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SubjectRe: More tests [Was: Problem with read blocking for a long time on /dev/scd1]
FromGreg Stark <>
Date23 Dec 2002 03:58:02 -0500
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Jakob Oestergaard <jakob@unthought.net> writes:
On Sun, Dec 22, 2002 at 11:13:14AM -0500, Greg Stark wrote:

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

Can you reproduce on 2.4.18 or 2.4.19-pre5 ?

AFAIK 2.4.X broke at 2.4.19-pre6 - something was changed that related to the order in which read requests are scheduled.

I originally had the problem with 2.4.18 and only updated to 2.4.20-ac2 hoping it would solve the problem. It doesn't look like the same issue as yours.
When your process is blocked, what wait channel does ps -elf list for it? What system call does strace -T show it executing and for how long?
I wonder what else is on the ide channels, perhaps if I move things around so it's the only device on that channel it would help?
-- 
greg

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