From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <419D581F.2080302@yahoo.com.au> Date: Fri, 19 Nov 2004 13:19:11 +1100 From: Nick Piggin MIME-Version: 1.0 Subject: Re: fast path for anonymous memory allocation References: In-Reply-To: Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: Christoph Lameter Cc: Hugh Dickins , Benjamin Herrenschmidt , linux-mm@kvack.org, linux-ia64@vger.kernel.org List-ID: Christoph Lameter wrote: > This patch conflicts with the page fault scalability patch but I could not > leave this stone unturned. No significant performance increases so > this is just for the record in case someone else gets the same wild idea. > I had a similar wild idea. Mine was to just make sure we have a spare per-CPU page ready before taking any locks. Ahh, you're doing clear_user_highpage after the pte is already set up? Won't that be racy? I guess that would be an advantage of my approach, the clear_user_highpage can be done first (although that is more likely to be wasteful of cache). -- 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