Xorg 6.8.1 and SCHED_ULE vs. SCHED_4BSD

Kevin Oberman oberman at es.net
Tue Mar 1 20:21:08 GMT 2005

> Date: Tue, 1 Mar 2005 15:24:58 +0100
> From: Godwin Stewart <gstewart at bonivet.net>
> Sender: owner-freebsd-stable at freebsd.org
> On Mon, 28 Feb 2005 16:21:39 -0800, "Kevin Oberman" <oberman at es.net> wrote:
> > I'd say something is very wrong on your systems and I'd ALMOST bet it's
> > ata related. Maybe ATA-MkIII would help things out.
> Possibly, altho' I doubt it given that the only short periods during which
> the machine is responsive are *during* disk I/O.

Please DON'T top post to any FreeBSD list!

This is starting to sound like it might be an interrupt routing issue
and interrupts from the disk are sharing an IRQ with something
else. "Something else" is generating interrupts that are never getting
delivered, but the disk interrupts are waking the appropriate driver to
allow things to proceed.
R. Kevin Oberman, Network Engineer
Energy Sciences Network (ESnet)
Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab)
E-mail: oberman at es.net			Phone: +1 510 486-8634

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