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 Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1D1B5C61DA4 for ; Mon, 6 Feb 2023 04:44:41 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 232B16B0072; Sun, 5 Feb 2023 23:44:41 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 1E2606B0073; Sun, 5 Feb 2023 23:44:41 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 0AB216B0074; Sun, 5 Feb 2023 23:44:41 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0014.hostedemail.com [216.40.44.14]) by kanga.kvack.org (Postfix) with ESMTP id F0CED6B0072 for ; Sun, 5 Feb 2023 23:44:40 -0500 (EST) Received: from smtpin22.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay08.hostedemail.com (Postfix) with ESMTP id B4C2C140A21 for ; Mon, 6 Feb 2023 04:44:40 +0000 (UTC) X-FDA: 80435626320.22.D0A332C Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) by imf14.hostedemail.com (Postfix) with ESMTP id DABD7100015 for ; Mon, 6 Feb 2023 04:44:38 +0000 (UTC) Authentication-Results: imf14.hostedemail.com; dkim=pass header.d=infradead.org header.s=casper.20170209 header.b="c77iJQ/w"; spf=none (imf14.hostedemail.com: domain of willy@infradead.org has no SPF policy when checking 90.155.50.34) smtp.mailfrom=willy@infradead.org; dmarc=none ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1675658679; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=vnoxxnFupsctnz6PYmQvdvAVDmQ6Sog6ZUyHJ5kggYs=; b=P7qO/cJ2Xcb0iao1OBPkJG2zXpXCizJWpy6AAs9qgHtmhwDfEZw5QmXMNpLWEhnaW84vtP Y4ugSc0nWje/BUtG4TfhVBGNiQTxDUezUBoptT0WJVhhazwlm6DWLa795RstfJEETdkuar 16nossA/IJirWeAEIATtoP+O5QXLgRs= ARC-Authentication-Results: i=1; imf14.hostedemail.com; dkim=pass header.d=infradead.org header.s=casper.20170209 header.b="c77iJQ/w"; spf=none (imf14.hostedemail.com: domain of willy@infradead.org has no SPF policy when checking 90.155.50.34) smtp.mailfrom=willy@infradead.org; dmarc=none ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1675658679; a=rsa-sha256; cv=none; b=7sshChzAm9RkDRGdcBnIB2+VWCtu0VAZFEsh19d1CyEpgjrVhJBwx2iyHkStGWcVjRuhE+ aG7nBL/qIUl0fJPzUK1+6Ix9Q5Gz3NyT30XjOP3dCjyTugtXDffxigZ8LvYqFHk8oem+rK mfe/MSxahMJgHc4AwedapUVFiy37su8= DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.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=vnoxxnFupsctnz6PYmQvdvAVDmQ6Sog6ZUyHJ5kggYs=; b=c77iJQ/wF72o+8X2qH2VVeUYy/ pMn9C95oNhdcjSzx3+dRwU3ungMEHHYItlf7JDThl7+h0LMGkQAyPZVrJrwZBwAbOu3MY8cnTUw15 eWlKKCmMIdmZk3Z7hrX8gUFJ5DPQBQCwcBPPZd9Mzhk++k0pN5FFlxIUXAGiozfQgI0W/mr7+ujpB cdKQNUuyC4lQPyz4q8q4WZOqcO9hh7mvgpdg/Ks2+tbwXXXOOkmnA+YO1S1RXSksYjoVpCjG3KL9q PjNTY0XSxU2X2Da5KRjpSH+WIscWKX2E3L2K08mBeAmZ9q/qG80XJUpr2wBfKB+z92CSbvBS7vnB6 4aseEvkg==; Received: from willy by casper.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1pOtMX-00GTNl-N0; Mon, 06 Feb 2023 04:44:17 +0000 Date: Mon, 6 Feb 2023 04:44:17 +0000 From: Matthew Wilcox To: Hillf Danton Cc: Alan Stern , Tetsuo Handa , Greg Kroah-Hartman , "Rafael J. Wysocki" , linux-mm@kvack.org, LKML , USB list , Linus Torvalds Subject: Re: Converting dev->mutex into dev->spinlock ? Message-ID: References: <28a82f50-39d5-a45f-7c7a-57a66cec0741@I-love.SAKURA.ne.jp> <917e1e3b-094f-e594-c1a2-8b97fb5195fd@I-love.SAKURA.ne.jp> <20230206025629.1786-1-hdanton@sina.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20230206025629.1786-1-hdanton@sina.com> X-Rspam-User: X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: DABD7100015 X-Stat-Signature: 9ng38og4amdg9s7wzxtpatet3w5pjpk7 X-HE-Tag: 1675658678-706015 X-HE-Meta: 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 3St3K07e l41gpX4lgn7GbMkVlhM0e7Kby8oPWnK09HspX4Uba3X0fQMJwUWeoxrpUFOFjBYwdTnbDmMRyWtFvzW5habWbCtxzYBOYsVSNhsG9eCCu0SmCZMJrAxq8W/khHouVx2m1gB6gk7l6eBPNfxa93w8fE9RwoKR4Tu8fHPblJlFEIq84AF9AKfHLamTuktfCcUrj5vigJemGpb91Bak= 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 Mon, Feb 06, 2023 at 10:56:29AM +0800, Hillf Danton wrote: > On Sun, 5 Feb 2023 11:46:06 -0500 Alan Stern > > > > And by the way, by disabling lockdep validation I am declaraing that > > enabling it would cause an overwhelming number of false positives, > > Could you share 5 false positives you see upstream to help understand how > it is useless? I've asked you before to stop cc'ing linux-mm on things which aren't about memory management. Now I'm asking you publically.