From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1031457AbbEEWZw (ORCPT ); Tue, 5 May 2015 18:25:52 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:34336 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S964917AbbEEWZv (ORCPT ); Tue, 5 May 2015 18:25:51 -0400 Date: Tue, 5 May 2015 15:25:49 -0700 From: Andrew Morton To: Mel Gorman Cc: Waiman Long , Nathan Zimmer , Dave Hansen , Scott Norton , Daniel J Blueman , Linux-MM , LKML Subject: Re: [PATCH 0/13] Parallel struct page initialisation v4 Message-Id: <20150505152549.037679566fad8c593df176ed@linux-foundation.org> In-Reply-To: <20150505221329.GE2462@suse.de> References: <1430231830-7702-1-git-send-email-mgorman@suse.de> <554030D1.8080509@hp.com> <5543F802.9090504@hp.com> <554415B1.2050702@hp.com> <20150504143046.9404c572486caf71bdef0676@linux-foundation.org> <20150505104514.GC2462@suse.de> <20150505130255.49ff76bbf0a3b32d884ab2ce@linux-foundation.org> <20150505221329.GE2462@suse.de> X-Mailer: Sylpheed 3.4.1 (GTK+ 2.24.23; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 5 May 2015 23:13:29 +0100 Mel Gorman wrote: > > Alternatively, the page allocator can go off and synchronously > > initialize some pageframes itself. Keep doing that until the > > allocation attempt succeeds. > > > > That was rejected during review of earlier attempts at this feature on > the grounds that it impacted allocator fast paths. eh? Changes are only needed on the allocation-attempt-failed path, which is slow-path. From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pa0-f42.google.com (mail-pa0-f42.google.com [209.85.220.42]) by kanga.kvack.org (Postfix) with ESMTP id 543BE6B0038 for ; Tue, 5 May 2015 18:25:52 -0400 (EDT) Received: by pacyx8 with SMTP id yx8so207121921pac.1 for ; Tue, 05 May 2015 15:25:52 -0700 (PDT) Received: from mail.linuxfoundation.org (mail.linuxfoundation.org. [140.211.169.12]) by mx.google.com with ESMTPS id d4si26422506pdj.10.2015.05.05.15.25.50 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 05 May 2015 15:25:51 -0700 (PDT) Date: Tue, 5 May 2015 15:25:49 -0700 From: Andrew Morton Subject: Re: [PATCH 0/13] Parallel struct page initialisation v4 Message-Id: <20150505152549.037679566fad8c593df176ed@linux-foundation.org> In-Reply-To: <20150505221329.GE2462@suse.de> References: <1430231830-7702-1-git-send-email-mgorman@suse.de> <554030D1.8080509@hp.com> <5543F802.9090504@hp.com> <554415B1.2050702@hp.com> <20150504143046.9404c572486caf71bdef0676@linux-foundation.org> <20150505104514.GC2462@suse.de> <20150505130255.49ff76bbf0a3b32d884ab2ce@linux-foundation.org> <20150505221329.GE2462@suse.de> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Mel Gorman Cc: Waiman Long , Nathan Zimmer , Dave Hansen , Scott Norton , Daniel J Blueman , Linux-MM , LKML On Tue, 5 May 2015 23:13:29 +0100 Mel Gorman wrote: > > Alternatively, the page allocator can go off and synchronously > > initialize some pageframes itself. Keep doing that until the > > allocation attempt succeeds. > > > > That was rejected during review of earlier attempts at this feature on > the grounds that it impacted allocator fast paths. eh? Changes are only needed on the allocation-attempt-failed path, which is slow-path. -- 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