+ mm-vmalloc-extract-show_busy_info-from-vmalloc_info_show.patch added to mm-new branch

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

The patch titled
     Subject: mm/vmalloc: extract show_busy_info from vmalloc_info_show
has been added to the -mm mm-new branch.  Its filename is
     mm-vmalloc-extract-show_busy_info-from-vmalloc_info_show.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-vmalloc-extract-show_busy_info-from-vmalloc_info_show.patch

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

Note, mm-new is a provisional staging ground for work-in-progress
patches, and acceptance into mm-new is a notification for others take
notice and to finish up reviews.  Please do not hesitate to respond to
review feedback and post updated versions to replace or incrementally
fixup patches in mm-new.

The mm-new branch of mm.git is not included in linux-next

If a few days of testing in mm-new is successful, the patch will me moved
into mm.git's mm-unstable branch, which is included in linux-next

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------------------------------------------------------
From: Ye Liu <liuye@kylinos.cn>
Subject: mm/vmalloc: extract show_busy_info from vmalloc_info_show
Date: Tue, 15 Sep 2026 10:43:32 +0800

Extract the busy vmap area iteration into show_busy_info, mirroring
the existing show_purge_info pattern.

Link: https://lore.kernel.org/20260915-vmalloc_study-v2-3-cc4dfe635e22@linux.dev
Signed-off-by: Ye Liu <liuye@kylinos.cn>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
---

 mm/vmalloc.c |   12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

--- a/mm/vmalloc.c~mm-vmalloc-extract-show_busy_info-from-vmalloc_info_show
+++ a/mm/vmalloc.c
@@ -5345,7 +5345,7 @@ static void show_purge_info(struct seq_f
 	}
 }
 
-static int vmalloc_info_show(struct seq_file *m, void *p)
+static void show_busy_info(struct seq_file *m)
 {
 	struct vmap_node *vn;
 	struct vmap_area *va;
@@ -5415,12 +5415,18 @@ static int vmalloc_info_show(struct seq_
 		spin_unlock(&vn->busy.lock);
 	}
 
+	if (IS_ENABLED(CONFIG_NUMA))
+		kfree(counters);
+}
+
+static int vmalloc_info_show(struct seq_file *m, void *p)
+{
+	show_busy_info(m);
+
 	/*
 	 * As a final step, dump "unpurged" areas.
 	 */
 	show_purge_info(m);
-	if (IS_ENABLED(CONFIG_NUMA))
-		kfree(counters);
 	return 0;
 }
 
_

Patches currently in -mm which might be from liuye@kylinos.cn are

mm-vmalloc-fix-vmap_purge_lock-livelock-under-memory-pressure.patch
tools-mm-page_owner_sort-fix-sort-option-being-silently-ignored.patch
tools-mm-page_owner_sort-add-module-name-sort-cull-filter-support.patch
tools-mm-page_owner_sort-show-available-sort-keys-in-usage-text.patch
mm-oom_kill-remove-unreachable-__gfp_thisnode-check-in-constrained_alloc.patch
mm-oom_kill-proc-replace-magic-number-1000-with-oom_score_adj_max.patch
mm-page_table_check-add-explicit-pmd_none-check-in-pte_clear_range.patch
mm-vmalloc-group-xa_init-with-vbq-field-initializations.patch
mm-vmalloc-extract-vmap_insert_free_area-helper.patch
mm-vmalloc-extract-show_busy_info-from-vmalloc_info_show.patch