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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 v2 03/16] mm/slab: stop inlining __slab_alloc_node()
Date: Wed, 10 Jun 2026 17:40:05 +0200	[thread overview]
Message-ID: <20260610-slab_alloc_flags-v2-3-7190909db118@kernel.org> (raw)
In-Reply-To: <20260610-slab_alloc_flags-v2-0-7190909db118@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().

Reviewed-by: Harry Yoo (Oracle) <harry@kernel.org>
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 8e5264d3ddbf..7b48c0d38404 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;
 
@@ -4923,7 +4923,7 @@ 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


  parent reply	other threads:[~2026-06-10 15:40 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-06-10 15:40 [PATCH v2 00/16] mm/slab: introduce alloc_flags and slab_alloc_context Vlastimil Babka (SUSE)
2026-06-10 15:40 ` [PATCH v2 01/16] mm/slab: do not limit zeroing to orig_size when only red zoning is enabled Vlastimil Babka (SUSE)
2026-06-10 15:40 ` [PATCH v2 02/16] mm/slab: do not init any kfence objects on allocation Vlastimil Babka (SUSE)
2026-06-10 15:40 ` Vlastimil Babka (SUSE) [this message]
2026-06-10 15:40 ` [PATCH v2 04/16] mm/slab: introduce slab_alloc_context Vlastimil Babka (SUSE)
2026-06-10 15:40 ` [PATCH v2 05/16] mm/slab: introduce alloc_flags and SLAB_ALLOC_TRYLOCK Vlastimil Babka (SUSE)
2026-06-10 15:40 ` [PATCH v2 06/16] mm/slab: add alloc_flags to slab_alloc_context Vlastimil Babka (SUSE)
2026-06-10 15:40 ` [PATCH v2 07/16] mm/slab: replace struct partial_context with slab_alloc_context Vlastimil Babka (SUSE)
2026-06-10 15:40 ` [PATCH v2 08/16] mm/slab: pass alloc_flags to new slab allocation Vlastimil Babka (SUSE)
2026-06-10 15:40 ` [PATCH v2 09/16] mm/slab: pass alloc_flags through slab_post_alloc_hook() chain Vlastimil Babka (SUSE)
2026-06-10 15:40 ` [PATCH v2 10/16] mm/slab: replace slab_alloc_node() parameters with slab_alloc_context Vlastimil Babka (SUSE)
2026-06-10 15:40 ` [PATCH v2 11/16] mm/slab: allow kmem_cache_alloc_bulk() with any gfp flags Vlastimil Babka (SUSE)
2026-06-10 15:40 ` [PATCH v2 12/16] mm/slab: pass slab_alloc_context to __do_kmalloc_node() Vlastimil Babka (SUSE)
2026-06-10 15:40 ` [PATCH v2 13/16] mm/slab: allow __GFP_NOMEMALLOC and __GFP_NOWARN for kmalloc_nolock() Vlastimil Babka (SUSE)
2026-06-10 15:40 ` [PATCH v2 14/16] mm/slab: introduce kmalloc_flags() Vlastimil Babka (SUSE)
2026-06-10 15:40 ` [PATCH v2 15/16] mm/slab: remove __GFP_NO_OBJ_EXT usage from alloc_slab_obj_exts() Vlastimil Babka (SUSE)
2026-06-10 15:40 ` [PATCH v2 16/16] mm/slab: replace __GFP_NO_OBJ_EXT with SLAB_ALLOC_NO_RECURSE for sheaves Vlastimil Babka (SUSE)

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