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Message-ID: <a63eb223-455f-ae57-122f-7b2655e3de26@oracle.com>
Date: Fri, 11 Aug 2017 12:22:52 -0400
From: Pasha Tatashin <pasha.tatashin@...cle.com>
To: Michal Hocko <mhocko@...nel.org>
Cc: linux-kernel@...r.kernel.org, sparclinux@...r.kernel.org,
linux-mm@...ck.org, linuxppc-dev@...ts.ozlabs.org,
linux-s390@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
x86@...nel.org, kasan-dev@...glegroups.com, borntraeger@...ibm.com,
heiko.carstens@...ibm.com, davem@...emloft.net,
willy@...radead.org, ard.biesheuvel@...aro.org,
will.deacon@....com, catalin.marinas@....com, sam@...nborg.org,
Mel Gorman <mgorman@...e.de>
Subject: Re: [v6 04/15] mm: discard memblock data later
>> I will address your comment, and send out a new patch. Should I send it out
>> separately from the series or should I keep it inside?
>
> I would post it separatelly. It doesn't depend on the rest.
OK, I will post it separately. No it does not depend on the rest, but
the reset depends on this. So, I am not sure how to enforce that this
comes before the rest.
>
>> Also, before I send out a new patch, I will need to root cause and resolve
>> problem found by kernel test robot <fengguang.wu@...el.com>, and bisected
>> down to this patch.
>>
>> [ 156.659400] BUG: Bad page state in process swapper pfn:03147
>> [ 156.660051] page:ffff88001ed8a1c0 count:0 mapcount:-127 mapping:
>> (null) index:0x1
>> [ 156.660917] flags: 0x0()
>> [ 156.661198] raw: 0000000000000000 0000000000000000 0000000000000001
>> 00000000ffffff80
>> [ 156.662006] raw: ffff88001f4a8120 ffff88001ed85ce0 0000000000000000
>> 0000000000000000
>> [ 156.662811] page dumped because: nonzero mapcount
>> [ 156.663307] CPU: 0 PID: 1 Comm: swapper Not tainted
>> 4.13.0-rc3-00220-g1aad694 #1
>> [ 156.664077] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
>> 1.9.3-20161025_171302-gandalf 04/01/2014
>> [ 156.665129] Call Trace:
>> [ 156.665422] dump_stack+0x1e/0x20
>> [ 156.665802] bad_page+0x122/0x148
>
> Was the report related with this patch?
Yes, they said that the problem was bisected down to this patch. Do you
know if there is a way to submit a patch to this test robot?
Thank you,
Pasha
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