From: Avi Kivity <avi@redhat.com>
To: Jan Kiszka <jan.kiszka@siemens.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>, kvm <kvm@vger.kernel.org>,
"Michael S. Tsirkin" <mst@redhat.com>
Subject: Re: [RFC][PATCH] KVM: Introduce direct MSI message injection for in-kernel irqchips
Date: Mon, 24 Oct 2011 13:09:13 +0200 [thread overview]
Message-ID: <4EA54759.902@redhat.com> (raw)
In-Reply-To: <4EA53BBF.2010704@siemens.com>
On 10/24/2011 12:19 PM, Jan Kiszka wrote:
> >
> > With the new feature it may be worthwhile, but I'd like to see the whole
> > thing, with numbers attached.
>
> It's not a performance issue, it's a resource limitation issue: With the
> new API we can stop worrying about user space device models consuming
> limited IRQ routes of the KVM subsystem.
>
Only if those devices are in the same process (or have access to the
vmfd). Interrupt routing together with irqfd allows you to disaggregate
the device model. Instead of providing a competing implementation with
new limitations, we need to remove the limitations of the old
implementation.
--
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.
next prev parent reply other threads:[~2011-10-24 11:09 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-10-21 9:19 [RFC][PATCH] KVM: Introduce direct MSI message injection for in-kernel irqchips Jan Kiszka
2011-10-21 9:42 ` Sasha Levin
2011-10-21 11:06 ` Michael S. Tsirkin
2011-10-21 11:51 ` Jan Kiszka
2011-10-21 12:04 ` Michael S. Tsirkin
2011-10-21 13:00 ` Jan Kiszka
2011-10-24 9:45 ` Avi Kivity
2011-10-24 10:19 ` Jan Kiszka
2011-10-24 11:09 ` Avi Kivity [this message]
2011-10-24 12:06 ` Jan Kiszka
2011-10-24 12:43 ` Michael S. Tsirkin
2011-10-24 13:11 ` Jan Kiszka
2011-10-24 13:43 ` Jan Kiszka
2011-10-24 14:40 ` Michael S. Tsirkin
2011-10-24 15:00 ` Jan Kiszka
2011-10-24 16:05 ` Michael S. Tsirkin
2011-10-24 16:10 ` Jan Kiszka
2011-10-24 17:05 ` Michael S. Tsirkin
2011-10-24 17:23 ` Michael S. Tsirkin
2011-10-25 7:24 ` Jan Kiszka
2011-10-25 11:20 ` Michael S. Tsirkin
2011-10-25 11:41 ` Jan Kiszka
2011-10-25 12:05 ` Michael S. Tsirkin
2011-10-25 12:21 ` Jan Kiszka
2011-10-25 13:29 ` Michael S. Tsirkin
2011-10-24 14:25 ` Michael S. Tsirkin
2011-10-25 7:56 ` Avi Kivity
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