Subject: Re: st driver somehow blocking interrupts *way* too long.
To: Thor Lancelot Simon <email@example.com>
From: Matthew Jacob <firstname.lastname@example.org>
Date: 05/26/2003 21:26:26
What's the underlying SCSI hba?
On Sat, 24 May 2003, Thor Lancelot Simon wrote:
> 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 email@example.com
> 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