Subject: Re: jerky interactive behavior
To: Perry E. Metzger <>
From: Steven M. Bellovin <>
List: current-users
Date: 01/21/2007 17:02:43
On Sun, 21 Jan 2007 16:48:15 -0500
"Perry E. Metzger" <> wrote:

> "Steven M. Bellovin" <> writes:
> >> As of Jan, something seems to have broken BUFQ_READPRIO -- unclear
> >> who did it or why, but it is very clear to me that it got broken.
> >> The old symptoms of lots of disk i/o locking out userland
> >> processes trying to read something have returned.
> >> 
> > I do indeed have BUFQ_READPRIO defined, but I'm far from convinced
> > that that's the problem -- this is happening without any
> > disk-intensive activity going on in the background.  Sure, there's
> > always something some daemon is doing, but I've tried shutting down
> > other things.
> I've been looking very carefully at my disk light when the hangs
> happen, and there is usually disk i/o in progress when the hangs
> occur. Are you sure your disk light on your T41 isn't going off at the
> same time at all?
Certain?  No.  But I've been watching it, too. 

		--Steve Bellovin,