The quilt patch titled
Subject: mm: disable CONFIG_PER_VMA_LOCK until its fixed
has been removed from the -mm tree. Its filename was
mm-disable-config_per_vma_lock-until-its-fixed.patch
This patch was dropped because it is obsolete
------------------------------------------------------
From: Suren Baghdasaryan <surenb@xxxxxxxxxx>
Subject: mm: disable CONFIG_PER_VMA_LOCK until its fixed
Date: Wed, 5 Jul 2023 18:14:00 -0700
A memory corruption was reported in [1] with bisection pointing to the
patch [2] enabling per-VMA locks for x86. Disable per-VMA locks config to
prevent this issue until the fix is confirmed. This is expected to be a
temporary measure.
[1] https://bugzilla.kernel.org/show_bug.cgi?id=217624
[2] https://lore.kernel.org/all/20230227173632.3292573-30-surenb@xxxxxxxxxx
Link: https://lkml.kernel.org/r/20230706011400.2949242-3-surenb@xxxxxxxxxx
Reported-by: Jiri Slaby <jirislaby@xxxxxxxxxx>
Closes: https://lore.kernel.org/all/dbdef34c-3a07-5951-e1ae-e9c6e3cdf51b@xxxxxxxxxx/
Reported-by: Jacob Young <jacobly.alt@xxxxxxxxx>
Closes: https://bugzilla.kernel.org/show_bug.cgi?id=217624
Fixes: 0bff0aaea03e ("x86/mm: try VMA lock-based page fault handling first")
Signed-off-by: Suren Baghdasaryan <surenb@xxxxxxxxxx>
Cc: David Hildenbrand <david@xxxxxxxxxx>
Cc: Holger Hoffstätte <holger@xxxxxxxxxxxxxxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/Kconfig | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/mm/Kconfig~mm-disable-config_per_vma_lock-until-its-fixed
+++ a/mm/Kconfig
@@ -1224,8 +1224,9 @@ config ARCH_SUPPORTS_PER_VMA_LOCK
def_bool n
config PER_VMA_LOCK
- def_bool y
+ bool "Enable per-vma locking during page fault handling."
depends on ARCH_SUPPORTS_PER_VMA_LOCK && MMU && SMP
+ depends on BROKEN
help
Allow per-vma locking during page fault handling.
_
Patches currently in -mm which might be from surenb@xxxxxxxxxx are
mm-lock-a-vma-before-stack-expansion.patch
mm-lock-newly-mapped-vma-which-can-be-modified-after-it-becomes-visible.patch
swap-remove-remnants-of-polling-from-read_swap_cache_async.patch
mm-add-missing-vm_fault_result_trace-name-for-vm_fault_completed.patch
mm-drop-per-vma-lock-when-returning-vm_fault_retry-or-vm_fault_completed.patch
mm-change-folio_lock_or_retry-to-use-vm_fault-directly.patch
mm-handle-swap-page-faults-under-per-vma-lock.patch
mm-handle-userfaults-under-vma-lock.patch
