[RFC,v2,07/34] mm, slub: extract get_partial() from new_slab_objects()

Commit Message

Vlastimil Babka June 9, 2021, 11:38 a.m. UTC

The later patches will need more fine grained control over individual actions
in ___slab_alloc(), the only caller of new_slab_objects(), so this is a first
preparatory step with no functional change.

This adds a goto label that appears unnecessary at this point, but will be
useful for later changes.

Signed-off-by: Vlastimil Babka <[e-mail]>
Acked-by: Christoph Lameter <[e-mail]>
---
 mm/slub.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

Patch

diff --git a/mm/slub.c b/mm/slub.c
index 76af5065baeb..38256e87dde8 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -2553,17 +2553,12 @@  slab_out_of_memory(struct kmem_cache *s, gfp_t gfpflags, int nid)
 static inline void *new_slab_objects(struct kmem_cache *s, gfp_t flags,
 			int node, struct kmem_cache_cpu **pc)
 {
-	void *freelist;
+	void *freelist = NULL;
 	struct kmem_cache_cpu *c = *pc;
 	struct page *page;
 
 	WARN_ON_ONCE(s->ctor && (flags & __GFP_ZERO));
 
-	freelist = get_partial(s, flags, node, c);
-
-	if (freelist)
-		return freelist;
-
 	page = new_slab(s, flags, node);
 	if (page) {
 		c = raw_cpu_ptr(s->cpu_slab);
@@ -2727,6 +2722,10 @@  static void *___slab_alloc(struct kmem_cache *s, gfp_t gfpflags, int node,
 		goto redo;
 	}
 
+	freelist = get_partial(s, gfpflags, node, c);
+	if (freelist)
+		goto check_new_page;
+
 	freelist = new_slab_objects(s, gfpflags, node, &c);
 
 	if (unlikely(!freelist)) {
@@ -2734,6 +2733,7 @@  static void *___slab_alloc(struct kmem_cache *s, gfp_t gfpflags, int node,
 		return NULL;
 	}
 
+check_new_page:
 	page = c->page;
 	if (likely(!kmem_cache_debug(s) && pfmemalloc_match(page, gfpflags)))
 		goto load_freelist;