From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_SANE_1 autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4F98BC2D0FB for ; Wed, 13 May 2020 01:53:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 39B8720714 for ; Wed, 13 May 2020 01:53:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730021AbgEMBxG (ORCPT ); Tue, 12 May 2020 21:53:06 -0400 Received: from mail109.syd.optusnet.com.au ([211.29.132.80]:51251 "EHLO mail109.syd.optusnet.com.au" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726028AbgEMBxG (ORCPT ); Tue, 12 May 2020 21:53:06 -0400 X-Greylist: delayed 1209 seconds by postgrey-1.27 at vger.kernel.org; Tue, 12 May 2020 21:53:04 EDT Received: from dread.disaster.area (pa49-195-157-175.pa.nsw.optusnet.com.au [49.195.157.175]) by mail109.syd.optusnet.com.au (Postfix) with ESMTPS id 79961D79337; Wed, 13 May 2020 11:52:59 +1000 (AEST) Received: from dave by dread.disaster.area with local (Exim 4.92.3) (envelope-from ) id 1jYgZs-0001dG-SQ; Wed, 13 May 2020 11:52:56 +1000 Date: Wed, 13 May 2020 11:52:56 +1000 From: Dave Chinner To: Konstantin Khlebnikov Cc: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, Alexander Viro , Waiman Long Subject: Re: [PATCH RFC 2/8] selftests: add stress testing tool for dcache Message-ID: <20200513015256.GN2005@dread.disaster.area> References: <158893941613.200862.4094521350329937435.stgit@buzz> <158894059714.200862.11121403612367981747.stgit@buzz> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <158894059714.200862.11121403612367981747.stgit@buzz> User-Agent: Mutt/1.10.1 (2018-07-13) X-Optus-CM-Score: 0 X-Optus-CM-Analysis: v=2.3 cv=X6os11be c=1 sm=1 tr=0 a=ONQRW0k9raierNYdzxQi9Q==:117 a=ONQRW0k9raierNYdzxQi9Q==:17 a=kj9zAlcOel0A:10 a=sTwFKg_x9MkA:10 a=6R7veym_AAAA:8 a=7-415B0cAAAA:8 a=nNFfUkKyeu1yzWEg-EsA:9 a=CjuIK1q_8ugA:10 a=ILCOIF4F_8SzUMnO7jNM:22 a=biEYGPWJfzWAr4FL6Ov7:22 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, May 08, 2020 at 03:23:17PM +0300, Konstantin Khlebnikov wrote: > This tool fills dcache with negative dentries. Between iterations it prints > statistics and measures time of inotify operation which might degrade. > > Signed-off-by: Konstantin Khlebnikov > --- > tools/testing/selftests/filesystems/Makefile | 1 > .../testing/selftests/filesystems/dcache_stress.c | 210 ++++++++++++++++++++ This sort of thing should go into fstests along with test scripts that use it to exercise the dentry cache. We already have tools like this in fstests (dirstress, metaperf, etc) for exercising name-based operations like this, so it would fit right in. That way it would get run by just about every filesystem developer and distro QE department automatically and extremely frequently... Cheers, Dave. -- Dave Chinner david@fromorbit.com