From: Thavatchai Makphaibulchoke Subject: Re: [PATCH v3 0/2] ext4: increase mbcache scalability Date: Wed, 25 Sep 2013 12:43:01 -0600 Message-ID: <52432EB5.1090706@hp.com> References: <52309F27.8060008@redhat.com> <5230D739.9010109@redhat.com> <20130911212523.GE13397@thunk.org> <5230D450.7000609@hp.com> <20130912122317.GC12918@thunk.org> <5232FF3E.7080604@hp.com> <5233609F.7060303@redhat.com> <523886CE.2070203@hp.com> <5239B65E.4060202@redhat.com> <20130921185304.GB8606@thunk.org> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Cc: Theodore Ts'o , Eric Sandeen , T Makphaibulchoke , "linux-ext4@vger.kernel.org List" , "aswin@hp.com" , "aswin_proj@lists.hp.com" To: Andreas Dilger Return-path: Received: from g4t0017.houston.hp.com ([15.201.24.20]:48163 "EHLO g4t0017.houston.hp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751833Ab3IZAqb (ORCPT ); Wed, 25 Sep 2013 20:46:31 -0400 In-Reply-To: Sender: linux-ext4-owner@vger.kernel.org List-ID: On 09/21/2013 05:12 PM, Andreas Dilger wrote: > I just noticed that we have a patch for Lustre that adds a "no_mbcache" mount option to disable mbcache on a per-filesystem basis. > > The newest patch we have is based on FC19 (3.10 kernel), is this something that would be of interest if we submitted it upstream? > > http://review.whamcloud.com/#/c/7263/8/ldiskfs/kernel_patches/patches/fc19/ext4-disable-mb-cache.patch > > Cheers, Andreas > Here are some of the improvement I saw with SELinux disabled. On an 80 core machine, custom 15.5% disk 27.81 fserver 5.33% new_dbase 9.06% new_fserver 5.45% On an 8 core machine, alltests 5.24 custom 2.26 shared 9.32 short 24.08 The rest is not noticably different. Thanks, Mak.