The quilt patch titled Subject: mm: disable CONFIG_PER_VMA_LOCK by default until its fixed has been removed from the -mm tree. Its filename was mm-disable-config_per_vma_lock-by-default-until-its-fixed.patch This patch was dropped because an alternative patch was or shall be merged ------------------------------------------------------ From: Suren Baghdasaryan Subject: mm: disable CONFIG_PER_VMA_LOCK by default until its fixed Date: Mon, 3 Jul 2023 11:21:50 -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 while the problem is being investigated. 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@google.com Link: https://lkml.kernel.org/r/20230703182150.2193578-1-surenb@google.com Fixes: 0bff0aaea03e ("x86/mm: try VMA lock-based page fault handling first") Signed-off-by: Suren Baghdasaryan Reported-by: Jiri Slaby Reported-by: Jacob Young Acked-by: David Rientjes Cc: Andy Lutomirski Cc: Axel Rasmussen Cc: Chris Li Cc: David Hildenbrand Cc: David Howells Cc: Davidlohr Bueso Cc: Eric Dumazet Cc: Greg Thelen Cc: Holger Hoffstätte Cc: Hugh Dickins Cc: Ingo Molnar Cc: Jann Horn Cc: Joel Fernandes Cc: Kent Overstreet Cc: Laurent Dufour Cc: Liam R. Howlett Cc: Lorenzo Stoakes Cc: Matthew Wilcox Cc: Mel Gorman Cc: Michal Hocko Cc: Michel Lespinasse Cc: Mike Rapoport (IBM) Cc: Minchan Kim Cc: "Paul E. McKenney" Cc: Peter Xu Cc: Cc: Punit Agrawal Cc: Sebastian Andrzej Siewior Cc: Shakeel Butt Cc: Song Liu Cc: Vlastimil Babka Cc: Will Deacon Signed-off-by: Andrew Morton --- mm/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/mm/Kconfig~mm-disable-config_per_vma_lock-by-default-until-its-fixed +++ a/mm/Kconfig @@ -1227,7 +1227,7 @@ 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 help Allow per-vma locking during page fault handling. _ Patches currently in -mm which might be from surenb@google.com are fork-lock-vmas-of-the-parent-process-when-forking.patch mm-disable-config_per_vma_lock-until-its-fixed.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