From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Fri, 21 Mar 2008 00:25:02 -0700 (PDT) Message-Id: <20080321.002502.223136918.davem@davemloft.net> Subject: Re: [11/14] vcompound: Fallbacks for order 1 stack allocations on IA64 and x86 From: David Miller In-Reply-To: <20080321061726.782068299@sgi.com> References: <20080321061703.921169367@sgi.com> <20080321061726.782068299@sgi.com> Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org From: Christoph Lameter Date: Thu, 20 Mar 2008 23:17:14 -0700 Return-Path: To: clameter@sgi.com Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org List-ID: > This allows fallback for order 1 stack allocations. In the fallback > scenario the stacks will be virtually mapped. > > Signed-off-by: Christoph Lameter I would be very careful with this especially on IA64. If the TLB miss or other low-level trap handler depends upon being able to dereference thread info, task struct, or kernel stack stuff without causing a fault outside of the linear PAGE_OFFSET area, this patch will cause problems. It will be difficult to debug the kinds of crashes this will cause too. -- 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