From mboxrd@z Thu Jan  1 00:00:00 1970
From: Christian Borntraeger <borntraeger@de.ibm.com>
Subject: Re: [PATCHv2/RFC] kvm/irqchip: Speed up KVM_SET_GSI_ROUTING
Date: Fri, 17 Jan 2014 09:29:26 +0100
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To: "Michael S. Tsirkin" <mst@redhat.com>, Paolo Bonzini <pbonzini@redhat.com>
Cc: Gleb Natapov <gleb@minantech.com>, KVM <kvm@vger.kernel.org>, linux-s390 <linux-s390@vger.kernel.org>, Cornelia Huck <cornelia.huck@de.ibm.com>, Jens Freimann <jfrei@linux.vnet.ibm.com>, agraf@suse.de
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On 16/01/14 19:56, Michael S. Tsirkin wrote:
> On Thu, Jan 16, 2014 at 02:07:19PM +0100, Paolo Bonzini wrote:
>> Il 16/01/2014 14:06, Christian Borntraeger ha scritto:
>>> Will you edit the patch description or shall I resend the patch?
>>
>> I can edit the commit message.
>>
>> Paolo
> 
> I think we really need to see the effect adding srcu has on interrupt
> injection.

Michael, 
do you have a quick way to check if srcu has a noticeable impact on int
injection on your systems? I am happy with either v2 or v3 of the patch,
but srcu_synchronize_expedited seems to have less latency impact on the 
full system than rcu_synchronize_expedited. This might give Paolo a hint
which of the patches is the right way to go.

Christian