From: Gleb Natapov <gleb@redhat.com>
To: Jan Kiszka <jan.kiszka@web.de>
Cc: Avi Kivity <avi@redhat.com>, kvm-devel <kvm@vger.kernel.org>
Subject: Re: assign-dev: Purpose of interrupt_work
Date: Mon, 12 Oct 2009 09:13:10 +0200 [thread overview]
Message-ID: <20091012071310.GT16702@redhat.com> (raw)
In-Reply-To: <4AD2D4B6.7030203@web.de>
On Mon, Oct 12, 2009 at 09:03:18AM +0200, Jan Kiszka wrote:
> Hi,
>
> I was starring at the IRQ delivery path of assigned devices for a while,
> wondering why we have a work queue there. Now, after looking at some
> prehistoric versions, I think the reason is that there once was a mutex
> involved while we now use RCU. Am I right that we could actually drop
> this indirection today?
>
ioapic/pic path still has mutex. If MSIX is used (like it should) we can
drop work queue.
--
Gleb.
next prev parent reply other threads:[~2009-10-12 7:13 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-10-12 7:03 assign-dev: Purpose of interrupt_work Jan Kiszka
2009-10-12 7:13 ` Gleb Natapov [this message]
2009-10-12 7:27 ` Jan Kiszka
2009-10-12 7:45 ` Gleb Natapov
2009-10-12 7:50 ` Jan Kiszka
2009-10-12 7:57 ` Gleb Natapov
2009-10-12 8:16 ` Jan Kiszka
2009-10-12 8:39 ` Gleb Natapov
2009-10-12 9:04 ` Jan Kiszka
2009-10-12 9:14 ` Avi Kivity
2009-10-12 9:25 ` Jan Kiszka
2009-10-12 9:30 ` Avi Kivity
2009-10-12 9:38 ` Gleb Natapov
2009-10-12 9:40 ` Avi Kivity
2009-10-12 9:42 ` Gleb Natapov
2009-10-12 9:14 ` Gleb Natapov
2009-10-12 8:39 ` Avi Kivity
2009-10-12 9:05 ` Gleb Natapov
2009-10-12 9:07 ` Avi Kivity
2009-10-12 9:07 ` Jan Kiszka
2009-10-12 9:16 ` Avi Kivity
2009-10-12 17:36 ` Marcelo Tosatti
2009-10-12 20:44 ` Jan Kiszka
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