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=-3.6 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED 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 B529CC433E2 for ; Tue, 19 May 2020 15:36:57 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 7B7F0207D8 for ; Tue, 19 May 2020 15:36:57 +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="alhwMGYn" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7B7F0207D8 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 0650180005; Tue, 19 May 2020 11:36:57 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id F308D900002; Tue, 19 May 2020 11:36:56 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id E206780005; Tue, 19 May 2020 11:36:56 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0182.hostedemail.com [216.40.44.182]) by kanga.kvack.org (Postfix) with ESMTP id C5B26900002 for ; Tue, 19 May 2020 11:36:56 -0400 (EDT) Received: from smtpin14.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id 8582517AAC for ; Tue, 19 May 2020 15:36:56 +0000 (UTC) X-FDA: 76833871632.14.cord82_59a8aa4fc222e X-HE-Tag: cord82_59a8aa4fc222e X-Filterd-Recvd-Size: 2395 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) by imf29.hostedemail.com (Postfix) with ESMTP for ; Tue, 19 May 2020 15:36:55 +0000 (UTC) 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=hlXeYEx61e2dpv4e5nUYpsc8cj1KDFe3uADuD6pRwsk=; b=alhwMGYnLcWkesAdX0d+S9orsd 1KKvGGLQoDUeQZvvKFjyvGImEd2ZFCTYLnrygsRqjRoP4rj8Ei2ZH6OTOP36Jt21IgY+yHycdswLb 7itYT9KNiAhN4/QJp8h/5Me1OTX1pDtlbCH2dSt11Q3/hzxfIZwxv0YgECZmEuXSUuRLXpIvTC5Oj aUFFLn5JCzFiTRewt3qvFuAEwQPSTU/5cKwtQEfYNwiqUcB/kt0ZBhUr0WyXfj6upJlALVRDlqRxm u1MBoSx0aOydQZ1QLtmDkcJA1/o+eqjKAyueQJ4+gPYFEFD/gnzIZD0f3lEN5d5PRVJ/ijYMM4gvZ krNjA0dw==; Received: from hch by bombadil.infradead.org with local (Exim 4.92.3 #3 (Red Hat Linux)) id 1jb4I5-0000Yg-DM; Tue, 19 May 2020 15:36:25 +0000 Date: Tue, 19 May 2020 08:36:25 -0700 From: Christoph Hellwig To: Luis Chamberlain Cc: axboe@kernel.dk, viro@zeniv.linux.org.uk, bvanassche@acm.org, gregkh@linuxfoundation.org, rostedt@goodmis.org, mingo@redhat.com, jack@suse.cz, ming.lei@redhat.com, nstange@suse.de, akpm@linux-foundation.org, mhocko@suse.com, yukuai3@huawei.com, linux-block@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v5 7/7] loop: be paranoid on exit and prevent new additions / removals Message-ID: <20200519153625.GB21875@infradead.org> References: <20200516031956.2605-1-mcgrof@kernel.org> <20200516031956.2605-8-mcgrof@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200516031956.2605-8-mcgrof@kernel.org> X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Sat, May 16, 2020 at 03:19:56AM +0000, Luis Chamberlain wrote: > Be pedantic on removal as well and hold the mutex. > This should prevent uses of addition while we exit. > > Reviewed-by: Ming Lei > Signed-off-by: Luis Chamberlain Looks good, Reviewed-by: Christoph Hellwig