From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Wed, 1 Oct 2003 23:53:30 +0100 (BST) From: Hugh Dickins Subject: Re: page flags In-Reply-To: Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Sender: owner-linux-mm@kvack.org Return-Path: To: "Raghu R. Arur" Cc: kenelnewbies@linux.org, linux-mm@kvack.org List-ID: On Wed, 1 Oct 2003, Raghu R. Arur wrote: > > In 2.4.19 linux, I see that 9th bit of page->flags is not used for any > flag. Is there a particular reason for doing so? Up to 2.4.9 there was #define PG_swap_cache 9, but we deleted that as unnecessary in 2.4.10, changing the PageSwapCache macro. It happens to have stayed free ever since in 2.4, but I don't believe there's a curse on that bit. Hugh -- 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