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=-2.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 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 5F418C432C3 for ; Fri, 15 Nov 2019 22:11:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3B200206E1 for ; Fri, 15 Nov 2019 22:11:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726992AbfKOWK7 (ORCPT ); Fri, 15 Nov 2019 17:10:59 -0500 Received: from zeniv.linux.org.uk ([195.92.253.2]:41290 "EHLO ZenIV.linux.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726661AbfKOWK6 (ORCPT ); Fri, 15 Nov 2019 17:10:58 -0500 Received: from viro by ZenIV.linux.org.uk with local (Exim 4.92.3 #3 (Red Hat Linux)) id 1iVjnZ-0008GP-F9; Fri, 15 Nov 2019 22:10:37 +0000 Date: Fri, 15 Nov 2019 22:10:37 +0000 From: Al Viro To: Steven Rostedt Cc: Greg KH , yu kuai , rafael@kernel.org, oleg@redhat.com, mchehab+samsung@kernel.org, corbet@lwn.net, tytso@mit.edu, jmorris@namei.org, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, zhengbin13@huawei.com, yi.zhang@huawei.com, chenxiang66@hisilicon.com, xiexiuqi@huawei.com Subject: Re: [RFC] simple_recursive_removal() Message-ID: <20191115221037.GW26530@ZenIV.linux.org.uk> References: <20191115131625.GO26530@ZenIV.linux.org.uk> <20191115083813.65f5523c@gandalf.local.home> <20191115134823.GQ26530@ZenIV.linux.org.uk> <20191115085805.008870cb@gandalf.local.home> <20191115141754.GR26530@ZenIV.linux.org.uk> <20191115175423.GS26530@ZenIV.linux.org.uk> <20191115184209.GT26530@ZenIV.linux.org.uk> <20191115194138.GU26530@ZenIV.linux.org.uk> <20191115211820.GV26530@ZenIV.linux.org.uk> <20191115162609.2d26d498@gandalf.local.home> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20191115162609.2d26d498@gandalf.local.home> User-Agent: Mutt/1.12.1 (2019-06-15) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Nov 15, 2019 at 04:26:09PM -0500, Steven Rostedt wrote: > On Fri, 15 Nov 2019 21:18:20 +0000 > Al Viro wrote: > > > OK... debugfs and tracefs definitely convert to that; so do, AFAICS, > > spufs and selinuxfs, and I wouldn't be surprised if it could be > > used in a few more places... securityfs, almost certainly qibfs, > > gadgetfs looks like it could make use of that. Maybe subrpc > > as well, but I'll need to look in details. configfs won't, > > unfortunately... > > Thanks Al for looking into this. > > I'll try to test it in tracefs, and see if anything breaks. But > probably wont get to it till next week. I'll probably throw that into #next.dcache - if nothing else, that cuts down on the size of patch converting d_subdirs/d_child from list to hlist... Need to get some sleep first, though - only 5 hours today, so I want to take another look at that thing tomorrow morning - I don't trust my ability to spot obvious bugs right now... ;-/ Oh, well - that at least might finally push the old "kernel-side rm -rf done right" pile of half-baked patches into more useful state, probably superseding most of them.