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From:   Linus Torvalds <torvalds@linux-foundation.org>
Date:   Fri, 14 Aug 2020 10:00:44 -0700
Message-ID: <CAHk-=wj8oc=wCvqcMdpKM8cceEYmicpf++rNDWC_5A6qYDP9QQ@mail.gmail.com>
Subject: Re: [mm] 3e38e0aaca: WARNING:at_mm/memcontrol.c:#mem_cgroup_alloc
To:     kernel test robot <lkp@intel.com>
Cc:     Roman Gushchin <guro@fb.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        Shakeel Butt <shakeelb@google.com>,
        Dennis Zhou <dennis@kernel.org>,
        Johannes Weiner <hannes@cmpxchg.org>,
        Christoph Lameter <cl@linux.com>,
        David Rientjes <rientjes@google.com>,
        Joonsoo Kim <iamjoonsoo.kim@lge.com>,
        Mel Gorman <mgorman@techsingularity.net>,
        Michal Hocko <mhocko@kernel.org>,
        Pekka Enberg <penberg@kernel.org>, Tejun Heo <tj@kernel.org>,
        "Tobin C. Harding" <tobin@kernel.org>,
        Vlastimil Babka <vbabka@suse.cz>,
        Waiman Long <longman@redhat.com>,
        Bixuan Cui <cuibixuan@huawei.com>,
        =?UTF-8?Q?Michal_Koutn=C3=BD?= <mkoutny@suse.com>,
        Stephen Rothwell <sfr@canb.auug.org.au>,
        LKML <linux-kernel@vger.kernel.org>, lkp@lists.01.org
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On Fri, Aug 14, 2020 at 7:14 AM kernel test robot <lkp@intel.com> wrote:
>
> FYI, we noticed the following commit (built with gcc-9):
>
> commit: 3e38e0aaca9eafb12b1c4b731d1c10975cbe7974 ("mm: memcg: charge memcg percpu memory to the parent cgroup")
> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master
>
>
> in testcase: boot
>
> on test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 8G
>
> caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):

This should have already been fixed by commit 9f457179244a ("mm:
memcontrol: fix warning when allocating the root cgroup").

But I forget what the syntax is to report that to the kernel test
robot. Would it be possible for lkp automatically look for "Fixes:"
tags, perhaps?

                 Linus