From: Paolo Bonzini <pbonzini@redhat.com>
To: "Gonglei (Arei)" <arei.gonglei@huawei.com>,
"qemu-devel@nongnu.org" <qemu-devel@nongnu.org>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>
Cc: "gleb@redhat.com" <gleb@redhat.com>,
"mst@redhat.com" <mst@redhat.com>,
"avi.kivity@gmail.com" <avi.kivity@gmail.com>,
"Herongguang (Stephen)" <herongguang.he@huawei.com>,
"Huangweidong (C)" <weidong.huang@huawei.com>,
Christian Borntraeger <borntraeger@de.ibm.com>
Subject: Re: [RFC]Two ideas to optimize updating irq routing table
Date: Tue, 25 Mar 2014 13:37:38 +0100 [thread overview]
Message-ID: <53317892.2050506@redhat.com> (raw)
In-Reply-To: <33183CC9F5247A488A2544077AF19020815DA9BD@SZXEMA503-MBS.china.huawei.com>
Il 25/03/2014 04:19, Gonglei (Arei) ha scritto:
> Based on discussions in:
> http://lists.gnu.org/archive/html/qemu-devel/2013-11/threads.html#03322
>
> About KVM_SET_GSI_ROUTING ioctl, I tested changing RCU to SRCU, but unfortunately
> it looks like SRCU's grace period is no better than RCU.
Really? This is not what Christian Borntraeger claimed at
http://permalink.gmane.org/gmane.comp.emulators.kvm.devel/118083 -- in
fact, Andrew Theurer is currently testing a variant of that patch and I
was going to post it for 3.16.
Have you tried synchronize_srcu_expedited? Unlike the RCU variant, you
can use this function.
Paolo
WARNING: multiple messages have this Message-ID (diff)
From: Paolo Bonzini <pbonzini@redhat.com>
To: "Gonglei (Arei)" <arei.gonglei@huawei.com>,
"qemu-devel@nongnu.org" <qemu-devel@nongnu.org>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>
Cc: "Huangweidong (C)" <weidong.huang@huawei.com>,
"gleb@redhat.com" <gleb@redhat.com>,
"mst@redhat.com" <mst@redhat.com>,
Christian Borntraeger <borntraeger@de.ibm.com>,
"avi.kivity@gmail.com" <avi.kivity@gmail.com>,
"Herongguang (Stephen)" <herongguang.he@huawei.com>
Subject: Re: [Qemu-devel] [RFC]Two ideas to optimize updating irq routing table
Date: Tue, 25 Mar 2014 13:37:38 +0100 [thread overview]
Message-ID: <53317892.2050506@redhat.com> (raw)
In-Reply-To: <33183CC9F5247A488A2544077AF19020815DA9BD@SZXEMA503-MBS.china.huawei.com>
Il 25/03/2014 04:19, Gonglei (Arei) ha scritto:
> Based on discussions in:
> http://lists.gnu.org/archive/html/qemu-devel/2013-11/threads.html#03322
>
> About KVM_SET_GSI_ROUTING ioctl, I tested changing RCU to SRCU, but unfortunately
> it looks like SRCU's grace period is no better than RCU.
Really? This is not what Christian Borntraeger claimed at
http://permalink.gmane.org/gmane.comp.emulators.kvm.devel/118083 -- in
fact, Andrew Theurer is currently testing a variant of that patch and I
was going to post it for 3.16.
Have you tried synchronize_srcu_expedited? Unlike the RCU variant, you
can use this function.
Paolo
next prev parent reply other threads:[~2014-03-25 23:06 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-03-25 3:19 [RFC]Two ideas to optimize updating irq routing table Gonglei (Arei)
2014-03-25 3:19 ` [Qemu-devel] " Gonglei (Arei)
2014-03-25 12:37 ` Paolo Bonzini [this message]
2014-03-25 12:37 ` Paolo Bonzini
2014-03-26 8:16 ` Christian Borntraeger
2014-03-26 8:16 ` [Qemu-devel] " Christian Borntraeger
2014-03-26 8:39 ` Gonglei (Arei)
2014-03-26 8:39 ` [Qemu-devel] " Gonglei (Arei)
2014-03-26 8:22 ` Gonglei (Arei)
2014-03-26 8:22 ` [Qemu-devel] " Gonglei (Arei)
2014-03-26 9:37 ` Paolo Bonzini
2014-03-26 9:37 ` [Qemu-devel] " Paolo Bonzini
2014-03-26 11:14 ` Christian Borntraeger
2014-03-26 11:14 ` [Qemu-devel] " Christian Borntraeger
2014-03-26 11:45 ` Michael S. Tsirkin
2014-03-26 11:45 ` [Qemu-devel] " Michael S. Tsirkin
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