From mboxrd@z Thu Jan 1 00:00:00 1970 From: Bjorn Helgaas Date: Tue, 08 Jun 2004 15:05:52 +0000 Subject: Re: Who owns those locks ? Message-Id: <200406080905.52673.bjorn.helgaas@hp.com> List-Id: References: <40A1F4BE.4A298352@nospam.org> <200406070906.54132.bjorn.helgaas@hp.com> <40C572C8.20B13640@nospam.org> In-Reply-To: <40C572C8.20B13640@nospam.org> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Zoltan.Menyhart@bull.net Cc: linux-ia64@vger.kernel.org, linux-kernel@vger.kernel.org On Tuesday 08 June 2004 2:03 am, Zoltan Menyhart wrote: > - You keep my code, it is correct for a memory size up to 16 Tbytes. Many if not most large machines have sparse address spaces, so you may have memory at an address that will cause a problem even if the actual amount of memory is much smaller. The main point is that I wouldn't want a time bomb that will silently fail when somebody happens to boot on such a machine. Whether that's avoided by a "miraculous" bit, throwing away problem pages at boot-time, avoiding task allocation at specific addresses, etc., is secondary.