RE: [ext3][kernels >= 2.6.20.7 at least] KDE going comatose when FS is under heavy write load (massive starvation)

[Hua Zhong]

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@xxxxxxxxxxxxxxx [mailto:linux-kernel-
> owner@xxxxxxxxxxxxxxx] 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@xxxxxxxxxxxxxxx; 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
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