From mboxrd@z Thu Jan  1 00:00:00 1970
From: Qing He <qing.he@intel.com>
Subject: Re: [RFC] irq rate limit
Date: Thu, 10 Sep 2009 17:17:38 +0800
Message-ID: <20090910091738.GD25462@ub-qhe2>
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To: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
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On Wed, 2009-09-09 at 22:12 +0800, Konrad Rzeszutek Wilk wrote:
> On Wed, Sep 09, 2009 at 04:48:25PM +0800, Qing He wrote:
> > This is a poc patch of guest irq ratelimit. The main motivation is
> > to ensure Xen's responsiveness during an irq storm, that caused by
> > improper hardware or drivers. If one interrupt is fired at a high
> 
> What kind of hardware exhibits this?

I happened to see this on some network cards using MSI, everything just
hung up. And to some extent, the driver of the device can control this.
If assigned devices of one of the guests behave this way, at least other
guests should still be operable.

Thanks,
Qing