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Date: Wed, 3 Oct 2001 21:10:10 -0400 (EDT)
From: jamal <hadi@cyberus.ca>
To: Benjamin LaHaise <bcrl@redhat.com>
cc: <kuznet@ms2.inr.ac.ru>, <mingo@elte.hu>, <linux-kernel@vger.kernel.org>,
        <Robert.Olsson@data.slu.se>, <netdev@oss.sgi.com>,
        <torvalds@transmeta.com>, <alan@lxorguk.ukuu.org.uk>
Subject: Re: [announce] [patch] limiting IRQ load, irq-rewrite-2.4.11-B5
In-Reply-To: <20011003150355.A3780@redhat.com>
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On Wed, 3 Oct 2001, Benjamin LaHaise wrote:

> On Wed, Oct 03, 2001 at 08:53:58PM +0400, kuznet@ms2.inr.ac.ru wrote:
> > Citing my old explanation:
> >
> > >"Polling" is not a real polling in fact, it just accepts irqs as
> > >events waking rx softirq with blocking subsequent irqs.
> > >Actual receive happens at softirq.
> > >
> > >Seems, this approach solves the worst half of livelock problem completely:
> > >irqs are throttled and tuned to load automatically.
> > >Well, and drivers become cleaner.
>
> Well, this sounds like a 2.5 patch.  When do we get to merge it?


It is backward compatible to 2.4 netif_rx() which means it can go in now.
The problem is netdrivers that want to use the interface have to be
morphed.
As a general disclaimer, i really dont mean to put down Ingo's efforts i
just think the irq mitigation idea as is now is wrong for both 2.4 and 2.5

cheers,
jamal

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