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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 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



  parent reply	other threads:[~2026-06-09  9:18 UTC|newest]

Thread overview: 18+ 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)
2026-06-09 13:35 ` [PATCH RFC 00/15] mm/slab: introduce alloc_flags and slab_alloc_context Usama Arif
2026-06-09 14:28   ` Vlastimil Babka (SUSE)

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