From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751369AbdEBOpl (ORCPT ); Tue, 2 May 2017 10:45:41 -0400 Received: from mail-pg0-f65.google.com ([74.125.83.65]:36590 "EHLO mail-pg0-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750989AbdEBOpj (ORCPT ); Tue, 2 May 2017 10:45:39 -0400 From: Wei Yang To: cl@linux.com, penberg@kernel.org, rientjes@google.com, iamjoonsoo.kim@lge.com, akpm@linux-foundation.org, willy@infradead.org Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, Wei Yang Subject: [PATCH V2 0/3] try to save some memory for kmem_cache in some cases Date: Tue, 2 May 2017 22:45:30 +0800 Message-Id: <20170502144533.10729-1-richard.weiyang@gmail.com> X-Mailer: git-send-email 2.11.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org kmem_cache is a frequently used data in kernel. During the code reading, I found maybe we could save some space in some cases. 1. On 64bit arch, type int will occupy a word if it doesn't sit well. 2. cpu_slab->partial is just used when CONFIG_SLUB_CPU_PARTIAL is set 3. cpu_partial is just used when CONFIG_SLUB_CPU_PARTIAL is set, while just save some space on 32bit arch. v2: define some macro to make the code more elegant Wei Yang (3): mm/slub: pack red_left_pad with another int to save a word mm/slub: wrap cpu_slab->partial in CONFIG_SLUB_CPU_PARTIAL mm/slub: wrap kmem_cache->cpu_partial in config CONFIG_SLUB_CPU_PARTIAL include/linux/slub_def.h | 34 ++++++++++++++++++- mm/slub.c | 85 ++++++++++++++++++++++++++---------------------- 2 files changed, 80 insertions(+), 39 deletions(-) -- 2.11.0