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Message-ID: <e0e7d631-0af4-46fc-b606-78de07ebb88a@redhat.com>
Date: Thu, 21 Dec 2023 12:32:04 +0100
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Subject: Re: [linux-next:master] [mm] bbcbf2a3f0: kernel_BUG_at_mm/memory.c
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To: Oliver Sang <oliver.sang@intel.com>,
 Andrew Morton <akpm@linux-foundation.org>
Cc: Matthew Wilcox <willy@infradead.org>, oe-lkp@lists.linux.dev,
 lkp@intel.com, Linux Memory Management List <linux-mm@kvack.org>,
 linux-kernel@vger.kernel.org
References: <202312192319.fa8f5709-oliver.sang@intel.com>
 <20231220141135.cb4241442b657104f0aeae34@linux-foundation.org>
 <ZYQgGmYNfF8j4JqL@xsang-OptiPlex-9020>
From: David Hildenbrand <david@redhat.com>
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In-Reply-To: <ZYQgGmYNfF8j4JqL@xsang-OptiPlex-9020>
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On 21.12.23 12:23, Oliver Sang wrote:
> hi, Andrew Morton,
> 
> On Wed, Dec 20, 2023 at 02:11:35PM -0800, Andrew Morton wrote:
>> On Tue, 19 Dec 2023 23:46:50 +0800 kernel test robot <oliver.sang@intel.com> wrote:
>>
>>>
>>>
>>> Hello,
>>>
>>> kernel test robot noticed "kernel_BUG_at_mm/memory.c" on:
>>>
>>> commit: bbcbf2a3f05f74f9d268eab57abbdce6a65a94ad ("mm: convert ksm_might_need_to_copy() to work on folios")
>>
>> I assume this is a bisection result, so it's quite repeatable?
> 
> yes, we bisect to this commit, it's quite repeatable:
> 
> ddd06bb63d9793ce bbcbf2a3f05f74f9d268eab57ab
> ---------------- ---------------------------
>         fail:runs  %reproduction    fail:runs
>             |             |             |
>             :6          100%           6:6     dmesg.Kernel_panic-not_syncing:Fatal_exception
>             :6          100%           6:6     dmesg.RIP:do_swap_page
>             :6          100%           6:6     dmesg.invalid_opcode:#[##]
>             :6          100%           6:6     dmesg.kernel_BUG_at_mm/memory.c
> 
> 

Can you try with the snipped I sent? Please let me know if you need a 
full patch for testing purposes.

-- 
Cheers,

David / dhildenb