From mboxrd@z Thu Jan 1 00:00:00 1970 From: William Lee Irwin III Date: Tue, 15 Feb 2005 20:15:19 +0000 Subject: Re: [PATCH] Convert pgtable cache to slab Message-Id: <20050215201519.GA13009@holomorphy.com> List-Id: References: In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-ia64@vger.kernel.org On Tue, 15 Feb 2005 13:31:48 -0600, Robin Holt said: Robin> Is there a strong objection to implementing 4 levels of 16k Robin> page tables for now and then, if someone else sees a need, Robin> convert to using long page table format and adjust page Robin> tables as needed at that point in time. On Tue, Feb 15, 2005 at 11:46:21AM -0800, David Mosberger wrote: > I certainly don't want to switch my machines to 4-levels. There is > zero need for that on the machines I use, so why pay the overhead of > an extra level? > BTW: why do you want 4-level/16KB over 3-level/64KB? It may be worth noticing that things like fault latency and small writes degrade with increased pagesize, though I seem to recall hearing that this effect was less pronounced or did not set in at 64KB on ia64. -- wli