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Date: Wed, 23 Nov 2005 19:40:50 -0500
From: Kris Kennaway <kris@obsecurity.org>
To: David Xu <davidxu@freebsd.org>
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Cc: current@FreeBSD.org, Kris Kennaway <kris@obsecurity.org>
Subject: Re: 4BSD process starvation during I/O
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On Thu, Nov 24, 2005 at 08:35:03AM +0800, David Xu wrote:
> Kris Kennaway wrote:
>=20
> >On Thu, Nov 24, 2005 at 07:52:30AM +0800, David Xu wrote:
> >=20
> >
> >>Kris Kennaway wrote:
> >>
> >>  =20
> >>
> >>>Perhaps this can be tweaked.
> >>>
> >>>Kris
> >>>
> >>>P.S. Please, no responses about how maybe someone could write a new
> >>>scheduler that doesn't have this property.
> >>>
> >>>
> >>>
> >>>
> >>>    =20
> >>>
> >>Can you try it again with FULL_PREEMPTION is turned on ?
> >>  =20
> >>
> >
> >Didn't really make a difference:
> >
> >=20
> >
> This might only can be fixed when msleep no longer explicitly fiddles
> thread priority, let scheduler fully control it.

OK, thanks for looking at it.

Kris

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