From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Tue, 1 May 2007 02:04:41 -0700 From: Andrew Morton Subject: Re: cache-pipe-buf-page-address-for-non-highmem-arch.patch Message-Id: <20070501020441.10b6a003.akpm@linux-foundation.org> In-Reply-To: <20070501085431.GD14364@infradead.org> References: <20070430162007.ad46e153.akpm@linux-foundation.org> <20070501085431.GD14364@infradead.org> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: Christoph Hellwig Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, kenchen@google.com, Andi Kleen List-ID: On Tue, 1 May 2007 09:54:31 +0100 Christoph Hellwig wrote: > > cache-pipe-buf-page-address-for-non-highmem-arch.patch > > I still don't like this one at all. If page_address on x86_64 is too > slow we should fix the root cause. Fair enough, it is a bit of an ugly thing. And I see no measurements there on what the overall speedup was for any workload. Ken, which memory model was in use? sparsemem? Andi, what are the prospects of speeding any of that up? -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org