From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail191.messagelabs.com (mail191.messagelabs.com [216.82.242.19]) by kanga.kvack.org (Postfix) with ESMTP id 6842C6B003D for ; Thu, 19 Mar 2009 18:16:35 -0400 (EDT) Date: Thu, 19 Mar 2009 23:16:29 +0100 From: Jan Kara Subject: Re: ftruncate-mmap: pages are lost after writing to mmaped file. Message-ID: <20090319221629.GA8687@duck.suse.cz> References: <604427e00903181244w360c5519k9179d5c3e5cd6ab3@mail.gmail.com> <200903200248.22623.nickpiggin@yahoo.com.au> <200903200334.55710.nickpiggin@yahoo.com.au> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Sender: owner-linux-mm@kvack.org To: Linus Torvalds Cc: Nick Piggin , Ying Han , Andrew Morton , linux-kernel , linux-mm , guichaz@gmail.com, Alex Khesin , Mike Waychison , Rohit Seth , Peter Zijlstra List-ID: On Thu 19-03-09 13:21:28, Linus Torvalds wrote: > > > On Thu, 19 Mar 2009, Linus Torvalds wrote: > > > > Ahh, so you re-created it? On ext2 only, or is it visible on ext3 as well? > > I've not even tested - I assumed that I would have to boot into less > > memory and downgrade my filesystem to ext2, which made me hope somebody > > else would pick it up first ;) > > Oh, btw, can people who see this (Ying Han, Nick and apparently Jan) > detail their configurations, please? In particular I'm able to see it only under UML. I've tried to reproduce under normal machine but without luck. My system is single CPU Athlon64. > - SMP? (CONFIG_SMP and how many cores do you have if so?) > > - PREEMPT (NONE/VOLUNTARY or full preempt?) Above two don't exist in UML, but I assume UML behaves basically like full preempt SMP... > - RCU (CLASSIC/TREE/PREEMPT?) RCU is CLASSIC. Honza -- Jan Kara SUSE Labs, CR -- 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