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=-2.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_PASS,T_DKIMWL_WL_HIGH,URIBL_BLOCKED, USER_AGENT_MUTT autolearn=ham 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 10441C004C9 for ; Tue, 7 May 2019 08:24:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id CB3F720989 for ; Tue, 7 May 2019 08:24:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1557217459; bh=eUSQgtGWPy5pFKH1GUY8hxSIVNfzmhNgY4FrPa2GdiY=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=zBE5eZ3AAiNojwmL1JLFQDnAUlhRvCQhe01cQZ81jmIDRSYco7XGiAk5zBakbL92N a/wEHGkcNynNyiVM/yXO5ws2hy+ke12jbMeK9wDHM7AsEELnCgXFYOp84iYUk15PHR NL7hSQbp0IOhVc5/GtERpIZ1euC40F+eZMnND+UI= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726478AbfEGIYS (ORCPT ); Tue, 7 May 2019 04:24:18 -0400 Received: from mail-wr1-f66.google.com ([209.85.221.66]:37044 "EHLO mail-wr1-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726063AbfEGIYS (ORCPT ); Tue, 7 May 2019 04:24:18 -0400 Received: by mail-wr1-f66.google.com with SMTP id a12so10885291wrn.4 for ; Tue, 07 May 2019 01:24:17 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=sender:date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=W7d2mrADug3XTBNYsFOZammJ4d/L/QrWNlLiF6TfPyM=; b=eK5jW7pSEG9BtgYtYJvEbhxT2CoGybhtibMDNW0x7wOO3U91oxvhCyFBeaPevA2JRB eVnYQx7Z8vHA0ilSZif8qi3e3U3QwvC/RCzkApn8HT75XihnMbTPWiy5St1/wGIberaR 69YtTzuZZY7lUyNzfciRJFXSYub14BkNVb3AQa7mZA8KvRaz7lhwGacpB4NeBJh0s7Lu tQkYqi4NGFqB4+kCJ8oScUcpdcG/yK9dMiRxM90b2rIdxjDxiuoJQXk284N2k0kWvaHw NsP1LlAV8hv7w2OZLNneZ3/cbheepaFymtWNWiQGZOm1BKRaov3q3K+vELIWA5AggtMc femw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:date:from:to:cc:subject:message-id :references:mime-version:content-disposition:in-reply-to:user-agent; bh=W7d2mrADug3XTBNYsFOZammJ4d/L/QrWNlLiF6TfPyM=; b=lThyJKR1bCLGVrPgMSKJTFtJBy9dBeYOuEAjI16gmeqyqscrzaqsa77d3fT1usnWEz GRVReAnlj9tvn3xIvzQp2J7YryNq0gwkSvBhwSst1LvNv/q+cqIk7op+tkhaGOMMKcoz kWlaoTh5LrZADH0/aZJjb/IaFLOyu08gshMJkYtosOVQLJcasl/LFQtDEp2Wmvg8Cw/V YWWiUJlV9gC1L0NZs1Lu9WzI+9bSLezNFMYoU0Dm82eaNY2aDSndc5PMDYd0yyjM9hNO rKR1da39MirB8P6uUXZK/gyLZmX/ch7Yaxshd1a4c5FNYqCsJ6QiIxgR+jh12Rbl1Zuo T4Xw== X-Gm-Message-State: APjAAAWFUBPGEOkcGI3gmHCMghj5Ya3vyZ5AHnVpj7Kw/7APJewYbNHG g9Frf8E4Dm4M1wc1M/5Kr+s= X-Google-Smtp-Source: APXvYqw7NxYBTeDrgSa9VKE3q7FyImHDfeLB53MHdgmQTDwmv6YGCpWGqMC0Oqh+fveKUJw1J2Ah8A== X-Received: by 2002:adf:e902:: with SMTP id f2mr3615571wrm.301.1557217456841; Tue, 07 May 2019 01:24:16 -0700 (PDT) Received: from gmail.com (2E8B0CD5.catv.pool.telekom.hu. [46.139.12.213]) by smtp.gmail.com with ESMTPSA id i16sm8028436wrs.5.2019.05.07.01.24.15 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Tue, 07 May 2019 01:24:15 -0700 (PDT) Date: Tue, 7 May 2019 10:24:13 +0200 From: Ingo Molnar To: Linus Torvalds Cc: Waiman Long , Linux List Kernel Mailing , Peter Zijlstra , Will Deacon , Thomas Gleixner , Andrew Morton Subject: Re: [GIT PULL] locking changes for v5.2 Message-ID: <20190507082413.GA125993@gmail.com> References: <20190506085014.GA130963@gmail.com> <20190506194339.GA20938@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org * Linus Torvalds wrote: > On Mon, May 6, 2019 at 12:43 PM Ingo Molnar wrote: > > > > Sure - how close is this to a straight: > > > > git revert 70800c3c0cc5 > > It's not really a revert. The code is different (and better) from the > straight revert, but perhaps equally importantly it also ends up with > a big comment about what's going on that made the original commit > wrong. > > So I'd suggest just taking the patch as-is, and not calling it a > revert. It may revert to the original _model_ of wakup list traversal, > but it does so differently enough that the patch itself is not a > revert. Ok, Waiman's patch is now the following commit in locking/urgent: a9e9bcb45b15: ("locking/rwsem: Prevent decrement of reader count before increment") it should get to you in a couple of days. Thanks, Ingo