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Message-ID: <4A4CC2BF.3030809@redhat.com>
Date: Thu, 02 Jul 2009 17:22:55 +0300
From: Avi Kivity <avi@...hat.com>
To: Gregory Haskins <ghaskins@...ell.com>
CC: kvm@...r.kernel.org, linux-kernel@...r.kernel.org, mst@...hat.com,
davidel@...ilserver.org
Subject: Re: [KVM PATCH v8 3/3] KVM: create irqfd-cleanup-wq on demand
On 07/01/2009 07:09 PM, Gregory Haskins wrote:
> We currently create this wq on module_init, which may be wasteful if the
> host never creates a guest that uses irqfd. This patch changes the
> algorithm so that the workqueue is only created when at least one guest
> is using irqfd. The queue is cleaned up when the last guest using irqfd
> is shutdown.
>
> To keep things simple, we only check whether the guest has tried to create
> an irqfd, not whether there are actually irqfds active.
>
> +++ b/include/linux/kvm_host.h
> @@ -144,6 +144,7 @@ struct kvm {
> struct {
> spinlock_t lock;
> struct list_head items;
> + int init:1;
>
Since you're rebasing anyway... change the bitfield to a bool.
--
error compiling committee.c: too many arguments to function
--
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