From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrew Morton Subject: Re: page flags ? Date: Wed, 18 May 2005 14:56:44 -0700 Message-ID: <20050518145644.717afc21.akpm@osdl.org> References: <1116450834.26913.1293.camel@dyn318077bld.beaverton.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Cc: linux-mm@kvack.org, linux-fsdevel@vger.kernel.org Return-path: To: Badari Pulavarty In-Reply-To: <1116450834.26913.1293.camel@dyn318077bld.beaverton.ibm.com> Sender: owner-linux-mm@kvack.org List-Id: linux-fsdevel.vger.kernel.org Badari Pulavarty wrote: > > Does anyone know what this page-flag is used for ? I see some > references to this in AFS. > > Is it possible for me to use this for my own use in ext3 ? > (like delayed allocations ?) Any generic routines/VM stuff > expects me to use this only for a specific purpose ? > > #define PG_fs_misc 9 /* Filesystem specific bit */ > It's identical to PG_checked, added by David Howells' provide-a-filesystem-specific-syncable-page-bit.patch IIRC we decided to expand the definition of PG_checked to mean "a_ops-private, fs-defined page flag". I guess if/when that patch is merged we'll do a kernel-wide s/PG_checked/PG_fs_misc/. And ext3 is already using that flag. -- 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