int he first place?
>
> HOWEVER, looking even more, why is that thing a "delayed work" at all? All 
> the queuing seems to happen with a timeout of zero..
> 
> So I _think_ that the proper patch is actually the following, but somebody 
> who knows and uses the connector thing should double-check. Please?

Delayed work was used to play with different timeouts and thus allow to
smooth performance peaks, but then I dropped that idea, so timeout is always
zero.

I posted similar patch today to netdev@, which directly used
work_pending instead of delayed_work_pending(), but if you will figure
this out itself, I'm ok with proposed patch.


> 			Linus

-- 
	Evgeniy Polyakov
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