On Sat, 11 Jul 2020 at 01:35, Linus Torvalds torvalds@linux-foundation.org wrote:
On Fri, Jul 10, 2020 at 10:48 AM Naresh Kamboju naresh.kamboju@linaro.org wrote:
I have started bisecting this problem and found the first bad commit
commit 9f132f7e145506efc0744426cb338b18a54afc3b Author: Joel Fernandes (Google) joel@joelfernandes.org Date: Thu Jan 3 15:28:41 2019 -0800
mm: select HAVE_MOVE_PMD on x86 for faster mremap
Moving page-tables at the PMD-level on x86 is known to be safe. Enable this option so that we can do fast mremap when possible.
Link: http://lkml.kernel.org/r/20181108181201.88826-4-joelaf@google.com Signed-off-by: Joel Fernandes (Google) joel@joelfernandes.org Suggested-by: Kirill A. Shutemov kirill@shutemov.name Acked-by: Kirill A. Shutemov kirill@shutemov.name Cc: Julia Lawall Julia.Lawall@lip6.fr Cc: Michal Hocko mhocko@kernel.org Cc: William Kucharski william.kucharski@oracle.com Signed-off-by: Andrew Morton akpm@linux-foundation.org Signed-off-by: Linus Torvalds torvalds@linux-foundation.org
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index e260460210e1..6185d4f33296 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -172,6 +172,7 @@ config X86 select HAVE_MEMBLOCK_NODE_MAP select HAVE_MIXED_BREAKPOINTS_REGS select HAVE_MOD_ARCH_SPECIFIC + select HAVE_MOVE_PMD select HAVE_NMI select HAVE_OPROFILE select HAVE_OPTPROBES
After reverting the above patch the reported kernel warning got fixed on Linus mainline tree 5.8.0-rc4.