From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christoph Hellwig Date: Fri, 29 Apr 2005 21:02:40 +0000 Subject: Re: [PATCH 3/3] Page Fault Scalability V20: Avoid lock for anonymous write fault Message-Id: <20050429210240.GA14774@infradead.org> List-Id: References: <20050429195901.15694.28520.sendpatchset@schroedinger.engr.sgi.com> <20050429195917.15694.21053.sendpatchset@schroedinger.engr.sgi.com> In-Reply-To: <20050429195917.15694.21053.sendpatchset@schroedinger.engr.sgi.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Christoph Lameter Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-ia64@vger.kernel.org On Fri, Apr 29, 2005 at 12:59:17PM -0700, Christoph Lameter wrote: > Do not use the page_table_lock in do_anonymous_page. This will significantly > increase the parallelism in the page fault handler for SMP systems. The patch > also modifies the definitions of _mm_counter functions so that rss and anon_rss > become atomic (and will use atomic64_t if available). I thought we said all architectures should provide an atomic64_t (and given that it's not actually 64bit on 32bit architecture we should probably rename it to atomic_long_t)