From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753191AbcD1PUT (ORCPT ); Thu, 28 Apr 2016 11:20:19 -0400 Received: from mail-pa0-f42.google.com ([209.85.220.42]:34857 "EHLO mail-pa0-f42.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752675AbcD1PUP (ORCPT ); Thu, 28 Apr 2016 11:20:15 -0400 From: Sergey Senozhatsky To: Minchan Kim Cc: Andrew Morton , linux-kernel@vger.kernel.org, Sergey Senozhatsky , Sergey Senozhatsky Subject: [PATCH 0/2] zram: switch to per-cpu compression streams Date: Fri, 29 Apr 2016 01:17:08 +0900 Message-Id: <1461860230-849-1-git-send-email-sergey.senozhatsky@gmail.com> X-Mailer: git-send-email 2.8.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, The patchset drops idle compression streams list from zcomp, so zram now is using per-cpu compression streams. This removes two spin_lock()/spin_unlock() calls from the write path and prevents write OP from being preempted with active compression stream, which improves performance (according to the tests, see commit messages) and simplifies the code. against next-20160428 Sergey Senozhatsky (2): zsmalloc: require GFP in zs_malloc() zram: user per-cpu compression streams drivers/block/zram/zcomp.c | 293 ++++++++++++------------------------------ drivers/block/zram/zcomp.h | 12 +- drivers/block/zram/zram_drv.c | 34 ++++- include/linux/zsmalloc.h | 2 +- mm/zsmalloc.c | 15 +-- 5 files changed, 119 insertions(+), 237 deletions(-) -- 2.8.0