Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755447Ab3EXUev (ORCPT ); Fri, 24 May 2013 16:34:51 -0400 Received: from mx1.redhat.com ([209.132.183.28]:9166 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752653Ab3EXUeu (ORCPT ); Fri, 24 May 2013 16:34:50 -0400 Date: Fri, 24 May 2013 17:34:32 -0300 From: Marcelo Tosatti To: Xiao Guangrong Cc: gleb@redhat.com, avi.kivity@gmail.com, pbonzini@redhat.com, linux-kernel@vger.kernel.org, kvm@vger.kernel.org Subject: Re: [PATCH v7 04/11] KVM: MMU: zap pages in batch Message-ID: <20130524203432.GB4525@amt.cnet> References: <1369252560-11611-1-git-send-email-xiaoguangrong@linux.vnet.ibm.com> <1369252560-11611-5-git-send-email-xiaoguangrong@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1369252560-11611-5-git-send-email-xiaoguangrong@linux.vnet.ibm.com> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 659 Lines: 17 On Thu, May 23, 2013 at 03:55:53AM +0800, Xiao Guangrong wrote: > Zap at lease 10 pages before releasing mmu-lock to reduce the overload > caused by requiring lock > > After the patch, kvm_zap_obsolete_pages can forward progress anyway, > so update the comments > > [ It improves kernel building 0.6% ~ 1% ] Can you please describe the overload in more detail? Under what scenario is kernel building improved? -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/