From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Wed, 28 May 2008 20:40:06 +0200 From: Ingo Molnar Subject: Re: [PATCH] Re: bad pmd ffff810000207238(9090909090909090). Message-ID: <20080528184006.GA14585@elte.hu> References: <483CBCDD.10401@lugmen.org.ar> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Sender: owner-linux-mm@kvack.org Return-Path: To: Hugh Dickins Cc: Fede , Linus Torvalds , Andrew Morton , OGAWA Hirofumi , Jan Engelhardt , Willy Tarreau , Arjan van de Ven , linux-kernel@vger.kernel.org, linux-mm@kvack.org List-ID: * Hugh Dickins wrote: > [PATCH] x86: fix bad pmd ffff810000207xxx(9090909090909090) > > OGAWA Hirofumi and Fede have reported rare pmd_ERROR messages: > mm/memory.c:127: bad pmd ffff810000207xxx(9090909090909090). > > Initialization's cleanup_highmap was leaving alignment filler behind > in the pmd for MODULES_VADDR: when vmalloc's guard page would occupy a > new page table, it's not allocated, and then module unload's vfree > hits the bad 9090 pmd entry left over. applied, nice catch! Ingo -- 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