From: Naresh Kamboju <naresh.kamboju@linaro.org>
To: Roman Gushchin <guro@fb.com>, Michal Hocko <mhocko@kernel.org>
Cc: Christoph Lameter <cl@linux.com>,
Johannes Weiner <hannes@cmpxchg.org>,
Shakeel Butt <shakeelb@google.com>,
linux-mm <linux-mm@kvack.org>, Vlastimil Babka <vbabka@suse.cz>,
Kernel Team <kernel-team@fb.com>,
open list <linux-kernel@vger.kernel.org>,
Yafang Shao <laoar.shao@gmail.com>,
lkft-triage@lists.linaro.org,
Andrew Morton <akpm@linux-foundation.org>
Subject: Re: PANIC: mm: memcg/slab: percpu_ref_put_many - Unable to handle kernel paging request at virtual address ffff80096d78f000
Date: Thu, 2 Jul 2020 21:28:05 +0530 [thread overview]
Message-ID: <CA+G9fYsTRmtD=wUwS1X6wrUcVKEfvcLfmAc3uUJGVcx-Oqyykw@mail.gmail.com> (raw)
In-Reply-To: <20200701081951.GL2369@dhcp22.suse.cz>
On Wed, 1 Jul 2020 at 13:49, Michal Hocko <mhocko@kernel.org> wrote:
>
> On Wed 01-07-20 13:24:54, Naresh Kamboju wrote:
> > While running LTP mm test suite on arm64 Juno device the kernel panic
> > noticed on linux-next 20200630 tag.
>
> Can you try to bisect? The new memcg slab allocator series sounds like a
> potential candidate. One of the patches has changed the memcg reference
> counting which is showing up on the stack. This might be a side effect
> of something else of course but bisection would tell us more.
The reported problem is fixed by a patch proposed in this email thread.
https://lore.kernel.org/linux-mm/20200701184552.GA61684@carbon.DHCP.thefacebook.com/
- Naresh
>
> Thanks
>
> --
> Michal Hocko
> SUSE Labs
prev parent reply other threads:[~2020-07-02 15:58 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-01 7:54 Naresh Kamboju
2020-07-01 8:19 ` Michal Hocko
2020-07-02 15:58 ` Naresh Kamboju [this message]
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