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From: arrowdodger <6yearold@gmail.com>
Date: Wed, 6 Jul 2011 16:35:47 +0400
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To: Andriy Gapon <avg@freebsd.org>
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Cc: FreeBSD Current <freebsd-current@freebsd.org>,
	"O. Hartmann" <ohartman@zedat.fu-berlin.de>
Subject: Re: Heavy I/O blocks FreeBSD box for several seconds
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On Wed, Jul 6, 2011 at 3:37 PM, Andriy Gapon <avg@freebsd.org> wrote:

> Just curious what your current value of sysctl kern.sched.preempt_thresh
> is.
> And if it's not 224 and if you haven't tried 224 yet, then could you please
> try
> it and see if there is any improvement?
>
> This assumes that you use SCHED_ULE (kern.sched.name is "ULE").
>
> --
> Andriy Gapon
>

Whoa, it's definitely better! Thanks a lot. But still, when IO causes system
to use swap, X11 became completely unusable.