Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751148AbWA2UJ2 (ORCPT ); Sun, 29 Jan 2006 15:09:28 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751149AbWA2UJ2 (ORCPT ); Sun, 29 Jan 2006 15:09:28 -0500 Received: from kanga.kvack.org ([66.96.29.28]:49026 "EHLO kanga.kvack.org") by vger.kernel.org with ESMTP id S1751148AbWA2UJ2 (ORCPT ); Sun, 29 Jan 2006 15:09:28 -0500 Date: Sun, 29 Jan 2006 15:05:04 -0500 From: Benjamin LaHaise To: Eric Dumazet Cc: Andrew Morton , linux-kernel@vger.kernel.org Subject: Re: [PATCH] i386: instead of poisoning .init zone, change protection bits to force a fault Message-ID: <20060129200504.GD28400@kvack.org> References: <20060128235113.697e3a2c.akpm@osdl.org> <200601291620.28291.ioe-lkml@rameria.de> <20060129113312.73f31485.akpm@osdl.org> <43DD1FDC.4080302@cosmosbay.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <43DD1FDC.4080302@cosmosbay.com> User-Agent: Mutt/1.4.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 767 Lines: 17 On Sun, Jan 29, 2006 at 09:04:44PM +0100, Eric Dumazet wrote: > Chasing some invalid accesses to .init zone, I found that free_init_pages() > was properly freeing the pages but virtual was still usable. This change will break the large table entries up, resulting in more TLB pressure and reducing performance, and so should only be activated as a debug option. -ben -- "Ladies and gentlemen, I'm sorry to interrupt, but the police are here and they've asked us to stop the party." Don't Email: . - 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/