From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753278AbaKHXBv (ORCPT ); Sat, 8 Nov 2014 18:01:51 -0500 Received: from mail-wi0-f179.google.com ([209.85.212.179]:60760 "EHLO mail-wi0-f179.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751231AbaKHXBu (ORCPT ); Sat, 8 Nov 2014 18:01:50 -0500 From: Timofey Titovets To: linux-mm@kvack.org, linux-kernel@vger.kernel.org Cc: nefelim4ag@gmail.com, marco.antonio.780@gmail.com Subject: [PATCH v2 0/3] KSM: Mark new vma for deduplication Date: Sun, 9 Nov 2014 02:01:40 +0300 Message-Id: <1415487703-1824-1-git-send-email-nefelim4ag@gmail.com> X-Mailer: git-send-email 2.1.3 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Good time of day List, this tiny series of patches implement feature for auto deduping all anonymous memory. mark_new_vma - new ksm sysfs interface Every time then new vma created and mark_new_vma set to 1, then will be vma marked as VM_MERGEABLE and added to ksm queue. This can produce small overheads (I have not catch any problems or slowdown) This is useful for: Android (CM) devs which implement ksm support with patching system. Users of tiny pc. Servers what not use KVM but use something very releated, like containers. For tests: I have tested it and it working very good. For testing apply it and enable ksm: echo 1 | sudo tee /sys/kernel/mm/ksm/run This show how much memory saved: echo $[$(cat /sys/kernel/mm/ksm/pages_shared)*$(getconf PAGE_SIZE)/1024 ]KB On my system i save ~1% of memory 26 Mb/2100 Mb (deduped)/(used) Timofey Titovets (3): KSM: Add auto flag new VMA as VM_MERGEABLE KSM: Add to sysfs - mark_new_vma KSM: Add config to control mark_new_vma include/linux/ksm.h | 39 +++++++++++++++++++++++++++++++++++++++ mm/Kconfig | 7 +++++++ mm/ksm.c | 39 ++++++++++++++++++++++++++++++++++++++- mm/mmap.c | 17 +++++++++++++++++ 4 files changed, 101 insertions(+), 1 deletion(-) -- 2.1.3