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=-15.6 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,INCLUDES_PULL_REQUEST, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS, 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 E8797C04AAF for ; Thu, 16 May 2019 22:38:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B4D192082E for ; Thu, 16 May 2019 22:38:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1558046295; bh=O3aAna4OKLt2YXhiPy3mAYtt6yGXq9TXqns2IOQYDkc=; h=Date:From:To:Cc:Subject:List-ID:From; b=rEr2F+ficpNMft0tuub+/U2AAPQ/sZaj6Vjh0aEdkVoc6iZ6FK4mSAkOMLI0NWhQO DQA4KYLLS3qPnO5nJNS35hVkQamcYolCm+2dDg894JB6FnLICew7DMM5nhNE/iO+6V 39AQsBCcrs9biZ21KK5AV/Gu/B5Y8a2J2wViQFtk= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728379AbfEPWiO (ORCPT ); Thu, 16 May 2019 18:38:14 -0400 Received: from mail-qt1-f194.google.com ([209.85.160.194]:33111 "EHLO mail-qt1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727333AbfEPWiO (ORCPT ); Thu, 16 May 2019 18:38:14 -0400 Received: by mail-qt1-f194.google.com with SMTP id m32so5980319qtf.0 for ; Thu, 16 May 2019 15:38:13 -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:mime-version :content-disposition:user-agent; bh=EWXzXtWxkqwu0CPQRvvsDDIoqrmy6tr8WAbR6k8JzAM=; b=OOMTDvz72lqgTdq6+PPpmUMakmyAIeVpw8XEX23d8uoFzmVfMdtjt79froGhRfX+YM uFXNh6TiWVlLUJ/wE5RKoQsCnBmejeQRRdTyNdYF+W/vSKLBICViF4tebAieNf/g7+iW 6ucVXtPb6SXZsj3Ii6UBSYZRjq9zg5IujkPYnKYBjR4oHY043Lup1e8On4u8mWNQh1ml TcdSVZBDZg9Xf77tMypcT5IhQwfkaK54Xd4cmalwRcT8W12qL92aWwo95GtlizpFjWFy xlpRocna7WanAwG0m1EHLzBW5+VPksagCmMgQRjKrAMxaCvi6ySXd7BtV7jl208KYqYB dIog== 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 :mime-version:content-disposition:user-agent; bh=EWXzXtWxkqwu0CPQRvvsDDIoqrmy6tr8WAbR6k8JzAM=; b=ADYL+MplG084WpVmxTR1SH/rDs2fKdwb3vv1S2Mjx444I8jlZw7pBqok4h611HZXS4 VzSiDe7XyMc3X5apY9KNBbQmTbL+pxB1dkPy6yiT0mQ7s6iZhCu80KsH/Qa289+yLmW5 iyMiXSEHuvXOjznss6gtJr+byGNNei6BBB1Zbi3Z3VUgda5jt+H1v0MkyZjRWrtJWzzN gCmNuIzYtk5l71EOlTKy3PIIEXXEJLFCg11RvPJDVApfkChNXrFktMCARqxj+umstddd jwSVB1bfPcPJ1RTqCgX5rtKWkpqXKaRtJ+h6PcM3Jq9074h4X+5w8H2auVSkz8AeGosP e6Pg== X-Gm-Message-State: APjAAAUtRSiMeJcnwbjsklxsc0LrSMPZqYSi9MM0IfnaLJxiULnIr2O4 XyqwYDeN2ZcY4PBhpYXiLbeCH05Y8KY= X-Google-Smtp-Source: APXvYqzFnJxEcraxL5XB4XkX9T/ORqzQd7xFl2GLz59pQfn9445Y8q3Cpu1mfyOh4VgYluYlqzN4fg== X-Received: by 2002:a0c:8ae9:: with SMTP id 38mr43048207qvw.157.1558046292944; Thu, 16 May 2019 15:38:12 -0700 (PDT) Received: from localhost ([2620:10d:c091:500::3:cd83]) by smtp.gmail.com with ESMTPSA id g206sm3169407qkb.75.2019.05.16.15.38.11 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 16 May 2019 15:38:12 -0700 (PDT) Date: Thu, 16 May 2019 15:38:10 -0700 From: Tejun Heo To: Linus Torvalds Cc: linux-kernel@vger.kernel.org, Roman Gushchin , Oleg Nesterov Subject: [GIT PULL] cgroup fix for v5.2-rc1 Message-ID: <20190516223752.GE374014@devbig004.ftw2.facebook.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, Linus. The cgroup2 freezer pulled in this cycle broke strace. This pull request includes a workaround for the problem. It's not a complete fix in that it may cause spurious frozen state flip-flops which is fairly minor. Will push a full fix once it's ready. Thanks. The following changes since commit 8c05f3b965da14e7790711026b32cc10a4c06213: Merge tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm (2019-05-16 09:41:54 -0700) are available in the Git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup.git for-5.2-fixes for you to fetch changes up to 05b289263772b0698589abc47771264a685cd365: signal: unconditionally leave the frozen state in ptrace_stop() (2019-05-16 10:43:58 -0700) ---------------------------------------------------------------- Roman Gushchin (1): signal: unconditionally leave the frozen state in ptrace_stop() kernel/signal.c | 1 + 1 file changed, 1 insertion(+) diff --git a/kernel/signal.c b/kernel/signal.c index c4dd66436fc5..a1eb44dc9ff5 100644 --- a/kernel/signal.c +++ b/kernel/signal.c @@ -2113,6 +2113,7 @@ static void ptrace_stop(int exit_code, int why, int clear_code, kernel_siginfo_t preempt_enable_no_resched(); cgroup_enter_frozen(); freezable_schedule(); + cgroup_leave_frozen(true); } else { /* * By the time we got the lock, our tracer went away. -- tejun