From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755572AbbCFWNr (ORCPT ); Fri, 6 Mar 2015 17:13:47 -0500 Received: from mga03.intel.com ([134.134.136.65]:8422 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753222AbbCFWNm (ORCPT ); Fri, 6 Mar 2015 17:13:42 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.11,355,1422950400"; d="scan'208";a="695117003" From: Andi Kleen To: Mike Kravetz Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, Andrew Morton , Davidlohr Bueso , Aneesh Kumar , Joonsoo Kim Subject: Re: [PATCH 0/4] hugetlbfs: optionally reserve all fs pages at mount time References: <1425432106-17214-1-git-send-email-mike.kravetz@oracle.com> Date: Fri, 06 Mar 2015 14:13:33 -0800 In-Reply-To: <1425432106-17214-1-git-send-email-mike.kravetz@oracle.com> (Mike Kravetz's message of "Tue, 3 Mar 2015 17:21:42 -0800") Message-ID: <87lhj9ai5u.fsf@tassilo.jf.intel.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Mike Kravetz writes: > hugetlbfs allocates huge pages from the global pool as needed. Even if > the global pool contains a sufficient number pages for the filesystem > size at mount time, those global pages could be grabbed for some other > use. As a result, filesystem huge page allocations may fail due to lack > of pages. What's the difference of this new option to simply doing mount -t hugetlbfs none /huge echo XXX > /proc/sys/vm/nr_hugepages ? -Andi -- ak@linux.intel.com -- Speaking for myself only