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=-0.6 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no 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 E666AC3F2D4 for ; Fri, 28 Feb 2020 15:40:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id AFAAD2469D for ; Fri, 28 Feb 2020 15:40:03 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="Q1MbV49L" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727173AbgB1PkA (ORCPT ); Fri, 28 Feb 2020 10:40:00 -0500 Received: from bombadil.infradead.org ([198.137.202.133]:51942 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727073AbgB1PkA (ORCPT ); Fri, 28 Feb 2020 10:40:00 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=In-Reply-To:Content-Type:MIME-Version :References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=RLl4lTWEQ1GAiGFB/dhL9F5BLvw5PQx9CA3ElGeVs+w=; b=Q1MbV49LowiIjlZpl3pNUVex/6 PYMFB6kNE6s0M2yxnhWgQGvqCIe/DlhIOaRLyRdURzf1Wn9ZvewzHhgdjT/tTHbnfX5+HyKMKdxi8 IAwZPdqdVKoQFa+GOs3+zAa99/Z05xaPUZbij2dZIvjv+xW6oDHpR+8w3Jx30mojVKFHz36BcJJxQ 68phLWX6JxxZqC9nm5LoVlVlnfpPqkbHfGjnQN/KtTRnJEhMArnYpn9dzI1EzifcLvwmTvplhu+xM yneLzr2C54T4EFC8UH0bqR8tFQzr2tRs7AMgJnSkRAhVUkkleL0Bsus5cB9fslrLObZAtkPCqBBJR itBk+T3Q==; Received: from willy by bombadil.infradead.org with local (Exim 4.92.3 #3 (Red Hat Linux)) id 1j7hjz-00040e-5g; Fri, 28 Feb 2020 15:39:51 +0000 Date: Fri, 28 Feb 2020 07:39:51 -0800 From: Matthew Wilcox To: Waiman Long Cc: Ian Kent , Andreas Dilger , Alexander Viro , Jonathan Corbet , Luis Chamberlain , Kees Cook , Iurii Zaikin , Linux Kernel Mailing List , Linux FS Devel , linux-doc@vger.kernel.org, Mauro Carvalho Chehab , Eric Biggers , Dave Chinner , Eric Sandeen Subject: Re: [PATCH 00/11] fs/dcache: Limit # of negative dentries Message-ID: <20200228153951.GH29971@bombadil.infradead.org> References: <20200226161404.14136-1-longman@redhat.com> <20200226162954.GC24185@bombadil.infradead.org> <2EDB6FFC-C649-4C80-999B-945678F5CE87@dilger.ca> <9d7b76c32d09492137a253e692624856388693db.camel@themaw.net> <20200228033412.GD29971@bombadil.infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org On Fri, Feb 28, 2020 at 10:32:02AM -0500, Waiman Long wrote: > On 2/27/20 10:34 PM, Matthew Wilcox wrote: > > The canonical argument in favour of negative dentries is to improve > > application startup time as every application searches the library path ^^^^^^^ > > for the same libraries. Only they don't do that any more: ^^^^^^^^^ > > It is the shell that does the path search, not the command itself.