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Date: Tue, 22 Jul 2008 17:14:41 -0400 From: Rik van Riel <riel@...hat.com> To: Justin Piszcz <jpiszcz@...idpixels.com> Cc: linux-kernel@...r.kernel.org, Alan Piszcz <ap@...arrain.com> Subject: Re: 128 GiB memory question-- kernel only sees 64GiB? On Tue, 22 Jul 2008 16:55:32 -0400 (EDT) Justin Piszcz <jpiszcz@...idpixels.com> wrote: > On Tue, 22 Jul 2008, Rik van Riel wrote: > > > On Tue, 22 Jul 2008 10:21:44 -0400 (EDT) > > Justin Piszcz <jpiszcz@...idpixels.com> wrote: > > > >> To be able to utilize 128 GiB of memory on a host, does one need to enable > >> NUMA support? Currently only 64 GiB is showing up. > > > > How much memory does the BIOS say the system has? > Asked them. > > > > > Can you get the e820 memory map (from early boot up) of the systems? > Probably can't get this. It looks roughly like this: BIOS-provided physical RAM map: BIOS-e820: 0000000000000000 - 00000000000a0000 (usable) BIOS-e820: 0000000000100000 - 00000000bfb50000 (usable) BIOS-e820: 00000000bfb50000 - 00000000bfb66000 (reserved) BIOS-e820: 00000000bfb66000 - 00000000bfb85c00 (ACPI data) BIOS-e820: 00000000bfb85c00 - 00000000c0000000 (reserved) BIOS-e820: 00000000e0000000 - 00000000f0000000 (reserved) BIOS-e820: 00000000fe000000 - 0000000100000000 (reserved) BIOS-e820: 0000000100000000 - 0000000440000000 (usable) Getting this info will be very useful. -- All rights reversed. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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