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To: Greg Stark <gsstark@MIT.EDU>
Cc: Gregory Stark <gsstark@mit.edu>, linux-kernel@vger.kernel.org
Subject: More tests [Was: Problem with read blocking for a long time on /dev/scd1]
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From: Greg Stark <gsstark@mit.edu>
Organization: The Emacs Conspiracy; member since 1992
Date: 22 Dec 2002 11:13:14 -0500
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I've done some more tests:

The problem still occurs with straight ide drivers, no ide-scsi

The problem still occurs with 2.4.20-ac2

I removed extraneous llseek syscalls from libdvdread, it's now reading purely
sequentially and still failing. I doubt an llseek to the current location even
gets through to the driver but I figured I would remove another variable.

Question: Does the readahead parameter in hdparm affect accesses to the raw
/dev/hdd device? Does it affect atapi cdrom access?

-- 
greg

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