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 7E63BC2D0F6 for ; Wed, 13 May 2020 02:12:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5A9182176D for ; Wed, 13 May 2020 02:12:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728228AbgEMCMA (ORCPT ); Tue, 12 May 2020 22:12:00 -0400 Received: from mail109.syd.optusnet.com.au ([211.29.132.80]:59461 "EHLO mail109.syd.optusnet.com.au" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727792AbgEMCMA (ORCPT ); Tue, 12 May 2020 22:12:00 -0400 X-Greylist: delayed 1135 seconds by postgrey-1.27 at vger.kernel.org; Tue, 12 May 2020 22:11:59 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-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@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