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Date:   Thu, 23 Jul 2020 19:50:29 -0700
From:   Andrew Morton <akpm@linux-foundation.org>
To:     Uladzislau Rezki <urezki@gmail.com>
Cc:     Qian Cai <cai@lca.pw>, bp@alien8.de, dave.hansen@linux.intel.com,
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        Dave Hansen <dave.hansen@linux.intel.com>,
        "H. Peter Anvin" <hpa@zytor.com>,
        Andy Lutomirski <luto@kernel.org>,
        Ingo Molnar <mingo@redhat.com>,
        Peter Zijlstra <peterz@infradead.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        Stephen Rothwell <sfr@canb.auug.org.au>,
        Pengfei Li <lpf.vector@gmail.com>,
        Shakeel Butt <shakeelb@google.com>,
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        Yafang Shao <laoar.shao@gmail.com>,
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        Dennis Zhou <dennis@kernel.org>,
        Naresh Kamboju <naresh.kamboju@linaro.org>
Subject: Re: kernel BUG at mm/vmalloc.c:LINE! (2)
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On Wed, 22 Jul 2020 16:46:50 +0200 Uladzislau Rezki <urezki@gmail.com> wrote:

> > > I can check further, but it can be it was not correctly reverted,
> > > because everything should work just fine even with the revert,
> > > though i i do not understand a reason of reverting.
> > 
> > Vlad, how sure are you about this? We also start to trigger this now on
> > linux-next, but the reverting patch surely looks like doggy without any useful
> > information in the commit description.
> >
> Hello, Andrew, Qian.
> 
> I am not aware of reason of the revert, though i tried to get through Ingo.
> I can send out a patch that fixes the revert. Another option to drop the
> revert, but it is up to Andrew and Ingo.
> 
> Andrew, could you please comment on?

All a bit mysterious.  I think it's best that we revert this from
linux-next until we hear from Ingo.  I queued a patch - I expect
Stephen will see and grab it, thanks.