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Re: [announce] [patch] limiting IRQ load, irq-rewrite-2.4.11-B5

To: Benjamin LaHaise <bcrl@xxxxxxxxxx>
Subject: Re: [announce] [patch] limiting IRQ load, irq-rewrite-2.4.11-B5
From: jamal <hadi@xxxxxxxxxx>
Date: Wed, 3 Oct 2001 21:10:10 -0400 (EDT)
Cc: <kuznet@xxxxxxxxxxxxx>, <mingo@xxxxxxx>, <linux-kernel@xxxxxxxxxxxxxxx>, <Robert.Olsson@xxxxxxxxxxx>, <netdev@xxxxxxxxxxx>, <torvalds@xxxxxxxxxxxxx>, <alan@xxxxxxxxxxxxxxxxxxx>
In-reply-to: <20011003150355.A3780@redhat.com>
Sender: owner-netdev@xxxxxxxxxxx

On Wed, 3 Oct 2001, Benjamin LaHaise wrote:

> On Wed, Oct 03, 2001 at 08:53:58PM +0400, kuznet@xxxxxxxxxxxxx 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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