From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-qa0-f45.google.com (mail-qa0-f45.google.com [209.85.216.45]) by kanga.kvack.org (Postfix) with ESMTP id BE0186B006C for ; Mon, 5 Jan 2015 09:53:22 -0500 (EST) Received: by mail-qa0-f45.google.com with SMTP id f12so13470557qad.4 for ; Mon, 05 Jan 2015 06:53:22 -0800 (PST) Received: from resqmta-ch2-09v.sys.comcast.net (resqmta-ch2-09v.sys.comcast.net. [2001:558:fe21:29:69:252:207:41]) by mx.google.com with ESMTPS id s106si60542966qgd.103.2015.01.05.06.53.21 for (version=TLSv1.2 cipher=RC4-SHA bits=128/128); Mon, 05 Jan 2015 06:53:21 -0800 (PST) Date: Mon, 5 Jan 2015 08:53:20 -0600 (CST) From: Christoph Lameter Subject: Re: [PATCH 2/2] mm: don't use compound_head() in virt_to_head_page() In-Reply-To: <1420421765-3209-2-git-send-email-iamjoonsoo.kim@lge.com> Message-ID: References: <1420421765-3209-1-git-send-email-iamjoonsoo.kim@lge.com> <1420421765-3209-2-git-send-email-iamjoonsoo.kim@lge.com> Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org List-ID: To: Joonsoo Kim Cc: Andrew Morton , Pekka Enberg , David Rientjes , linux-mm@kvack.org, linux-kernel@vger.kernel.org, Jesper Dangaard Brouer , rostedt@goodmis.org, Thomas Gleixner On Mon, 5 Jan 2015, Joonsoo Kim wrote: > This patch implements compound_head_fast() which is similar with > compound_head() except tail flag race handling. And then, > virt_to_head_page() uses this optimized function to improve performance. Yeah that is how it was before and how it should be Acked-by: Christoph Lameter -- 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