From owner-freebsd-current@FreeBSD.ORG  Thu Nov 24 08:02:39 2005
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From: Massimo Lusetti <massimo@cedoc.mo.it>
To: Scott Long <scottl@samsco.org>
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Date: Thu, 24 Nov 2005 09:02:35 +0100
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Cc: 'Kris Kennaway' <kris@obsecurity.org>, Darren Pilgrim <dmp@bitfreak.org>,
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Subject: Re: em interrupt storm
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On Wed, 2005-11-23 at 16:15 -0700, Scott Long wrote:

> What I've done is vacated the use of irq16 on my machines by disabling
> things like usb and if_em.  This isn't ideal, of course.  The storming
> doesn't usually cause a problem, but it can affect performance,
> especially if USB is involved.  I only do this when I'm testing
> performance, otherwise I leave everything enabled and don't worry about
> it.  4.x won't see this problem since it handles interrupts in the
> more traditional way, but using 4.x also has many other tradeoffs that
> may or may not be worthwhile.

That's good to hear. Thanks for pointing it out Scott.

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