From: Benjamin Herrenschmidt <bh40@calva.net>
To: Adrian Cox <apc@agelectronics.co.uk>, <linuxppc-dev@lists.linuxppc.org>
Subject: Re: zeroing pages in the idle task?
Date: Mon, 18 Sep 2000 16:41:49 +0200 [thread overview]
Message-ID: <20000918144149.27565@mailhost.mipsys.com> (raw)
In-Reply-To: <39C6262B.A54933C2@agelectronics.co.uk>
>> It would be cleaner to have the page mapped with a non-cacheable
>> mapping while the idle task is clearing it but you still have to be
>> careful about cache inconsistencies, particularly if the page is
>> mapped twice and one mapping is cacheable and the other isn't.
>
>It might be interesting to try using a DMA engine on MPC 106/107 systems
>to clear pages in the background. I've seen some simulations which
>suggest that this could be a big win, but I'd have to spend a while
>digging through the IEEE archives to find them again.
I didn't find any mention of a DMA engine in the MPC106... Or did I miss
something ?
Ben.
** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/
next prev parent reply other threads:[~2000-09-18 14:41 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
2000-09-14 4:44 ` Paul Mackerras
2000-09-18 14:26 ` Adrian Cox
2000-09-18 14:41 ` Benjamin Herrenschmidt [this message]
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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