The patch titled
Subject: mm: vmalloc: add a scan area of VA only once
has been added to the -mm mm-unstable branch. Its filename is
mm-vmalloc-offload-free_vmap_area_lock-lock-fix.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-vmalloc-offload-free_vmap_area_lock-lock-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: "Uladzislau Rezki (Sony)" <urezki@xxxxxxxxx>
Subject: mm: vmalloc: add a scan area of VA only once
Date: Fri, 2 Feb 2024 20:06:28 +0100
Invoke a kmemleak_scan_area() function only for newly allocated objects to
add a scan area within that object. There is no reason to add a same scan
area(pointer to beginning or inside the object) several times. If a VA is
obtained from the cache its scan area has already been associated.
Link: https://lkml.kernel.org/r/20240202190628.47806-1-urezki@xxxxxxxxx
Fixes: 7db166b4aa0d ("mm: vmalloc: offload free_vmap_area_lock lock")
Signed-off-by: Uladzislau Rezki (Sony) <urezki@xxxxxxxxx>
Cc: Baoquan He <bhe@xxxxxxxxxx>
Cc: Christoph Hellwig <hch@xxxxxx>
Cc: Dave Chinner <david@xxxxxxxxxxxxx>
Cc: Joel Fernandes (Google) <joel@xxxxxxxxxxxxxxxxx>
Cc: Kazuhito Hagio <k-hagio-ab@xxxxxxx>
Cc: Liam R. Howlett <Liam.Howlett@xxxxxxxxxx>
Cc: Lorenzo Stoakes <lstoakes@xxxxxxxxx>
Cc: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Cc: Oleksiy Avramchenko <oleksiy.avramchenko@xxxxxxxx>
Cc: Paul E. McKenney <paulmck@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/vmalloc.c | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)
--- a/mm/vmalloc.c~mm-vmalloc-offload-free_vmap_area_lock-lock-fix
+++ a/mm/vmalloc.c
@@ -1834,13 +1834,13 @@ static struct vmap_area *alloc_vmap_area
va = kmem_cache_alloc_node(vmap_area_cachep, gfp_mask, node);
if (unlikely(!va))
return ERR_PTR(-ENOMEM);
- }
- /*
- * Only scan the relevant parts containing pointers to other objects
- * to avoid false negatives.
- */
- kmemleak_scan_area(&va->rb_node, SIZE_MAX, gfp_mask);
+ /*
+ * Only scan the relevant parts containing pointers to other objects
+ * to avoid false negatives.
+ */
+ kmemleak_scan_area(&va->rb_node, SIZE_MAX, gfp_mask);
+ }
retry:
if (addr == vend) {
_
Patches currently in -mm which might be from urezki@xxxxxxxxx are
mm-vmalloc-add-va_alloc-helper.patch
mm-vmalloc-rename-adjust_va_to_fit_type-function.patch
mm-vmalloc-move-vmap_init_free_space-down-in-vmallocc.patch
mm-vmalloc-remove-global-vmap_area_root-rb-tree.patch
mm-vmalloc-remove-global-vmap_area_root-rb-tree-fix.patch
mm-vmalloc-remove-global-vmap_area_root-rb-tree-fix-2.patch
mm-vmalloc-remove-vmap_area_list-fix.patch
mm-vmalloc-remove-global-purge_vmap_area_root-rb-tree.patch
mm-vmalloc-offload-free_vmap_area_lock-lock.patch
mm-vmalloc-offload-free_vmap_area_lock-lock-fix.patch
mm-vmalloc-support-multiple-nodes-in-vread_iter.patch
mm-vmalloc-support-multiple-nodes-in-vmallocinfo.patch
mm-vmalloc-set-nr_nodes-based-on-cpus-in-a-system.patch
mm-vmalloc-add-a-shrinker-to-drain-vmap-pools.patch
mm-vmalloc-improve-description-of-vmap-node-layer.patch
mm-vmalloc-refactor-vmalloc_dump_obj-function.patch
