From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Donny Cooper" Date: Thu, 06 Sep 2001 16:22:54 +0000 Subject: [Linux-ia64] IA64 Linux Kernel Page Sizes Message-Id: List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-ia64@vger.kernel.org (1) Below is a previous mail, from David M., responding to page size questions for IA64 kernels. > As for the future: I'd like to start playing with superpage support > fairly soon (once I get some spare time on my hands... ;-). With > superpages, physically contiguous regions of memory could be mapped > with a single TLB entry, giving you most of the benefit of (very) > large page sizes. --david Are there any updates on these plans? (2) Below are current available kernel options (from config). 4KB For best IA-32 compatibility 8KB For best IA-64 performance 16KB For best IA-64 performance 64KB Not for Itanium. What is "IA64 best performance" based on? We have a large memory system (32GB), and are not concerned with wasting memory during certain benchmarks. Are 64KB pages truly not functional on Itanium, or just not recommended because of memory waste. To my knowledge, HP-UX seems to benefit from 64KB pages on ITANIUM. Any input or recommendation on these items is appreciated. Thanks. ----------------------------------- Donny Cooper NEC Systems, Inc. Advanced Technical Computing Center dcooper@atcc.necsys.com www.necservers.com -----------------------------------