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slub: Use page variable instead of c->page.
Store the value of c->page to avoid additional fetches from per cpu data. Acked-by: David Rientjes <rientjes@google.com> Signed-off-by: Christoph Lameter <cl@linux.com> Signed-off-by: Pekka Enberg <penberg@kernel.org>
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parent
c17dda40a6
commit
f6e7def7f7
17
mm/slub.c
17
mm/slub.c
@ -2208,6 +2208,7 @@ static void *__slab_alloc(struct kmem_cache *s, gfp_t gfpflags, int node,
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unsigned long addr, struct kmem_cache_cpu *c)
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{
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void *freelist;
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struct page *page;
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unsigned long flags;
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local_irq_save(flags);
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@ -2220,13 +2221,14 @@ static void *__slab_alloc(struct kmem_cache *s, gfp_t gfpflags, int node,
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c = this_cpu_ptr(s->cpu_slab);
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#endif
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if (!c->page)
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page = c->page;
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if (!page)
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goto new_slab;
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redo:
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if (unlikely(!node_match(c, node))) {
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stat(s, ALLOC_NODE_MISMATCH);
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deactivate_slab(s, c->page, c->freelist);
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deactivate_slab(s, page, c->freelist);
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c->page = NULL;
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c->freelist = NULL;
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goto new_slab;
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@ -2239,7 +2241,7 @@ redo:
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stat(s, ALLOC_SLOWPATH);
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freelist = get_freelist(s, c->page);
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freelist = get_freelist(s, page);
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if (!freelist) {
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c->page = NULL;
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@ -2264,8 +2266,8 @@ load_freelist:
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new_slab:
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if (c->partial) {
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c->page = c->partial;
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c->partial = c->page->next;
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page = c->page = c->partial;
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c->partial = page->next;
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stat(s, CPU_PARTIAL_ALLOC);
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c->freelist = NULL;
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goto redo;
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@ -2281,14 +2283,15 @@ new_slab:
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return NULL;
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}
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page = c->page;
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if (likely(!kmem_cache_debug(s)))
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goto load_freelist;
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/* Only entered in the debug case */
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if (!alloc_debug_processing(s, c->page, freelist, addr))
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if (!alloc_debug_processing(s, page, freelist, addr))
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goto new_slab; /* Slab failed checks. Next slab needed */
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deactivate_slab(s, c->page, get_freepointer(s, freelist));
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deactivate_slab(s, page, get_freepointer(s, freelist));
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c->page = NULL;
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c->freelist = NULL;
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local_irq_restore(flags);
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