From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754748Ab1FULwH (ORCPT ); Tue, 21 Jun 2011 07:52:07 -0400 Received: from cantor.suse.de ([195.135.220.2]:36889 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751546Ab1FULwF (ORCPT ); Tue, 21 Jun 2011 07:52:05 -0400 Date: Tue, 21 Jun 2011 13:52:02 +0200 From: Michal Hocko To: Amerigo Wang Cc: linux-kernel@vger.kernel.org, akpm@linux-foundation.org, Randy Dunlap , Andrea Arcangeli , Rik van Riel , Johannes Weiner , KAMEZAWA Hiroyuki , linux-doc@vger.kernel.org, linux-mm@kvack.org Subject: Re: [PATCH v2 1/4] mm: completely disable THP by transparent_hugepage=0 Message-ID: <20110621115201.GD8093@tiehlicka.suse.cz> References: <1308643849-3325-1-git-send-email-amwang@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1308643849-3325-1-git-send-email-amwang@redhat.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 On Tue 21-06-11 16:10:42, Amerigo Wang wrote: > Introduce "transparent_hugepage=0" to totally disable THP. > "transparent_hugepage=never" means setting THP to be partially > disabled, we need a new way to totally disable it. I am wondering why would you like to disable the feature on per-boot basis. Does transparent_hugepage=never bring any measurable overhead? -- Michal Hocko SUSE Labs SUSE LINUX s.r.o. Lihovarska 1060/12 190 00 Praha 9 Czech Republic