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Date: Fri, 4 May 2007 19:50:10 -0700
From: "Michael Chan" <mchan@...adcom.com>
To: "David Miller" <davem@...emloft.net>
cc: jeff@...zik.org, netdev@...r.kernel.org
Subject: Re: [PATCH 10/11][TG3]: Reduce spurious interrupts.
David Miller wrote:
> From: "Michael Chan" <mchan@...adcom.com>
> Date: Fri, 04 May 2007 18:45:58 -0700
>
> > We had a discussion about 2 years ago and David decided to
> > remove the I/O read to improve performance. Since then a
> > small number of users have been complaining about spurious
> > interrupts. We can add back the unconditional read or do
> > this detection thing which I agree is somewhat annoying.
> > David, what do you think?
>
> If we get an extra interrupt, we should just silently ignore it.
>
> The performance impact of adding that thing back is just too great.
>
In a small number of cases, we really get a ton of spurious interrupts.
We have even seen the kernel shutting off IRQ7 because of too many
unclaimed spurious interrupts.
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