From mboxrd@z Thu Jan 1 00:00:00 1970 From: Roman Zippel Subject: Re: page fault scalability patch V14 [3/7]: i386 universal cmpxchg Date: Wed, 5 Jan 2005 12:51:34 +0100 References: In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200501051251.36879.zippel@linux-m68k.org> Sender: owner-linux-mm@kvack.org Return-Path: To: Christoph Lameter Cc: Linus Torvalds , Hugh Dickins , akpm@osdl.org, Nick Piggin , linux-mm@kvack.org, linux-ia64@vger.kernel.org, linux-kernel@vger.kernel.org List-ID: Hi, On Tuesday 04 January 2005 20:37, Christoph Lameter wrote: > * Provide emulation of cmpxchg suitable for uniprocessor if > build and run on 386. > * Provide emulation of cmpxchg8b suitable for uniprocessor > systems if build and run on 386 or 486. I'm not sure that's such a good idea. This emulation is more expensive as it has to disable interrupts and you already have emulation functions using spinlocks anyway, so why not use them? This way your patch would not just scale up, but also still scale down. bye, Roman -- 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: aart@kvack.org