From: Victor Yodaiken <yodaiken@fsmlabs.com>
To: Linus Torvalds <torvalds@transmeta.com>
Cc: Victor Yodaiken <yodaiken@fsmlabs.com>,
Rik van Riel <riel@conectiva.com.br>,
Andrea Arcangeli <andrea@suse.de>,
Benjamin LaHaise <bcrl@redhat.com>,
"David S. Miller" <davem@redhat.com>,
linux-kernel@vger.kernel.org
Subject: Re: please revert bogus patch to vmscan.c
Date: Tue, 30 Oct 2001 10:51:02 -0700 [thread overview]
Message-ID: <20011030105102.A10928@hq2> (raw)
In-Reply-To: <Pine.LNX.4.33.0110300903320.8603-100000@penguin.transmeta.com>
On Tue, Oct 30, 2001 at 09:17:31AM -0800, Linus Torvalds wrote:
> I still have the occasional nightmares about the IBM block diagrams
> "explaining" the PowerPC MMU in their technical documentation.
>
> There's probably a perfectly valid explanation for them, though (*).
>
> Linus
>
> (*) Probably along the lines of the designers being so high on LSD that
> they thought it was a really cool idea. That would certainly explain it in
> a very logical fashion.
All the studies I saw were back from the days when
cache-speed/expensive-memory-speed was close to 1. In this case, the
effect of randomizing memory fetches is no big deal. The rest
of standard PPC mmu architecture is pretty nice, but, if the Alpha
architects could decide to use the PC cmos clock as their only
prgrammable timer, and the Itanium guys could decide to put in a single
shift-mask path, why shouldn't the IBM designers get to destroy cache
by wasting a bunch of CPU area logic?
next prev parent reply other threads:[~2001-10-30 17:56 UTC|newest]
Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-10-29 23:08 please revert bogus patch to vmscan.c Benjamin LaHaise
2001-10-29 23:14 ` David S. Miller
2001-10-29 23:15 ` Benjamin LaHaise
2001-10-29 23:25 ` Linus Torvalds
2001-10-29 23:33 ` Benjamin LaHaise
2001-10-29 23:36 ` David S. Miller
2001-10-29 23:39 ` Benjamin LaHaise
2001-10-29 23:41 ` Linus Torvalds
2001-10-29 23:48 ` Benjamin LaHaise
2001-10-29 23:50 ` David S. Miller
2001-10-29 23:51 ` Benjamin LaHaise
2001-10-29 23:55 ` David S. Miller
2001-10-29 23:57 ` Benjamin LaHaise
2001-10-30 0:01 ` David S. Miller
2001-10-30 0:05 ` Benjamin LaHaise
2001-10-29 23:58 ` Linus Torvalds
2001-10-30 1:31 ` Rik van Riel
2001-10-30 1:34 ` David S. Miller
2001-10-30 1:42 ` Linus Torvalds
2001-10-30 1:46 ` David S. Miller
2001-10-30 2:25 ` Benjamin LaHaise
2001-10-30 15:20 ` Andrea Arcangeli
2001-10-30 15:34 ` Rik van Riel
2001-10-30 15:51 ` Andrea Arcangeli
2001-10-30 16:34 ` Benjamin LaHaise
2001-10-30 17:00 ` Andrea Arcangeli
2001-10-30 17:07 ` Rik van Riel
2001-10-30 16:13 ` Giuliano Pochini
2001-10-30 16:54 ` Andrea Arcangeli
2001-10-30 17:23 ` Giuliano Pochini
2001-10-30 17:30 ` Andrea Arcangeli
2001-10-31 0:38 ` Paul Mackerras
[not found] ` <15327.8495.767553.389519@cargo.ozlabs.ibm.com>
2001-10-31 1:57 ` Andrea Arcangeli
2001-10-30 16:38 ` Linus Torvalds
2001-10-30 16:47 ` Benjamin LaHaise
2001-10-30 16:57 ` Victor Yodaiken
2001-10-30 17:16 ` Troy Benjegerdes
2001-10-30 17:17 ` Linus Torvalds
2001-10-30 17:51 ` Victor Yodaiken [this message]
2001-10-30 18:01 ` Cort Dougan
2001-10-30 21:39 ` Paul Mackerras
2001-10-30 22:36 ` Victor Yodaiken
2001-10-30 17:23 ` Benjamin Herrenschmidt
2001-10-30 17:36 ` Benjamin Herrenschmidt
2001-10-30 17:41 ` Linus Torvalds
2001-10-30 1:49 ` Benjamin LaHaise
2001-10-30 9:03 ` Alan Cox
2001-10-29 23:22 ` Linus Torvalds
2001-10-29 23:29 ` Benjamin LaHaise
2001-10-29 23:44 ` Linus Torvalds
2001-10-30 0:02 ` Hugh Dickins
2001-10-30 0:04 ` Linus Torvalds
2001-10-30 0:04 ` David S. Miller
2001-10-29 23:51 ` Paul Mackerras
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