From: Johannes Weiner <hannes@cmpxchg.org>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Gregory Price <gourry@gourry.net>,
Michal Hocko <mhocko@kernel.org>,
Roman Gushchin <roman.gushchin@linux.dev>,
Shakeel Butt <shakeel.butt@linux.dev>,
Muchun Song <muchun.song@linux.dev>,
David Hildenbrand <david@kernel.org>,
Lorenzo Stoakes <ljs@kernel.org>,
"Liam R. Howlett" <Liam.Howlett@oracle.com>,
Vlastimil Babka <vbabka@suse.cz>, Mike Rapoport <rppt@kernel.org>,
Suren Baghdasaryan <surenb@google.com>,
cgroups@vger.kernel.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org
Subject: [PATCH] mm: gfp_types: fix __GFP_ACCOUNT, GFP_KERNEL_ACCOUNT documentation
Date: Wed, 1 Jul 2026 14:21:02 -0400 [thread overview]
Message-ID: <20260701182102.1586784-1-hannes@cmpxchg.org> (raw)
Gregory points out that these descriptions are cursed and confusing,
considering what these flags actually do. This is mostly due to
historic implementation choices and cgroup1 baggage. Improve the
description of their actual effects.
Reported-by: Gregory Price <gourry@gourry.net>
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
---
include/linux/gfp_types.h | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/include/linux/gfp_types.h b/include/linux/gfp_types.h
index 54ca0c88bab6..463b551d12d9 100644
--- a/include/linux/gfp_types.h
+++ b/include/linux/gfp_types.h
@@ -136,7 +136,8 @@ enum {
* %__GFP_THISNODE forces the allocation to be satisfied from the requested
* node with no fallbacks or placement policy enforcements.
*
- * %__GFP_ACCOUNT causes the allocation to be accounted to kmemcg.
+ * %__GFP_ACCOUNT causes the allocation to be accounted to the active
+ * cgroup context.
*
* %__GFP_NO_OBJ_EXT causes slab allocation to have no object extension.
* mark_obj_codetag_empty() should be called upon freeing for objects allocated
@@ -320,7 +321,7 @@ enum {
* %ZONE_NORMAL or a lower zone for direct access but can direct reclaim.
*
* %GFP_KERNEL_ACCOUNT is the same as GFP_KERNEL, except the allocation is
- * accounted to kmemcg.
+ * accounted to the active cgroup context.
*
* %GFP_NOWAIT is for kernel allocations that should not stall for direct
* reclaim, start physical IO or use any filesystem callback. It is very
--
2.55.0
next reply other threads:[~2026-07-01 18:21 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-01 18:21 Johannes Weiner [this message]
2026-07-01 18:27 ` [PATCH] mm: gfp_types: fix __GFP_ACCOUNT, GFP_KERNEL_ACCOUNT documentation Vlastimil Babka (SUSE)
2026-07-01 18:37 ` Shakeel Butt
2026-07-01 20:10 ` Mike Rapoport
2026-07-01 22:23 ` Gregory Price
2026-07-01 23:40 ` SJ Park
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