From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754158AbbAGRH1 (ORCPT ); Wed, 7 Jan 2015 12:07:27 -0500 Received: from mail-we0-f181.google.com ([74.125.82.181]:41963 "EHLO mail-we0-f181.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753713AbbAGRHY (ORCPT ); Wed, 7 Jan 2015 12:07:24 -0500 From: Petr Cermak To: linux-kernel@vger.kernel.org Cc: linux-mm@kvack.org, Andrew Morton , Bjorn Helgaas , Primiano Tucci , Petr Cermak Subject: [PATCH v2 0/2] task_mmu: Add user-space support for resetting mm->hiwater_rss (peak RSS) Date: Wed, 7 Jan 2015 17:06:52 +0000 Message-Id: X-Mailer: git-send-email 2.2.0.rc0.207.ga3a616c Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Being able to reset mm->hiwater_rss (resident set size high water mark) from user space would enable fine grained iterative memory profiling. I propose a very short patch for doing so. The driving use-case for this would be getting the peak RSS value, which can be retrieved from the VmHWM field in /proc/pid/status, per benchmark iteration or test scenario. Changelog: v2: - clarify behaviour in documentation as suggesed by Andrew Morton - fix a declaration-after-statement warning in fs/proc/task_mmu.c v1: https://lkml.org/lkml/2014/12/10/312 Petr Cermak (2): task_mmu: Reduce excessive indentation in clear_refs_write task_mmu: Add user-space support for resetting mm->hiwater_rss (peak RSS) Documentation/filesystems/proc.txt | 3 + fs/proc/task_mmu.c | 115 +++++++++++++++++++++---------------- include/linux/mm.h | 5 ++ 3 files changed, 74 insertions(+), 49 deletions(-) -- 2.2.0.rc0.207.ga3a616c