linux-kernel - Re: kernel BUG at mm/swap

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Date:   Wed, 29 May 2019 20:09:31 +0200
From:   Michal Hocko <mhocko@...nel.org>
To:     Mikhail Gavrilov <mikhail.v.gavrilov@...il.com>
Cc:     Linux List Kernel Mailing <linux-kernel@...r.kernel.org>,
        linux-mm@...ck.org
Subject: Re: kernel BUG at mm/swap_state.c:170!

On Wed 29-05-19 22:32:08, Mikhail Gavrilov wrote:
> On Wed, 29 May 2019 at 09:05, Mikhail Gavrilov
> <mikhail.v.gavrilov@...il.com> wrote:
> >
> > Hi folks.
> > I am observed kernel panic after update to git tag 5.2-rc2.
> > This crash happens at memory pressing when swap being used.
> >
> > Unfortunately in journalctl saved only this:
> >
> 
> Now I captured better trace.
> 
> : page:ffffd6d34dff0000 refcount:1 mapcount:1 mapping:ffff97812323a689
> index:0xfecec363
> : anon
> : flags: 0x17fffe00080034(uptodate|lru|active|swapbacked)
> : raw: 0017fffe00080034 ffffd6d34c67c508 ffffd6d3504b8d48 ffff97812323a689
> : raw: 00000000fecec363 0000000000000000 0000000100000000 ffff978433ace000
> : page dumped because: VM_BUG_ON_PAGE(entry != page)
> : page->mem_cgroup:ffff978433ace000
> : ------------[ cut here ]------------
> : kernel BUG at mm/swap_state.c:170!

Do you see the same with 5.2-rc1 resp. 5.1?
-- 
Michal Hocko
SUSE Labs