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From: Cort Dougan <cort@fsmlabs.com>
To: Michel Lanners <mlan@cpu.lu>
Cc: paulus@linuxcare.com.au, linuxppc-dev@lists.linuxppc.org
Subject: Re: zeroing pages in the idle task?
Date: Wed, 13 Sep 2000 22:21:21 -0600	[thread overview]
Message-ID: <20000913222121.K4546@hq.fsmlabs.com> (raw)
In-Reply-To: <200009131951.VAA00816@piglet.grunz.lu>; from Michel Lanners on Wed, Sep 13, 2000 at 09:51:25PM +0200


I missed a lot of this thread, this is the first message I picked up on.

} To come back to my original question...

It's a dead loss on SMP, but it can be just run on UP machines.  The main
problem was I didn't have enough time to finish it and didn't want to leave
something running in the idle task that I hadn't finished studying the
effect of.

I really wanted to push it up to the freelist since I don't think it's a
PPC-only optimization.  I never bothered trying to push it since at that
point the tree was moving to the stable point and wasn't going to be
changing that radically soon.

} > - is there any problem with using this feature?
}
} I didn't have any, but that's only my box then....

Not without a lot of study and testing.  I haven't touched the code in a
long time...

} What do you think, Paul, Cort?

It's not a matter of turning it on - it's a matter of making it work again
and testing it.

} Maybe enabling it by default would be a good choice? It can always be
} disabled...
}
} I'll post a patch on sourceforge.

** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/

  reply	other threads:[~2000-09-14  4:21 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2000-09-12 20:18 zeroing pages in the idle task? Michel Lanners
2000-09-13  3:46 ` Paul Mackerras
2000-09-13  6:08   ` Michel Lanners
2000-09-13 10:45     ` Benjamin Herrenschmidt
2000-09-13  7:13   ` Takashi Oe
2000-09-13 16:23     ` David A. Gatwood
2000-09-13 19:32       ` Geert Uytterhoeven
2000-09-15  2:28         ` ld bug? Takashi Oe
2000-09-15  3:00           ` Kaoru Fukui
2000-09-15  3:16           ` Paul Mackerras
2000-09-15  3:44             ` Takashi Oe
2000-09-15  2:35         ` zeroing pages in the idle task? Takashi Oe
2000-09-15  4:50           ` Timothy A. Seufert
2000-09-15 13:50             ` Holger Bettag
2000-09-15 15:29               ` Michael Schmitz
2000-09-15 15:30                 ` Takashi Oe
2000-09-15 10:49           ` Geert Uytterhoeven
2000-09-26 10:18   ` Gabriel Paubert
2000-09-13 19:51 ` Michel Lanners
2000-09-14  4:21   ` Cort Dougan [this message]
2000-09-14  4:44   ` Paul Mackerras
2000-09-18 14:26     ` Adrian Cox
2000-09-18 14:41       ` Benjamin Herrenschmidt
2000-09-18 14:58         ` Adrian Cox
2000-09-18 17:56           ` Matt Porter
2000-09-26 10:38     ` Gabriel Paubert
2000-09-27  5:24       ` Paul Mackerras

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