From: Avi Kivity <avi@redhat.com>
To: Jan Kiszka <jan.kiszka@siemens.com>
Cc: Alex Williamson <alex.williamson@redhat.com>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
"mtosatti@redhat.com" <mtosatti@redhat.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"yongjie.ren@intel.com" <yongjie.ren@intel.com>,
"tglx@linutronix.de" <tglx@linutronix.de>
Subject: Re: [PATCH] KVM: Use IRQF_ONESHOT for assigned device MSI interrupts
Date: Sun, 03 Jun 2012 11:42:01 +0300 [thread overview]
Message-ID: <4FCB2359.9020505@redhat.com> (raw)
In-Reply-To: <4FC90961.8030701@siemens.com>
On 06/01/2012 09:26 PM, Jan Kiszka wrote:
>
>> you suggesting we need a request_edge_threaded_only_irq() API? Thanks,
>
> I'm just wondering if that restriction for threaded IRQs is really
> necessary for all use cases we have. Threaded MSIs do not appear to me
> like have to be handled that conservatively, but maybe I'm missing some
> detail.
>
btw, I'm hoping we can unthread assigned MSIs. If the delivery is
unicast, we can precalculate everything and all the handler has to do is
set the IRR, KVM_REQ_EVENT, and kick the vcpu. All of these can be done
from interrupt context with just RCU locking.
--
error compiling committee.c: too many arguments to function
next prev parent reply other threads:[~2012-06-03 8:42 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-06-01 16:16 [PATCH] KVM: Use IRQF_ONESHOT for assigned device MSI interrupts Alex Williamson
2012-06-01 16:39 ` Jan Kiszka
2012-06-01 17:03 ` Alex Williamson
2012-06-01 17:14 ` Jan Kiszka
2012-06-01 17:59 ` Alex Williamson
2012-06-01 18:26 ` Jan Kiszka
2012-06-03 8:42 ` Avi Kivity [this message]
2012-06-04 11:21 ` Thomas Gleixner
2012-06-04 11:40 ` Jan Kiszka
2012-06-04 13:07 ` Thomas Gleixner
2012-06-04 13:16 ` Jan Kiszka
2012-06-04 13:22 ` Thomas Gleixner
2012-06-08 7:47 ` Michael S. Tsirkin
2012-06-08 7:55 ` Jan Kiszka
2012-06-08 8:00 ` Michael S. Tsirkin
2012-06-08 8:03 ` Jan Kiszka
2012-06-08 14:39 ` Michael S. Tsirkin
2012-06-08 14:50 ` Jan Kiszka
2012-06-11 10:01 ` Avi Kivity
2012-06-11 10:21 ` Michael S. Tsirkin
2012-06-18 8:46 ` Ren, Yongjie
2012-06-18 11:00 ` Avi Kivity
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