From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sasha Levin Subject: Re: [PATCH v2 6/8] kvm tools: Add rwlock wrapper Date: Tue, 14 Jun 2011 21:25:22 -0400 Message-ID: <1308101122.3215.6.camel@lappy> References: <20110603193157.GO2333@linux.vnet.ibm.com> <1307130980.2811.4.camel@lappy> <20110603202211.GP2333@linux.vnet.ibm.com> <1307135039.2811.6.camel@lappy> <20110603212028.GS2333@linux.vnet.ibm.com> <1307141685.2867.2.camel@lappy> <20110603230510.GU2333@linux.vnet.ibm.com> <1307168775.27498.2.camel@lappy> <20110604163052.GC6093@linux.vnet.ibm.com> <1308090361.3215.5.camel@lappy> <20110614234226.GR2288@linux.vnet.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: Ingo Molnar , Yinghai Lu , Avi Kivity , Takuya Yoshikawa , Pekka Enberg , kvm@vger.kernel.org, asias.hejun@gmail.com, gorcunov@gmail.com, prasadjoshi124@gmail.com, takuya.yoshikawa@gmail.com To: paulmck@linux.vnet.ibm.com Return-path: Received: from mail-qw0-f46.google.com ([209.85.216.46]:52037 "EHLO mail-qw0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754293Ab1FOBZ1 (ORCPT ); Tue, 14 Jun 2011 21:25:27 -0400 Received: by qwk3 with SMTP id 3so2914736qwk.19 for ; Tue, 14 Jun 2011 18:25:26 -0700 (PDT) In-Reply-To: <20110614234226.GR2288@linux.vnet.ibm.com> Sender: kvm-owner@vger.kernel.org List-ID: On Tue, 2011-06-14 at 16:42 -0700, Paul E. McKenney wrote: > On Tue, Jun 14, 2011 at 06:26:01PM -0400, Sasha Levin wrote: > > Sorry for the delay on this. > > Actually, you might have had excellent timing on this one. > > Could you please try Shaohua Li's patch at: > > https://lkml.org/lkml/2011/6/14/20 > > This patch makes RCU much less prone to causing massive scheduler lock > contention, which might well be the cause of the problems that you > are seeing. This patch has solved the hang issue I've had. kvm tools now boots 60 vcpus easily with 3.0 kernel. -- Sasha.