memcg-fix-slab-accounting-in-refill_obj_stock-trylock-path.patch removed from -mm tree

The quilt patch titled
Subject: memcg: fix slab accounting in refill_obj_stock() trylock path
has been removed from the -mm tree. Its filename was
memcg-fix-slab-accounting-in-refill_obj_stock-trylock-path.patch

This patch was dropped because it was merged into the mm-hotfixes-stable branch of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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From: Hao Li <[email protected]>
Subject: memcg: fix slab accounting in refill_obj_stock() trylock path
Date: Thu, 26 Feb 2026 19:51:37 +0800

In the trylock path of refill_obj_stock(), mod_objcg_mlstate() should use the real alloc/free bytes (i.e., nr_acct) for accounting, rather than nr_bytes.

The user-visible impact is that the NR_SLAB_RECLAIMABLE_B and NR_SLAB_UNRECLAIMABLE_B stats can end up being incorrect.

For example, if a user allocates a 6144-byte object, then before this fix efill_obj_stock() calls mod_objcg_mlstate(..., nr_bytes=2048), even though it should account for 6144 bytes (i.e., nr_acct).

When the user later frees the same object with kfree(), refill_obj_stock() calls mod_objcg_mlstate(..., nr_bytes=6144). This ends up adding 6144 to the stats, but it should be applying -6144 (i.e., nr_acct) since the object is being freed.

---

 mm/memcontrol.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

@@ -3086,7 +3086,7 @@ static void refill_obj_stock(struct obj_
 
 	if (!local_trylock(&obj_stock.lock)) {
 		if (pgdat)
-			mod_objcg_mlstate(objcg, pgdat, idx, nr_bytes);
+			mod_objcg_mlstate(objcg, pgdat, idx, nr_acct);
 		nr_pages = nr_bytes >> PAGE_SHIFT;
 		nr_bytes = nr_bytes & (PAGE_SIZE - 1);
 		atomic_add(nr_bytes, &objcg->nr_charged_bytes);

_

Patches currently in -mm which might be from [email protected] are