Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759594AbZCSVST (ORCPT ); Thu, 19 Mar 2009 17:18:19 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754539AbZCSVSF (ORCPT ); Thu, 19 Mar 2009 17:18:05 -0400 Received: from smtp-out.google.com ([216.239.45.13]:26666 "EHLO smtp-out.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754412AbZCSVSE convert rfc822-to-8bit (ORCPT ); Thu, 19 Mar 2009 17:18:04 -0400 DomainKey-Signature: a=rsa-sha1; s=beta; d=google.com; c=nofws; q=dns; h=mime-version:in-reply-to:references:date:message-id:subject:from:to: cc:content-type:content-transfer-encoding:x-system-of-record; b=Wsd90ty/mzUgB+iNgYupB+TzKCr0M6kPcSOcofg+kEkEF2YBGNDsCy9bpeklLdCYI dIRF4aGKsUvZsoI8OFb9Q== MIME-Version: 1.0 In-Reply-To: References: <604427e00903181244w360c5519k9179d5c3e5cd6ab3@mail.gmail.com> <200903200248.22623.nickpiggin@yahoo.com.au> <200903200334.55710.nickpiggin@yahoo.com.au> Date: Thu, 19 Mar 2009 14:17:57 -0700 Message-ID: <604427e00903191417m2512f0dbl94163093cffce703@mail.gmail.com> Subject: Re: ftruncate-mmap: pages are lost after writing to mmaped file. From: Ying Han To: Linus Torvalds Cc: Nick Piggin , Jan Kara , Andrew Morton , linux-kernel , linux-mm , guichaz@gmail.com, Alex Khesin , Mike Waychison , Rohit Seth , Peter Zijlstra Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8BIT X-System-Of-Record: true Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1207 Lines: 38 On Thu, Mar 19, 2009 at 1:21 PM, 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 > > ?- SMP? (CONFIG_SMP and how many cores do you have if so?) "CONFIG_SMP=y" the testing machine i was using has 16 cores. > > ?- PREEMPT (NONE/VOLUNTARY or full preempt?) CONFIG_PREEMPT_NONE=y # CONFIG_PREEMPT_VOLUNTARY is not set # CONFIG_PREEMPT is not set CONFIG_PREEMPT_BKL=y > > ?- RCU (CLASSIC/TREE/PREEMPT?) Not in my .config file. > > since those affect the kinds of races we can see a lot. > > ? ? ? ? ? ? ? ? ? ? ? ?Linus > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/