On Wed, May 19 2021 at 20:38, Naresh Kamboju wrote:
> While running LTP mm test suite on i386 kernel the following warning and BUG
> reported on linux next 5.13.0-rc2-next-20210519.
>
> The warning is not regression, We have been noticing these warnings often on
> i386
Noticing? Did you report them?
> but kernel BUG: looks to be a new crash.
It's just the consequence of the problem which is pointed out by the
warning. Fix below.
Thanks,
tglx
---
Subject: x86: Don't enable CONFIG_MOVE_PUD for 32bit and !PAE
From: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Date: Wed, 19 May 2021 20:37:34 +0200
MOVE_PUD cannot work for 2-level paging obviously.
Fixes: be37c98d1134 ("x86: mremap speedup - Enable HAVE_MOVE_PUD")
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Kalesh Singh <kaleshsingh@xxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
---
arch/x86/Kconfig | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -219,7 +219,7 @@ config X86
select HAVE_MIXED_BREAKPOINTS_REGS
select HAVE_MOD_ARCH_SPECIFIC
select HAVE_MOVE_PMD
- select HAVE_MOVE_PUD
+ select HAVE_MOVE_PUD if PGTABLE_LEVELS > 2
select HAVE_NMI
select HAVE_OPTPROBES
select HAVE_PCSPKR_PLATFORM
