* Re: [bug/bisected] I see "mm/pgtable-generic.c:53: bad pmd (____ptrval____)(8000000100077061)" every boot time
[not found] <CABXGCsN3JqXckWO=V7p=FhPU1tK03RE1w9UE6xL5Y86SMk209w@mail.gmail.com>
@ 2023-07-16 3:12 ` Bagas Sanjaya
2023-07-16 11:23 ` Bagas Sanjaya
0 siblings, 1 reply; 2+ messages in thread
From: Bagas Sanjaya @ 2023-07-16 3:12 UTC (permalink / raw
To: Mikhail Gavrilov, Linux Memory Management List,
Linux Kernel Mailing List, hughd
Cc: Linux Regressions
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On Sat, Jul 15, 2023 at 02:24:59PM +0500, Mikhail Gavrilov wrote:
> Hi,
> It's ok that I see "mm/pgtable-generic.c:53: bad pmd
> (____ptrval____)(8000000100077061)" every boot time?
> Unfortunately bisect couldn't say which of commits
> # possible first bad commit:
> [be872f83bf571f4f9a0ac25e2c9c36e905a36619] mm/pagewalk:
> walk_pte_range() allow for pte_offset_map()
> # possible first bad commit:
> [7780d04046a2288ab85d88bedacc60fa4fad9971] mm/pagewalkers:
> ACTION_AGAIN if pte_offset_map_lock() fails
> # possible first bad commit:
> [2798bbe75b9c2752b46d292e5c2a49f49da36418] mm/page_vma_mapped:
> pte_offset_map_nolock() not pte_lockptr()
> # possible first bad commit:
> [90f43b0a13cddb09e2686f4d976751c0a9b8b197] mm/page_vma_mapped:
> reformat map_pte() with less indentation
> # possible first bad commit:
> [45fe85e9811ede2d65b21724cae50d6a0563e452] mm/page_vma_mapped: delete
> bogosity in page_vma_mapped_walk()
> # possible first bad commit:
> [65747aaf42b7db6acb8e57a2b8e9959928f404dd] mm/filemap: allow
> pte_offset_map_lock() to fail
> # possible first bad commit:
> [0d940a9b270b9220dcff74d8e9123c9788365751] mm/pgtable: allow
> pte_offset_map[_lock]() to fail
> definitely first bad because my machine on which I am was doing
> bisection is unbootable on these commits.
> I hope Hugh Dickins can figure out what's going on here. He is the
> author of these commits.
>
> All mine machines are based on the AMD platform two 7950X and one 5900HX.
>
> It seems that this message is harmless for the system in any way, but
> I can't judge it is a bug or not.
> >From the user side it looks like regression because on commit
> 46c475bd676bb05077c8a38b37f175552f035406 this message was absent.
What are you doing on your system that leads into this regression?
Anyway, I'm adding this regression to be tracked with regzbot:
#regzbot ^introduced: 0d940a9b270b92
#regzbot title: undescribed regression due to allowing failing pte_offset_map[_lock]()
Thanks.
--
An old man doll... just what I always wanted! - Clara
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^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [bug/bisected] I see "mm/pgtable-generic.c:53: bad pmd (____ptrval____)(8000000100077061)" every boot time
2023-07-16 3:12 ` [bug/bisected] I see "mm/pgtable-generic.c:53: bad pmd (____ptrval____)(8000000100077061)" every boot time Bagas Sanjaya
@ 2023-07-16 11:23 ` Bagas Sanjaya
0 siblings, 0 replies; 2+ messages in thread
From: Bagas Sanjaya @ 2023-07-16 11:23 UTC (permalink / raw
To: Mikhail Gavrilov, Linux Memory Management List,
Linux Kernel Mailing List, hughd
Cc: Linux Regressions, Laura Abbott
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On Sun, Jul 16, 2023 at 10:12:13AM +0700, Bagas Sanjaya wrote:
> #regzbot ^introduced: 0d940a9b270b92
> #regzbot title: undescribed regression due to allowing failing pte_offset_map[_lock]()
>
Updating entry title (see [1] for why):
#regzbot title: CONFIG_EFI_PGT_DUMP regression due to allowing failing pte_offset_map[_lock]()
Thanks.
[1]: https://lore.kernel.org/linux-mm/CABXGCsMaMgcPskMHPL+E=cOf9YMyaSnxg2dMa2jWO7qbjZGkjQ@mail.gmail.com/
--
An old man doll... just what I always wanted! - Clara
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2023-07-16 3:12 ` [bug/bisected] I see "mm/pgtable-generic.c:53: bad pmd (____ptrval____)(8000000100077061)" every boot time Bagas Sanjaya
2023-07-16 11:23 ` Bagas Sanjaya
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