linux-kernel - Re: [PATCH RFC] kvm: enable irq injection from interrupt context

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Message-ID: <4C91E75B.6010704@redhat.com>
Date:	Thu, 16 Sep 2010 11:46:03 +0200
From:	Avi Kivity <avi@...hat.com>
To:	Gleb Natapov <gleb@...hat.com>
CC:	"Michael S. Tsirkin" <mst@...hat.com>,
	Marcelo Tosatti <mtosatti@...hat.com>, kvm@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH RFC] kvm: enable irq injection from interrupt context

  On 09/16/2010 11:25 AM, Gleb Natapov wrote:
> >
> >  MSI only appeared in rhel6, older guests still use level interrupts.
> So they are already slow for other reasons.
>

Exactly, for example they need to exit to userspace to ack the 
interrupt.  That's far slower than the workqueue.


-- 
error compiling committee.c: too many arguments to function

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