From mboxrd@z Thu Jan 1 00:00:00 1970 From: Raghavendra K T Subject: Re: [PATCH] KVM: avoid unnecessary synchronize_rcu Date: Tue, 19 Aug 2014 20:33:52 +0530 Message-ID: <53F36758.6010302@linux.vnet.ibm.com> References: <1408459556-3098-1-git-send-email-borntraeger@de.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: Paolo Bonzini , KVM , Gleb Natapov , riel@redhat.com, dahi@linux.vnet.ibm.com To: Christian Borntraeger Return-path: Received: from e28smtp05.in.ibm.com ([122.248.162.5]:35090 "EHLO e28smtp05.in.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752610AbaHSPDI (ORCPT ); Tue, 19 Aug 2014 11:03:08 -0400 Received: from /spool/local by e28smtp05.in.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Tue, 19 Aug 2014 20:33:05 +0530 Received: from d28relay02.in.ibm.com (d28relay02.in.ibm.com [9.184.220.59]) by d28dlp02.in.ibm.com (Postfix) with ESMTP id 9B66F394005A for ; Tue, 19 Aug 2014 20:33:02 +0530 (IST) Received: from d28av04.in.ibm.com (d28av04.in.ibm.com [9.184.220.66]) by d28relay02.in.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id s7JF3LqH55836788 for ; Tue, 19 Aug 2014 20:33:22 +0530 Received: from d28av04.in.ibm.com (localhost [127.0.0.1]) by d28av04.in.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id s7JF2q1G027175 for ; Tue, 19 Aug 2014 20:32:53 +0530 In-Reply-To: <1408459556-3098-1-git-send-email-borntraeger@de.ibm.com> Sender: kvm-owner@vger.kernel.org List-ID: On 08/19/2014 08:15 PM, Christian Borntraeger wrote: > We dont have to wait for a grace period if there is no oldpid that > we are going to free. putpid also checks for NULL, so this patch > only fences synchronize_rcu. > > Signed-off-by: Christian Borntraeger Feel free to add: Reviewed-by: Raghavendra K T