Date: Thu, 11 Jul 2002 16:31:50 -0700 From: Peter Wemm <peter@wemm.org> To: John Baldwin <jhb@FreeBSD.org>, Matthew Dillon <dillon@apollo.backplane.com>, Julian Elischer <julian@elischer.org>, freebsd-current@FreeBSD.ORG, Alfred Perlstein <bright@mu.org> Subject: Re: Proposed fix for SMP vm_zeroidle.c Message-ID: <20020711233150.8732A3808@overcee.wemm.org> In-Reply-To: <20020711232614.CEDDD38CC@overcee.wemm.org>
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Peter Wemm wrote:
> John Baldwin wrote:
> >
> > On 11-Jul-2002 Matthew Dillon wrote:
> > > Here is my proposed fix for the page-zeroing problem w/ SMP. It
> > > is untested (I'm about to test it)... I'm looking for comments on
> > > the concept. If the comments are positive and my testing succeeds I
> > > will commit it tonight.
> > >
> > > Basically the idea is simple. Provide a function that mi_switch() ca
n
> > > call when switching in a thread. The page zeroing code sets this
> > > function to cpu_invlpg(CADDR3) on switch-in, thus dealing with any
> > > potential switch between cpu's with virtually no overhead (no overhea
d
> > > that we care about anyway).
> > >
> > > I daresay that this mechanism could be used for a number of other
> > > purposes as well.
> > >
> > > What do you think?
> >
> > Sounds fine to me. I'm not sure it will be all that useful for other
> > things in the future but it conveniently solves the problem at hand
> > at least.
>
> ARRGH!! NOOOO!!!
To clarify, please hold fire for a day or so please. Let me finish
validating what I'm working on now (I've been testing for three days).
Cheers,
-Peter
--
Peter Wemm - peter@wemm.org; peter@FreeBSD.org; peter@yahoo-inc.com
"All of this is for nothing if we don't go to the stars" - JMS/B5
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