Re: [linux-next:master] [mm] bbcbf2a3f0: kernel_BUG_at_mm/memory.c

[David Hildenbrand]

On 22.12.23 09:13, Oliver Sang wrote:
> hi, David,
>
> On Thu, Dec 21, 2023 at 11:07:21PM +0100, David Hildenbrand wrote:
> > On 21.12.23 22:58, Andrew Morton wrote:
> > > On Thu, 21 Dec 2023 12:32:04 +0100 David Hildenbrand <david@xxxxxxxxxx> wrote:
> > >
> > > > 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@xxxxxxxxx> 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.
> > >
> > > I think a full patch would be better, please.
>
> we cannot reproduce the issue reported previously after applying below patch.

Thanks for verifying and happy holidays!

--
Cheers,

David / dhildenb