From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753119AbbCXPYg (ORCPT ); Tue, 24 Mar 2015 11:24:36 -0400 Received: from mail-pa0-f50.google.com ([209.85.220.50]:36303 "EHLO mail-pa0-f50.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752810AbbCXPYb (ORCPT ); Tue, 24 Mar 2015 11:24:31 -0400 From: Sergey Senozhatsky To: Andrew Morton , Minchan Kim Cc: Nitin Gupta , linux-mm@kvack.org, linux-kernel@vger.kernel.org, Sergey Senozhatsky , Sergey Senozhatsky Subject: [PATCH 0/2] zs_object_copy() micro-optimizations Date: Wed, 25 Mar 2015 00:24:45 +0900 Message-Id: <1427210687-6634-1-git-send-email-sergey.senozhatsky@gmail.com> X-Mailer: git-send-email 2.3.4.263.gf53fc38 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, two small patches two micro-optimize zs_object_copy(). The first one removes unneeded kunmap_atomic/kmap_atomic of dst page, when object that we copy belongs to two source pages. The seconds one is also trivial -- removes branching and (a bit) reduses the amount of work done by the function (double offsets calculations). Sergey Senozhatsky (2): zsmalloc: do not remap dst page while prepare next src page zsmalloc: micro-optimize zs_object_copy() mm/zsmalloc.c | 17 +++++++---------- 1 file changed, 7 insertions(+), 10 deletions(-) -- 2.3.4