From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Tue, 21 Feb 2006 11:19:58 -0800 (PST) From: Christoph Lameter Subject: Re: [RFC] 0/4 Migration Cache Overview In-Reply-To: <1140547791.5207.21.camel@localhost.localdomain> Message-ID: References: <1140190593.5219.22.camel@localhost.localdomain> <1140195598.5219.77.camel@localhost.localdomain> <43FA8690.3070608@yahoo.com.au> <20060221184016.GA19696@dmt.cnet> <1140547791.5207.21.camel@localhost.localdomain> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org Return-Path: To: Lee Schermerhorn Cc: Christoph Lameter , Marcelo Tosatti , Nick Piggin , linux-mm List-ID: On Tue, 21 Feb 2006, Lee Schermerhorn wrote: > Are the swap ptes used for migrating pages still reserving swap space on > real swap devices? I thought this was what the migration cache was > trying to avoid. Now each running instance of direct migration limits > itself to MIGRATE_CHUNK_SIZE [currently] 256 pages, so if the system has > much swap space at all, this shouldn't place too much of a load on swap > space. But, it does require that one have SOME swap space to migrate, > right? Right. If the kernel configured to not include swap functionality then the kernel will not include page migration capabilities. -- 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