From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Wed, 7 Nov 2007 10:18:48 -0800 (PST) From: Christoph Lameter Subject: Re: [RFC PATCH 3/10] define page_file_cache In-Reply-To: <20071107131736.437a21e0@bree.surriel.com> Message-ID: References: <20071103184229.3f20e2f0@bree.surriel.com> <20071103185516.24832ab0@bree.surriel.com> <20071106215552.4ab7df81@bree.surriel.com> <20071106221710.3f9b8dd6@bree.surriel.com> <20071107093527.0d312903@bree.surriel.com> <20071107131736.437a21e0@bree.surriel.com> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org Return-Path: To: Rik van Riel Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org List-ID: On Wed, 7 Nov 2007, Rik van Riel wrote: > On Wed, 7 Nov 2007 10:06:10 -0800 (PST) > Christoph Lameter wrote: > > > On Wed, 7 Nov 2007, Rik van Riel wrote: > > > > > How exactly can an anonymous page ever become file backed? > > > > When they get assigned a swap entry. > > That does not change their status. They're still swap backed. If they are swap backed then they have a backing store on disk. They are file backed in some sense. > > > > Do ramfs pages count as memory backed? > > > > > > Since ramfs pages cannot be evicted from memory at all, they > > > should go into the "noreclaim" page set. > > > > Which LRU do they go on. > > With the patch set from last weekend, the file LRU. Argh. > With the patch set later this week, they'll be in the > "noreclaim" page set, which is never scanned by the VM. That sounds better. -- 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