From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Mon, 8 Oct 2007 10:36:42 -0700 (PDT) From: Christoph Lameter Subject: Re: [13/18] x86_64: Allow fallback for the stack In-Reply-To: <200710071735.41386.nickpiggin@yahoo.com.au> Message-ID: References: <20071004035935.042951211@sgi.com> <20071004153940.49bd5afc@bree.surriel.com> <200710071735.41386.nickpiggin@yahoo.com.au> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org Return-Path: To: Nick Piggin Cc: Rik van Riel , Andi Kleen , akpm@linux-foundation.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, travis@sgi.com List-ID: On Sun, 7 Oct 2007, Nick Piggin wrote: > > The problem can become non-rare on special low memory machines doing wild > > swapping things though. > > But only your huge systems will be using huge stacks? I have no idea who else would be using such a feature. Relaxing the tight memory restrictions on stack use may allow placing larger structures on the stack in general. I have some concerns about the medium NUMA systems (a few dozen of nodes) also running out of stack since more data is placed on the stack through the policy layer and since we may end up with a couple of stacked filesystems. Most of the current NUMA systems on x86_64 are basically two nodes on one motherboard. The use of NUMA controls is likely limited there and the complexity of the filesystems is also not high. -- 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