Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261877AbVEPUyO (ORCPT ); Mon, 16 May 2005 16:54:14 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261873AbVEPUyO (ORCPT ); Mon, 16 May 2005 16:54:14 -0400 Received: from serv01.siteground.net ([70.85.91.68]:62114 "EHLO serv01.siteground.net") by vger.kernel.org with ESMTP id S261879AbVEPUxu (ORCPT ); Mon, 16 May 2005 16:53:50 -0400 Date: Mon, 16 May 2005 12:55:39 -0700 (PDT) From: christoph X-X-Sender: christoph@ScMPusgw To: Dave Hansen cc: linux-mm , shai@scalex86.org, Linux Kernel Mailing List Subject: Re: [PATCH] Factor in buddy allocator alignment requirements in node memory alignment In-Reply-To: <1116276439.1005.110.camel@localhost> Message-ID: References: <1116274451.1005.106.camel@localhost> <1116276439.1005.110.camel@localhost> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - serv01.siteground.net X-AntiAbuse: Original Domain - vger.kernel.org X-AntiAbuse: Originator/Caller UID/GID - [0 0] / [47 12] X-AntiAbuse: Sender Address Domain - scalex86.org X-Source: X-Source-Args: X-Source-Dir: Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 869 Lines: 21 On Mon, 16 May 2005, Dave Hansen wrote: > > Because the buddy allocator is complaining about wrongly allocated zones! > > Just because it complains doesn't mean that anything is actually > wrong :) > > Do you know which pieces of code actually break if the alignment doesn't > meet what that warning says? I have seen nothing break but 4 MB allocations f.e. will not be allocated on a 4MB boundary with a 2 MB zone alignment. The page allocator always returnes properly aligned pages but 4MB allocations are an exception? Some present or future hardware device or some other code may find that surprising and crash. - 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/