From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from sc8-sf-mx2-b.sourceforge.net ([10.3.1.92] helo=mail.sourceforge.net) by sc8-sf-list1.sourceforge.net with esmtp (Exim 4.30) id 1EM8yV-0005Wu-Bo for user-mode-linux-devel@lists.sourceforge.net; Sun, 02 Oct 2005 11:54:15 -0700 Received: from lakshmi.addtoit.com ([198.99.130.6] helo=lakshmi.solana.com) by mail.sourceforge.net with esmtp (Exim 4.44) id 1EM8yT-0006Ns-Kc for user-mode-linux-devel@lists.sourceforge.net; Sun, 02 Oct 2005 11:54:15 -0700 From: Jeff Dike Subject: Re: [uml-devel] a question about sigsetjmp() in copy_from/to_user() Message-ID: <20051002183123.GC26063@ccure.user-mode-linux.org> References: <3524bf1f050927070645b999bd@mail.gmail.com> <200509291409.28067.blaisorblade@yahoo.it> <20051002010315.GA4778@localhost.localdomain> <200510021223.15115.blaisorblade@yahoo.it> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200510021223.15115.blaisorblade@yahoo.it> Sender: user-mode-linux-devel-admin@lists.sourceforge.net Errors-To: user-mode-linux-devel-admin@lists.sourceforge.net List-Unsubscribe: , List-Id: The user-mode Linux development list List-Post: List-Help: List-Subscribe: , List-Archive: Date: Sun, 2 Oct 2005 14:31:23 -0400 To: Blaisorblade Cc: user-mode-linux-devel@lists.sourceforge.net, Young Koh On Sun, Oct 02, 2005 at 12:23:14PM +0200, Blaisorblade wrote: > Sorry, any reference will fault, unless it is done on a allocated present > page, which the UML kernel freed but the host didn't. And remember, btw, > you've planned to make this impossible... You are not making any sense t me here. > Sorry, Jeff, which page are you going to evict? It can be a dirty page. Unless > you mean that since that page is still accounted in the FS, Linux will leave > a RAM page free to allow it to be re-read, while still swapping the page. Swapped pages are accounted in the FS all the time and there's obviously no dedicated page left free for them when they are next pulled in. All disk-based filesystems account pages that are on disk and not in memory. tmpfs is no different, except that its disk is the swap partition. Jeff ------------------------------------------------------- This SF.Net email is sponsored by: Power Architecture Resource Center: Free content, downloads, discussions, and more. http://solutions.newsforge.com/ibmarch.tmpl _______________________________________________ User-mode-linux-devel mailing list User-mode-linux-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel