From mboxrd@z Thu Jan  1 00:00:00 1970
From: Alex Williamson <alex.williamson@hp.com>
Subject: Re: [PATCH v3] kvm: Use a bitmap for tracking used GSIs
Date: Wed, 13 May 2009 06:15:56 -0600
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Cc: kvm@vger.kernel.org, sheng.yang@intel.com
To: "Michael S. Tsirkin" <mst@redhat.com>
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On Wed, 2009-05-13 at 10:03 +0300, Michael S. Tsirkin wrote:
> On Tue, May 12, 2009 at 04:07:15PM -0600, Alex Williamson wrote:
> > We're currently using a counter to track the most recent GSI we've
> > handed out.  This quickly hits KVM_MAX_IRQ_ROUTES when using device
> > assignment with a driver that regularly toggles the MSI enable bit.
> 
> BTW, dwhich driver does that? Any idea why?

I've seen it from both e1000e and qla2xxx.  I assumed it was some kind
of interrupt mitigation since the devices seem to work fine otherwise.

Alex