Subject: st driver somehow blocking interrupts *way* too long.
To: None <firstname.lastname@example.org>
From: Thor Lancelot Simon <email@example.com>
Date: 05/24/2003 15:56:19
About a year ago I noticed that when backing up to DLT my main
fileserver's clock seemed to slip severely. I assumed it was a
problem in the adw or isp drivers, hunted for it a bit, and
really found pretty much nothing. I stopped using the fileserver
as an NTP server and didn't think much of it.
Now I'm sitting at home with a cheezy 5MB/sec SCSI DLT 2500 on
an ancient bha host adapter, trying to restore a tape of some
music files. I'm noticing not only time slip but a steady stream
of "ohci0: one scheduling overruns".
I don't see anywhere obvious in the st or mid-layer code that
would block interrupts for a Long Time, but now I'm convinced
there must be some such problem. Does anyone else see an
obvious suspect here?
Thor Lancelot Simon firstname.lastname@example.org
But as he knew no bad language, he had called him all the names of common
objects that he could think of, and had screamed: "You lamp! You towel! You
plate!" and so on. --Sigmund Freud