Received: by 2002:ac0:a5a6:0:0:0:0:0 with SMTP id m35-v6csp2850609imm; Mon, 24 Sep 2018 10:58:04 -0700 (PDT) X-Google-Smtp-Source: ACcGV62LRT8D8BtzWDHGVBKydSOlDdSKwtwfktAdoop7Vz4Ty2BX0/Ay4vFFl5D3HQwQ1PZnGLQ/ X-Received: by 2002:a65:6654:: with SMTP id z20-v6mr10591406pgv.186.1537811884032; Mon, 24 Sep 2018 10:58:04 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1537811884; cv=none; d=google.com; s=arc-20160816; b=Vhturdn07EAFSUqfNqW9QDoKiXn7spLZA4MchQCfzrX2dY3VMEcf85Qoj4FvRQbaXs Q9hEQJeJtWVpjbIQ4dJnP9D0DI1oB/f8Gt1HrKXZg54oaTCLZhbRcf0tvMXXyjH2TjhY WVgCgU0K7YO8C9Dlkry7V+94pHonQjKbomI5GO1JnPHGuL+7jfHRKMQ7Uzz5iljlJs1S NozdtBzKIUbnbegqcA5C43Zdmu8oFNMlocAeoAxHGRcxEsk1VQFu2WV783XSoV2hpcv6 OW3YztYQWuXu7aGCf+AZaZ4r63zOM1fsSVDDOmX1GbVgsZ0W2v1EMznoWC6CsbhqfNXT 4bcg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:user-agent:in-reply-to :content-disposition:mime-version:references:message-id:subject:cc :to:from:date; bh=DO6efr++jBQjhTZSfQLbkNRd4V8lNg1ZqqwmU8GDmDI=; b=Qv6XVaYbMSzf94r8IU4TmNBKsm91vXEWiSKoltUueE+6IiGzHTm3UwVIOwSsM7b1jB ISNMoHtFCdYIZEyjCn0UNvrdcjg+tdeYwmZhq/KX9USMlPBONXt/cn963XTnlGJ8xje5 YkQSl+HTNST1ZjWTzzK/Q9NmzrlFi7SZG8kncwt07zwj/X7VruW0howbNSftl9aWa9+S b0NqQc4ACXgNuqhni2eE8gV66DBnmt/9hYnX2SsadQ5qfMDjmPJgMHiP3hxbe/kXEO6Y eznlvrbZhuGczue/8bN8xL2csC13n23xe3FFuQZ+z4Psy646D79zw1P8pwsCGFxRYvwu gNcA== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id c2-v6si34401131pfn.212.2018.09.24.10.57.48; Mon, 24 Sep 2018 10:58:04 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730129AbeIYAAX (ORCPT + 99 others); Mon, 24 Sep 2018 20:00:23 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:53756 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728480AbeIYAAX (ORCPT ); Mon, 24 Sep 2018 20:00:23 -0400 Received: from localhost (ip-213-127-77-73.ip.prioritytelecom.net [213.127.77.73]) by mail.linuxfoundation.org (Postfix) with ESMTPSA id 5AEBCFF1; Mon, 24 Sep 2018 17:57:03 +0000 (UTC) Date: Mon, 24 Sep 2018 19:56:59 +0200 From: Greg Kroah-Hartman To: "Paul E. McKenney" Cc: linux-kernel@vger.kernel.org, stable@vger.kernel.org, Sasha Levin Subject: Re: [PATCH 4.18 207/235] rcu: Fix grace-period hangs due to race with CPU offline Message-ID: <20180924175659.GA19402@kroah.com> References: <20180924113103.999624566@linuxfoundation.org> <20180924113124.637508442@linuxfoundation.org> <20180924164406.GE4222@linux.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20180924164406.GE4222@linux.ibm.com> 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 On Mon, Sep 24, 2018 at 09:44:06AM -0700, Paul E. McKenney wrote: > On Mon, Sep 24, 2018 at 01:53:13PM +0200, Greg Kroah-Hartman wrote: > > 4.18-stable review patch. If anyone has any objections, please let me know. > > This should not be needed in 4.18 because of a number of crude but > effective grace-period forward-progress failsafes. I have not tested > it in isolation. It looks harmless enough, but all testing has been in > conjunction with a large number of preceding patches. > > I therefore strongly recommend against backporting this one. Now dropped from all 3 queues, thanks for letting me know. greg k-h