From: "Vlastimil Babka (SUSE)" <vbabka@kernel.org>
To: Harry Yoo <harry@kernel.org>
Cc: Hao Li <hao.li@linux.dev>, Christoph Lameter <cl@gentwo.org>,
David Rientjes <rientjes@google.com>,
Roman Gushchin <roman.gushchin@linux.dev>,
Suren Baghdasaryan <surenb@google.com>,
Alexei Starovoitov <ast@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Johannes Weiner <hannes@cmpxchg.org>,
Michal Hocko <mhocko@kernel.org>,
Shakeel Butt <shakeel.butt@linux.dev>,
Alexander Potapenko <glider@google.com>,
Marco Elver <elver@google.com>,
Dmitry Vyukov <dvyukov@google.com>,
kasan-dev@googlegroups.com, linux-mm@kvack.org,
linux-kernel@vger.kernel.org, cgroups@vger.kernel.org,
"Vlastimil Babka (SUSE)" <vbabka@kernel.org>
Subject: [PATCH RFC 02/15] mm/slab: stop inlining __slab_alloc_node()
Date: Tue, 09 Jun 2026 11:17:47 +0200 [thread overview]
Message-ID: <20260609-slab_alloc_flags-v1-2-2bf4a4b9b526@kernel.org> (raw)
In-Reply-To: <20260609-slab_alloc_flags-v1-0-2bf4a4b9b526@kernel.org>
With sheaves, this is no longer part of the allocation fastpath. For
the same reason, also mark the call to it from slab_alloc_node() as
unlikely().
Signed-off-by: Vlastimil Babka (SUSE) <vbabka@kernel.org>
---
mm/slub.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/mm/slub.c b/mm/slub.c
index f787dc422d1b..af85f338db4f 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -4519,8 +4519,8 @@ static void *___slab_alloc(struct kmem_cache *s, gfp_t gfpflags, int node,
return object;
}
-static __always_inline void *__slab_alloc_node(struct kmem_cache *s,
- gfp_t gfpflags, int node, unsigned long addr, size_t orig_size)
+static void *__slab_alloc_node(struct kmem_cache *s, gfp_t gfpflags, int node,
+ unsigned long addr, size_t orig_size)
{
void *object;
@@ -4907,7 +4907,7 @@ static __fastpath_inline void *slab_alloc_node(struct kmem_cache *s, struct list
object = alloc_from_pcs(s, gfpflags, node);
- if (!object)
+ if (unlikely(!object))
object = __slab_alloc_node(s, gfpflags, node, addr, orig_size);
maybe_wipe_obj_freeptr(s, object);
--
2.54.0
next prev parent reply other threads:[~2026-06-09 9:18 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-06-09 9:17 [PATCH RFC 00/15] mm/slab: introduce alloc_flags and slab_alloc_context Vlastimil Babka (SUSE)
2026-06-09 9:17 ` [PATCH RFC 01/15] mm/slab: always zero only requested size on alloc Vlastimil Babka (SUSE)
2026-06-09 9:17 ` Vlastimil Babka (SUSE) [this message]
2026-06-09 9:17 ` [PATCH RFC 03/15] mm/slab: introduce slab_alloc_context Vlastimil Babka (SUSE)
2026-06-09 9:17 ` [PATCH RFC 04/15] mm/slab: introduce alloc_flags and SLAB_ALLOC_TRYLOCK Vlastimil Babka (SUSE)
2026-06-09 9:17 ` [PATCH RFC 05/15] mm/slab: add alloc_flags to slab_alloc_context Vlastimil Babka (SUSE)
2026-06-09 9:17 ` [PATCH RFC 06/15] mm/slab: replace struct partial_context with slab_alloc_context Vlastimil Babka (SUSE)
2026-06-09 9:17 ` [PATCH RFC 07/15] mm/slab: pass alloc_flags to new slab allocation Vlastimil Babka (SUSE)
2026-06-09 9:17 ` [PATCH RFC 08/15] mm/slab: pass alloc_flags through slab_post_alloc_hook() chain Vlastimil Babka (SUSE)
2026-06-09 9:17 ` [PATCH RFC 09/15] mm/slab: replace slab_alloc_node() parameters with slab_alloc_context Vlastimil Babka (SUSE)
2026-06-09 9:17 ` [PATCH RFC 10/15] mm/slab: allow kmem_cache_alloc_bulk() with any gfp flags Vlastimil Babka (SUSE)
2026-06-09 9:17 ` [PATCH RFC 11/15] mm/slab: pass slab_alloc_context to __do_kmalloc_node() Vlastimil Babka (SUSE)
2026-06-09 9:17 ` [PATCH RFC 12/15] mm/slab: introduce kmalloc_flags() Vlastimil Babka (SUSE)
2026-06-09 9:17 ` [PATCH RFC 13/15] mm/slab: remove __GFP_NO_OBJ_EXT usage from alloc_slab_obj_exts() Vlastimil Babka (SUSE)
2026-06-09 9:17 ` [PATCH RFC 14/15] mm/slab: replace __GFP_NO_OBJ_EXT with SLAB_ALLOC_NO_RECURSE for sheaves Vlastimil Babka (SUSE)
2026-06-09 9:18 ` [PATCH RFC 15/15] mm: remove the __GFP_NO_OBJ_EXT flag Vlastimil Babka (SUSE)
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