From mboxrd@z Thu Jan 1 00:00:00 1970 From: Benjamin Herrenschmidt To: Adrian Cox , Subject: Re: zeroing pages in the idle task? Date: Mon, 18 Sep 2000 16:41:49 +0200 Message-Id: <20000918144149.27565@mailhost.mipsys.com> In-Reply-To: <39C6262B.A54933C2@agelectronics.co.uk> References: <39C6262B.A54933C2@agelectronics.co.uk> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Sender: owner-linuxppc-dev@lists.linuxppc.org List-Id: >> 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/