From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pa0-f50.google.com (mail-pa0-f50.google.com [209.85.220.50]) by kanga.kvack.org (Postfix) with ESMTP id D57D56B0038 for ; Mon, 2 Mar 2015 18:10:11 -0500 (EST) Received: by pablj1 with SMTP id lj1so12107927pab.8 for ; Mon, 02 Mar 2015 15:10:11 -0800 (PST) Received: from mail.linuxfoundation.org (mail.linuxfoundation.org. [140.211.169.12]) by mx.google.com with ESMTPS id bi15si18454610pdb.24.2015.03.02.15.10.10 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 02 Mar 2015 15:10:10 -0800 (PST) Date: Mon, 2 Mar 2015 15:10:09 -0800 From: Andrew Morton Subject: Re: [RFC 0/3] hugetlbfs: optionally reserve all fs pages at mount time Message-Id: <20150302151009.2ae58f4430f9f34b81533821@linux-foundation.org> In-Reply-To: <1425077893-18366-1-git-send-email-mike.kravetz@oracle.com> References: <1425077893-18366-1-git-send-email-mike.kravetz@oracle.com> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Mike Kravetz Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, Nadia Yvette Chambers , Davidlohr Bueso , Aneesh Kumar , Joonsoo Kim On Fri, 27 Feb 2015 14:58:08 -0800 Mike Kravetz wrote: > 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. Well OK, but why is this a sufficiently serious problem to justify kernel changes? Please provide enough info for others to be able to understand the value of the change. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org