From mboxrd@z Thu Jan 1 00:00:00 1970 In-reply-to: <20070327001834.04dc375e.akpm@linux-foundation.org> (message from Andrew Morton on Tue, 27 Mar 2007 00:18:34 -0800) Subject: Re: [patch resend v4] update ctime and mtime for mmaped write References: <20070326140036.f3352f81.akpm@linux-foundation.org> <20070326153153.817b6a82.akpm@linux-foundation.org> <20070326232214.ee92d8c4.akpm@linux-foundation.org> <20070326234957.6b287dda.akpm@linux-foundation.org> <20070327001834.04dc375e.akpm@linux-foundation.org> Message-Id: From: Miklos Szeredi Date: Tue, 27 Mar 2007 10:28:16 +0200 Sender: owner-linux-mm@kvack.org Return-Path: To: akpm@linux-foundation.org Cc: a.p.zijlstra@chello.nl, linux-kernel@vger.kernel.org, linux-mm@kvack.org List-ID: > > But Peter Staubach says a RH custumer has files written thorugh mmap, > > which are not being backed up. > > Yes, I expect the backup problem is the major real-world hurt arising from > this bug. > > But I expect we could adequately plug that problem at munmap()-time. Or, > better, do_wp_page(). As I said - half-assed. > > It's a question if whether the backup problem is the only thing which is hurting > in the real-world, or if people have other problems. > > (In fact, what's wrong with doing it in do_wp_page()? It's rather more expensive, than just toggling a bit. Let me work on it a bit more. I think I can make the current patch more palatable. Miklos -- 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