From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Tue, 5 Aug 2003 16:54:03 +0100 (IST) From: Mel Gorman Subject: Re: anonymous buffer pages In-Reply-To: Message-ID: References: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org Return-Path: To: "Raghu R. Arur" Cc: kernelnewbies@nl.linux.org, linux-mm@kvack.org List-ID: On Tue, 5 Aug 2003, Raghu R. Arur wrote: > when are anonymous buffer pages created and how are they removed from > the system in linux 2.4.19 ? Buried in http://www.skynet.ie/~mel/projects/vm/guide/html/understand/node70.html#SECTION001533000000000000000 is "An anonymous page may have associated buffers if it is backed by a swap file." The reason being that the page will need to be written out in block-sized chunks. Once written out, the page->buffers will be null again and it'll be cleared out the normal way via the swap cache when all processes have unmapped the page -- Mel Gorman http://www.csn.ul.ie/~mel -- 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