+ mm-update-vma_iter_store-to-use-mas_warn_on.patch added to mm-unstable branch

[Andrew Morton <akpm@linux-foundation.org>]

The patch titled
     Subject: mm: update vma_iter_store() to use MAS_WARN_ON()
has been added to the -mm mm-unstable branch.  Its filename is
     mm-update-vma_iter_store-to-use-mas_warn_on.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-update-vma_iter_store-to-use-mas_warn_on.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 vma_iter_store() to use MAS_WARN_ON()
Date: Fri, 5 May 2023 13:41:46 -0400

MAS_WARN_ON() will provide more information on the maple state and can be
more useful for debugging.  Use this version of WARN_ON() in the debugging
code when storing to the tree.

Update the printk to a pr_warn(), but this will only be printed when maple
tree debug is enabled anyways.

Making all print statements into one will keep them together on a busy
terminal.

Link: https://lkml.kernel.org/r/20230505174204.2665599-19-Liam.Howlett@oracle.com
Cc: Sergey Senozhatsky <senozhatsky@chromium.org>
Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: David Binderman <dcb314@hotmail.com>
Cc: Peng Zhang <zhangpeng.00@bytedance.com>
Cc: Wei Yang <richard.weiyang@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/internal.h |   27 ++++++++++++++++-----------
 1 file changed, 16 insertions(+), 11 deletions(-)

--- a/mm/internal.h~mm-update-vma_iter_store-to-use-mas_warn_on
+++ a/mm/internal.h
@@ -1047,18 +1047,23 @@ static inline void vma_iter_store(struct
 {
 
 #if defined(CONFIG_DEBUG_VM_MAPLE_TREE)
-	if (WARN_ON(vmi->mas.node != MAS_START && vmi->mas.index > vma->vm_start)) {
-		printk("%lu > %lu\n", vmi->mas.index, vma->vm_start);
-		printk("store of vma %lu-%lu", vma->vm_start, vma->vm_end);
-		printk("into slot    %lu-%lu", vmi->mas.index, vmi->mas.last);
-		vma_iter_dump_tree(vmi);
+	if (MAS_WARN_ON(&vmi->mas, vmi->mas.node != MAS_START &&
+			vmi->mas.index > vma->vm_start)) {
+		pr_warn("%lx > %lx\n"
+		       "store of vma %lx-%lx\n"
+		       "into slot    %lx-%lx\n",
+		       vmi->mas.index, vma->vm_start,
+		       vma->vm_start, vma->vm_end,
+		       vmi->mas.index, vmi->mas.last);
 	}
-	if (WARN_ON(vmi->mas.node != MAS_START && vmi->mas.last <  vma->vm_start)) {
-		printk("%lu < %lu\n", vmi->mas.last, vma->vm_start);
-		printk("store of vma %lu-%lu", vma->vm_start, vma->vm_end);
-		printk("into slot    %lu-%lu", vmi->mas.index, vmi->mas.last);
-		mt_dump(vmi->mas.tree, mt_dump_hex);
-		vma_iter_dump_tree(vmi);
+	if (MAS_WARN_ON(&vmi->mas, vmi->mas.node != MAS_START &&
+			vmi->mas.last <  vma->vm_start)) {
+		pr_warn("%lx < %lx\n"
+		       "store of vma %lx-%lx\n"
+		       "into slot    %lx-%lx\n",
+		       vmi->mas.last, vma->vm_start,
+		       vma->vm_start, vma->vm_end,
+		       vmi->mas.index, vmi->mas.last);
 	}
 #endif
 
_

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-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-gap-to-check_alloc_rev_range-testcase.patch