From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <3C62F74F.DE090C2C@mvista.com> Date: Thu, 07 Feb 2002 14:53:19 -0700 From: "Mark A. Greer" MIME-Version: 1.0 To: Val Henson Cc: Benjamin Herrenschmidt , linuxppc-dev@lists.linuxppc.org Subject: Re: Highmem on PPC? References: <20020205115618.D6834@boardwalk> <20020205193316.19866@smtp.wanadoo.fr> <20020207144308.C19569@boardwalk> Content-Type: text/plain; charset=us-ascii Sender: owner-linuxppc-dev@lists.linuxppc.org List-Id: Val Henson wrote: > Also, I don't think this was a particularly good test of highmem since > I don't think many bounce buffers were used, or that the kernel had > much reason to map/unmap many highmem pages. Unfortunately, my SCSI > controller isn't working quite right and I can't test with a hard disk > as a result. Any ideas for stressing the system harder? You could try lowering max_low_mem. You can do this by setting "Code maturity level option"/"Prompt for advanced kernel configuration options" and then going under where you selected HIGH_MEM and setting max_low_mem size to something small. It will likely take some trial and error to get it stressed enough. You'll have to start a bunch or processes and look at where they're getting their memory I'd be interested in hearing how it goes. Mark ** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/