Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752932Ab3IMDQv (ORCPT ); Thu, 12 Sep 2013 23:16:51 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:60744 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751533Ab3IMDQt (ORCPT ); Thu, 12 Sep 2013 23:16:49 -0400 Date: Thu, 12 Sep 2013 20:17:00 -0700 From: Greg KH To: Fengguang Wu Cc: Peter Hurley , LKML , lkp@01.org, Tejun Heo Subject: Re: increased vmap_area_lock contentions on "n_tty: Move buffers into n_tty_data" Message-ID: <20130913031700.GB23757@kroah.com> References: <20130913005133.GA32479@localhost> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20130913005133.GA32479@localhost> 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: 570 Lines: 19 On Fri, Sep 13, 2013 at 08:51:33AM +0800, Fengguang Wu wrote: > Hi Peter, > > FYI, we noticed much increased vmap_area_lock contentions since this > commit: What does that mean? What is happening, are we allocating/removing more memory now? What type of load were you running that showed this problem? thanks, greg k-h -- 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/