linux-ext4 - Re: [ext3][kernels >= 2.6.20.7 at least] KDE going comatose when FS is under heavy write load (massive starvation)

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Message-ID: <Pine.LNX.4.64.0704282242280.16099@artax.karlin.mff.cuni.cz>
Date:	Sat, 28 Apr 2007 22:46:27 +0200 (CEST)
From:	Mikulas Patocka <mikulas@...ax.karlin.mff.cuni.cz>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Mike Galbraith <efault@....de>,
	LKML <linux-kernel@...r.kernel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Jens Axboe <jens.axboe@...cle.com>,
	"linux-ext4@...r.kernel.org" <linux-ext4@...r.kernel.org>
Subject: Re: [ext3][kernels >= 2.6.20.7 at least] KDE going comatose when FS
 is under heavy write load (massive starvation)

> hm, fsync.
>
> Aside: why the heck do applications think that their data is so important
> that they need to fsync it all the time.  I used to run a kernel on my
> laptop which had "return 0;" at the top of fsync() and fdatasync().  Most
> pleasurable.
>
> But wedging for 20 minutes is probably excessive punishment.

I most wonder, why vim fsyncs its swapfile regularly (blocking typing 
during that) and doesn't fsync the resulting file on :w  :-/

Mikulas
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