From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from d01relay02.pok.ibm.com (d01relay02.pok.ibm.com [9.56.227.234]) by e5.ny.us.ibm.com (8.12.11/8.12.11) with ESMTP id j5TIhrs3004994 for ; Wed, 29 Jun 2005 14:43:53 -0400 Received: from d01av01.pok.ibm.com (d01av01.pok.ibm.com [9.56.224.215]) by d01relay02.pok.ibm.com (8.12.10/NCO/VERS6.7) with ESMTP id j5TIhrKI258922 for ; Wed, 29 Jun 2005 14:43:53 -0400 Received: from d01av01.pok.ibm.com (loopback [127.0.0.1]) by d01av01.pok.ibm.com (8.12.11/8.13.3) with ESMTP id j5TIhqma031738 for ; Wed, 29 Jun 2005 14:43:52 -0400 Subject: Re: [patch 2] mm: speculative get_page From: Dave Hansen In-Reply-To: <20050629163132.GB13336@elf.ucw.cz> References: <42BF9CD1.2030102@yahoo.com.au> <42BF9D67.10509@yahoo.com.au> <42BF9D86.90204@yahoo.com.au> <42C14662.40809@shadowen.org> <42C14D93.7090303@yahoo.com.au> <1119974566.14830.111.camel@localhost> <20050629163132.GB13336@elf.ucw.cz> Content-Type: text/plain Date: Wed, 29 Jun 2005 11:43:36 -0700 Message-Id: <1120070616.12143.4.camel@localhost> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: Pavel Machek Cc: Nick Piggin , Andy Whitcroft , linux-kernel , Linux Memory Management List-ID: On Wed, 2005-06-29 at 18:31 +0200, Pavel Machek wrote: > > > I think there are a a few ways that bits can be reclaimed if we > > > start digging. swsusp uses 2 which seems excessive though may be > > > fully justified. > > > > They (swsusp) actually don't need the bits at all until suspend-time, at > > all. Somebody coded up a "dynamic page flags" patch that let them kill > > the page->flags use, but it didn't really go anywhere. Might be nice if > > someone dug it up. I probably have a copy somewhere. > > Unfortunately that patch was rather ugly :-(. Do you think the idea was ugly, or just the implementation? Is there something that you'd rather see? -- Dave -- 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