* Regression in 4.18 - 32-bit PowerPC crashes on boot - bisected to commit 1d40a5ea01d5
@ 2018-06-28 5:05 Larry Finger
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From: Larry Finger @ 2018-06-28 5:05 UTC (permalink / raw)
To: Matthew Wilcox, Kirill A. Shutemov, Vlastimil Babka,
Christoph Lameter, Dave Hansen, Jérôme Glisse,
Lai Jiangshan, Martin Schwidefsky, Pekka Enberg, Randy Dunlap,
Andrey Ryabinin, Andrew Morton, Linus Torvalds,
Benjamin Herrenschmidt, Paul Mackerras, Michael Ellerman
Cc: linuxppc-dev, LKML
My PowerBook G4 Aluminum crashes on boot with 4.18-rcX kernels with a kernel BUG
at include/linux/page-flags.h:700! The problem was bisected to commit
1d40a5ea01d5 ("mm: mark pages in use for page tables"). It is not possible to
capture the bug with anything other than a camera. The first few lines of the
traceback are as follows:
free_pgd_range+0x19c/0x30c (unreliable)
free_pgtables_0xa0/0xb0
exit_pmap+0xf4/0x16c
mmput+0x64/0xf0
do_exit+0x33c/0x89c
oops_end+0x13c/0x144
_exception_pkey+0x58/0x128
ret_from_except_full+0x0/0x4
--- interrupt: 700 at free_pgd_range+0x19c/0x30c
LR = free_pgd_range+0x19c/0x30c
free_pgtables+0xa/0xb
exit_mnap+0xf4/0x16c
mmput+0x64/0xf0
flush_old_exec+0x490/0x550
I have a PDF of the complete dump, but I hesitate to send this to the entire group.
Thanks,
Larry
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2018-06-28 5:05 Regression in 4.18 - 32-bit PowerPC crashes on boot - bisected to commit 1d40a5ea01d5 Larry Finger
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