From f6c786a95e950931b47cf23cd3ced6028be71d62 Mon Sep 17 00:00:00 2001 From: Johannes Weiner Date: Wed, 1 Jul 2026 14:21:02 -0400 Subject: [PATCH] mm: gfp_types: fix __GFP_ACCOUNT, GFP_KERNEL_ACCOUNT documentation 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. Link: https://lore.kernel.org/20260701182102.1586784-1-hannes@cmpxchg.org Signed-off-by: Johannes Weiner Reported-by: Gregory Price Reviewed-by: Vlastimil Babka (SUSE) Acked-by: Shakeel Butt Acked-by: Mike Rapoport (Microsoft) Reviewed-by: Gregory Price Acked-by: SJ Park Cc: David Hildenbrand Cc: Liam Howlett Cc: Lorenzo Stoakes Cc: Michal Hocko Cc: Muchun Song Cc: Roman Gushchin Cc: Suren Baghdasaryan Signed-off-by: Andrew Morton --- 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