From: Andrew Morton <akpm@zip.com.au>
To: Aaron Lehmann <aaronl@vitelus.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: ATAPI CD-R lags system to hell burning in DAO mode; but not in TAO
Date: Wed, 31 Jul 2002 14:05:30 -0700 [thread overview]
Message-ID: <3D48511A.C31443A3@zip.com.au> (raw)
In-Reply-To: 20020731203008.GA27702@vitelus.com
Aaron Lehmann wrote:
>
> I've got a Teac CD-W524E 24x CD-R writer, and ever since I got it
> several months ago I have had the somewhat annoying issue that burning
> a cd Disc-At-Once makes the system unusable during the burn. The X
> cursor jerks, repaints take forever, etc. This problem doesn't occur
> when burning Track-At-Once - I'm unable to notice any significant
> increase in system latency when using that mode.
>
This is presumably because the machine is full of memory which
is dirty against a slooow device.
You can work around this by reducing the dirty memory thresholds:
akpm-1:/home/akpm> cat /proc/sys/vm/bdflush
30 64 64 256 30000 3000 60 0 0
Make the "30" and "60" smaller. 10 and 20 perhaps.
Better: change the application to fsync() the data every few
megabytes, or open O_SYNC.
-
next prev parent reply other threads:[~2002-07-31 21:04 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-07-31 20:30 ATAPI CD-R lags system to hell burning in DAO mode; but not in TAO Aaron Lehmann
2002-07-31 21:05 ` Andrew Morton [this message]
2002-07-31 22:59 ` Aaron Lehmann
2002-07-31 21:45 ` DervishD
2002-08-02 13:52 ` Anssi Saari
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