From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from wpaz29.hot.corp.google.com (wpaz29.hot.corp.google.com [172.24.198.93]) by smtp-out.google.com with ESMTP id m8ILLMp6001152 for ; Thu, 18 Sep 2008 22:21:22 +0100 Received: from wf-out-1314.google.com (wfc25.prod.google.com [10.142.3.25]) by wpaz29.hot.corp.google.com with ESMTP id m8ILKAaP017713 for ; Thu, 18 Sep 2008 14:21:21 -0700 Received: by wf-out-1314.google.com with SMTP id 25so136408wfc.12 for ; Thu, 18 Sep 2008 14:21:21 -0700 (PDT) Message-ID: <33307c790809181421k52ed6a36h9d4ee40d5799a536@mail.gmail.com> Date: Thu, 18 Sep 2008 14:21:21 -0700 From: "Martin Bligh" Subject: Re: Populating multiple ptes at fault time In-Reply-To: <48D2C46A.5030702@linux-foundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <48D142B2.3040607@goop.org> <48D1625C.7000309@redhat.com> <48D17A93.4000803@goop.org> <48D29AFB.5070409@linux-foundation.org> <48D2A392.6010308@goop.org> <33307c790809181352h14f2cf26kc73de75b939177b5@mail.gmail.com> <48D2BFB8.6010503@redhat.com> <33307c790809181411j41a6fc4ev8560a13ed8661ec2@mail.gmail.com> <48D2C46A.5030702@linux-foundation.org> Sender: owner-linux-mm@kvack.org Return-Path: To: Christoph Lameter Cc: Chris Snook , Jeremy Fitzhardinge , Nick Piggin , Hugh Dickens , Linux Memory Management List , Linux Kernel Mailing List , Avi Kivity , Andrew Morton , Rik van Riel List-ID: >>>> Yup, basically you're assuming good locality of reference, but it turns >>>> out that (as davej would say) "userspace sucks". >>> Well, *most* userspace sucks. It might still be worthwhile to do this when >>> userspace is using madvise(). >> >> Quite possibly true ... something to benchmark. > > Well, I guess we need a new binary format that allows one to execute binaries > in kernel address space with full powers. Seems ... extreme ;-) Maybe we just do it if we're in readahead? (or similar) -- 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