Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751221AbVLLUwc (ORCPT ); Mon, 12 Dec 2005 15:52:32 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751255AbVLLUwc (ORCPT ); Mon, 12 Dec 2005 15:52:32 -0500 Received: from smtp.osdl.org ([65.172.181.4]:34208 "EHLO smtp.osdl.org") by vger.kernel.org with ESMTP id S1751221AbVLLUwb (ORCPT ); Mon, 12 Dec 2005 15:52:31 -0500 Date: Mon, 12 Dec 2005 12:51:57 -0800 (PST) From: Linus Torvalds To: Benjamin Herrenschmidt cc: Andrew Morton , Linux Kernel list , Paul Mackerras , Jens Axboe , Brian King Subject: Re: Memory corruption & SCSI in 2.6.15 In-Reply-To: <1134419609.6989.116.camel@gaston> Message-ID: References: <1134371606.6989.95.camel@gaston> <1134419609.6989.116.camel@gaston> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 846 Lines: 24 [ I applied Brian's patch, so hopefully it was the same issue, and current git doesn't show this problem any more ] On Tue, 13 Dec 2005, Benjamin Herrenschmidt wrote: > > > Also, enabling DEBUG_PAGEALLOC might help, but that's not available on > > powerpc. > > Remind me what is needed to get that working ? Unmapping of linear > mapping pages ? (I suppose I could do that if I also disable using large > pages for it). Yes, basically you'd have to allow the kernel mapping being unmapped one page at a time. And yes, it's inefficient. Don't use it for performance measurements ;) Linus - 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/