From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx179.postini.com [74.125.245.179]) by kanga.kvack.org (Postfix) with SMTP id 3363A6B0044 for ; Thu, 12 Apr 2012 11:06:49 -0400 (EDT) Date: Thu, 12 Apr 2012 11:06:12 -0400 From: Bob Picco Subject: Re: [PATCH -mm] remove swap token code Message-ID: <20120412150612.GA12549@gw1> References: <20120409113201.6dff571a@annuminas.surriel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20120409113201.6dff571a@annuminas.surriel.com> Sender: owner-linux-mm@kvack.org List-ID: To: Rik van Riel Cc: Andrew Morton , linux-mm@kvack.org, linux-kernel@vger.kernel.org, Johannes Weiner Rik van Riel wrote: [Mon Apr 09 2012, 11:32:01AM EDT] > The swap token code no longer fits in with the current VM model. > It does not play well with cgroups or the better NUMA placement > code in development, since we have only one swap token globally. > > It also has the potential to mess with scalability of the system, > by increasing the number of non-reclaimable pages on the active > and inactive anon LRU lists. > > Last but not least, the swap token code has been broken for a > year without complaints. This suggests we no longer have much > use for it. > > The days of sub-1G memory systems with heavy use of swap are > over. If we ever need thrashing reducing code in the future, > we will have to implement something that does scale. > > Signed-off-by: Rik van Riel Acked-by: Bob Picco -- 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/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: email@kvack.org