From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752572Ab1L3Jxv (ORCPT ); Fri, 30 Dec 2011 04:53:51 -0500 Received: from mx3.mail.elte.hu ([157.181.1.138]:38915 "EHLO mx3.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751431Ab1L3Jxt (ORCPT ); Fri, 30 Dec 2011 04:53:49 -0500 Date: Fri, 30 Dec 2011 10:51:47 +0100 From: Ingo Molnar To: Avi Kivity Cc: Nikunj A Dadhania , peterz@infradead.org, linux-kernel@vger.kernel.org, vatsa@linux.vnet.ibm.com, bharata@linux.vnet.ibm.com Subject: Re: [RFC PATCH 0/4] Gang scheduling in CFS Message-ID: <20111230095147.GA10543@elte.hu> References: <20111219083141.32311.9429.stgit@abhimanyu.in.ibm.com> <20111219112326.GA15090@elte.hu> <87sjke1a53.fsf@abhimanyu.in.ibm.com> <4EF1B85F.7060105@redhat.com> <877h1o9dp7.fsf@linux.vnet.ibm.com> <20111223103620.GD4749@elte.hu> <4EF701C7.9080907@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4EF701C7.9080907@redhat.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-ELTE-SpamScore: -2.0 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-2.0 required=5.9 tests=BAYES_00 autolearn=no SpamAssassin version=3.3.1 -2.0 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org * Avi Kivity wrote: > [...] > > The first part appears to be unrelated to ebizzy itself - it's > the kunmap_atomic() flushing ptes. It could be eliminated by > switching to a non-highmem kernel, or by allocating more PTEs > for kmap_atomic() and batching the flush. Nikunj, please only run pure 64-bit/64-bit combinations - by the time any fix goes upstream and trickles down to distros 32-bit guests will be even less relevant than they are today. Thanks, Ingo