From: "Hua Zhong" Subject: RE: [ext3][kernels >= 2.6.20.7 at least] KDE going comatose when FS is under heavy write load (massive starvation) Date: Fri, 27 Apr 2007 13:05:42 -0700 Message-ID: <03a701c78907$70470f30$50d52d90$@com> References: <1177660767.6567.41.camel@Homer.simpson.net> <20070427013350.d0d7ac38.akpm@linux-foundation.org> <698310e10704270459t7663d39dp977cf055b8db9d2a@mail.gmail.com> <20070427193130.GD5967@schatzie.adilger.int> Mime-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Cc: "'Marat Buharov'" , "'Andrew Morton'" , "'Mike Galbraith'" , "'LKML'" , "'Jens Axboe'" , , "'Alex Tomas'" To: "'Linus Torvalds'" , "'Andreas Dilger'" Return-path: Received: from an-out-0708.google.com ([209.85.132.244]:15991 "EHLO an-out-0708.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757173AbXD0UFz (ORCPT ); Fri, 27 Apr 2007 16:05:55 -0400 Received: by an-out-0708.google.com with SMTP id b33so717245ana for ; Fri, 27 Apr 2007 13:05:54 -0700 (PDT) In-Reply-To: Content-Language: en-us Sender: linux-ext4-owner@vger.kernel.org List-Id: linux-ext4.vger.kernel.org The idea has not died and some NAS/file server vendors have already been doing this for some time. (I am not sure but is WAFS the same thing?) > -----Original Message----- > From: linux-kernel-owner@vger.kernel.org [mailto:linux-kernel- > owner@vger.kernel.org] On Behalf Of Linus Torvalds > Sent: Friday, April 27, 2007 12:51 PM > To: Andreas Dilger > Cc: Marat Buharov; Andrew Morton; Mike Galbraith; LKML; Jens Axboe; > linux-ext4@vger.kernel.org; Alex Tomas > Subject: Re: [ext3][kernels >= 2.6.20.7 at least] KDE going comatose > when FS is under heavy write load (massive starvation) > > > > On Fri, 27 Apr 2007, Andreas Dilger wrote: > > > > It's true that this is a "feature" of ext3 with data=ordered (the > default), > > but I suspect the same thing is now true in reiserfs too. > > Oh, well.. Journalling sucks. > > I was actually _really_ hoping that somebody would come along and tell > everybody that this whole journal-logging is stupid, and that it's just > better to not ever re-write blocks on disk, but instead write to new > blocks with version numbers (and not re-use old blocks until new > versions > are stable on disk). > > There was even somebody who did something like that for a PhD thesis, I > forget the details (and it apparently died when the thesis was > presumably > accepted ;). > > 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/