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authorUladzislau Rezki (Sony) <urezki@gmail.com>2024-02-02 22:06:28 +0300
committerAndrew Morton <akpm@linux-foundation.org>2024-02-24 04:48:20 +0300
commit96aa8437d169b8e030a98e2b74fd9a8ee9d3be7e (patch)
tree560f9cbbf606cab4b4f28f1523abdb4782afd649 /mm/vmalloc.c
parent72210662c5a2b6005f6daea7fe293a0dc573e1a5 (diff)
downloadlinux-96aa8437d169b8e030a98e2b74fd9a8ee9d3be7e.tar.xz
mm: vmalloc: add a scan area of VA only once
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@gmail.com Fixes: 7db166b4aa0d ("mm: vmalloc: offload free_vmap_area_lock lock") Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com> Reviewed-by: Lorenzo Stoakes <lstoakes@gmail.com> Cc: Baoquan He <bhe@redhat.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Dave Chinner <david@fromorbit.com> Cc: Joel Fernandes (Google) <joel@joelfernandes.org> Cc: Kazuhito Hagio <k-hagio-ab@nec.com> Cc: Liam R. Howlett <Liam.Howlett@oracle.com> Cc: Matthew Wilcox (Oracle) <willy@infradead.org> Cc: Oleksiy Avramchenko <oleksiy.avramchenko@sony.com> Cc: Paul E. McKenney <paulmck@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/vmalloc.c')
-rw-r--r--mm/vmalloc.c12
1 files changed, 6 insertions, 6 deletions
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index e8b9621ea02b..75e96cf377ef 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -1834,13 +1834,13 @@ static struct vmap_area *alloc_vmap_area(unsigned long size,
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) {