+ mm-update-validate_mm-to-use-vma-iterator-fix.patch added to mm-unstable branch

+ mm-update-validate_mm-to-use-vma-iterator-fix.patch added to mm-unstable branch

[Andrew Morton]

The patch titled
     Subject: mm: update validate_mm() to use vma iterator CONFIG flag
has been added to the -mm mm-unstable branch.  Its filename is
     mm-update-validate_mm-to-use-vma-iterator-fix.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-update-validate_mm-to-use-vma-iterator-fix.patch

This patch will later appear in the mm-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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------------------------------------------------------
From: "Liam R. Howlett" <Liam.Howlett@oracle.com>
Subject: mm: update validate_mm() to use vma iterator CONFIG flag
Date: Tue, 6 Jun 2023 14:35:38 -0400

The validate_mm() function was deemed too heavy to enable with
CONFIG_DEBUG_VM [1].  Revert the config option to
CONFIG_DEBUG_VM_MAPLE_TREE

Link: https://lkml.kernel.org/r/20230606183538.588190-1-Liam.Howlett@oracle.com
Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: David Binderman <dcb314@hotmail.com>
Cc: Peng Zhang <zhangpeng.00@bytedance.com>
Cc: Sergey Senozhatsky <senozhatsky@chromium.org>
Cc: Vernon Yang <vernon2gm@gmail.com>
Cc: Wei Yang <richard.weiyang@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/mmap.c |    9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

--- a/mm/mmap.c~mm-update-validate_mm-to-use-vma-iterator-fix
+++ a/mm/mmap.c
@@ -299,7 +299,7 @@ out:
 	return origbrk;
 }
 
-#if defined(CONFIG_DEBUG_VM)
+#if defined(CONFIG_DEBUG_VM_MAPLE_TREE)
 static void validate_mm(struct mm_struct *mm)
 {
 	int bug = 0;
@@ -307,10 +307,7 @@ static void validate_mm(struct mm_struct
 	struct vm_area_struct *vma;
 	VMA_ITERATOR(vmi, mm, 0);
 
-#if defined(CONFIG_DEBUG_VM_MAPLE_TREE)
 	mt_validate(&mm->mm_mt);
-#endif
-
 	for_each_vma(vmi, vma) {
 #ifdef CONFIG_DEBUG_VM_RB
 		struct anon_vma *anon_vma = vma->anon_vma;
@@ -353,9 +350,9 @@ static void validate_mm(struct mm_struct
 	VM_BUG_ON_MM(bug, mm);
 }
 
-#else /* !CONFIG_DEBUG_VM */
+#else /* !CONFIG_DEBUG_VM_MAPLE_TREE */
 #define validate_mm(mm) do { } while (0)
-#endif /* CONFIG_DEBUG_VM */
+#endif /* CONFIG_DEBUG_VM_MAPLE_TREE */
 
 /*
  * vma has some anon_vma assigned, and is already inserted on that
_

Patches currently in -mm which might be from Liam.Howlett@oracle.com are

maple_tree-fix-static-analyser-cppcheck-issue.patch
maple_tree-avoid-unnecessary-ascending.patch
maple_tree-clean-up-mas_dfs_postorder.patch
maple_tree-add-debug-bug_on-and-warn_on-variants.patch
maple_tree-use-mas_bug_on-when-setting-a-leaf-node-as-a-parent.patch
maple_tree-use-mas_bug_on-in-mas_set_height.patch
maple_tree-use-mas_bug_on-from-mas_topiary_range.patch
maple_tree-use-mas_wr_bug_on-in-mas_store_prealloc.patch
maple_tree-use-mas_bug_on-prior-to-calling-mas_meta_gap.patch
maple_tree-return-error-on-mte_pivots-out-of-range.patch
maple_tree-make-test-code-work-without-debug-enabled.patch
mm-update-validate_mm-to-use-vma-iterator.patch
mm-update-validate_mm-to-use-vma-iterator-fix.patch
mm-update-vma_iter_store-to-use-mas_warn_on.patch
maple_tree-add-__init-and-__exit-to-test-module.patch
maple_tree-remove-unnecessary-check-from-mas_destroy.patch
maple_tree-mas_start-reset-depth-on-dead-node.patch
mm-mmap-change-do_vmi_align_munmap-for-maple-tree-iterator-changes.patch
maple_tree-try-harder-to-keep-active-node-after-mas_next.patch
maple_tree-try-harder-to-keep-active-node-with-mas_prev.patch
maple_tree-revise-limit-checks-in-mas_empty_area_rev.patch
maple_tree-fix-testing-mas_empty_area.patch
maple_tree-introduce-mas_next_slot-interface.patch
maple_tree-add-mas_next_range-and-mas_find_range-interfaces.patch
maple_tree-relocate-mas_rewalk-and-mas_rewalk_if_dead.patch
maple_tree-introduce-mas_prev_slot-interface.patch
maple_tree-add-mas_prev_range-and-mas_find_range_rev-interface.patch
maple_tree-clear-up-index-and-last-setting-in-single-entry-tree.patch
maple_tree-update-testing-code-for-mas_nextprevwalk.patch
mm-add-vma_iter_nextprev_range-to-vma-iterator.patch
mm-avoid-rewalk-in-mmap_region.patch
maple_tree-add-benchmarking-for-mas_for_each.patch
maple_tree-add-benchmarking-for-mas_prev.patch
mm-move-unmap_vmas-declaration-to-internal-header.patch
mm-change-do_vmi_align_munmap-side-tree-index.patch
mm-remove-prev-check-from-do_vmi_align_munmap.patch
maple_tree-introduce-__mas_set_range.patch
mm-remove-re-walk-from-mmap_region.patch
maple_tree-re-introduce-entry-to-mas_preallocate-arguments.patch
mm-use-vma_iter_clear_gfp-in-nommu.patch
mm-set-up-vma-iterator-for-vma_iter_prealloc-calls.patch
maple_tree-move-mas_wr_end_piv-below-mas_wr_extend_null.patch
maple_tree-update-mas_preallocate-testing.patch
maple_tree-refine-mas_preallocate-node-calculations.patch
mm-mmap-change-vma-iteration-order-in-do_vmi_align_munmap.patch
userfaultfd-fix-regression-in-userfaultfd_unmap_prep.patch