Stephen Rothwell wrote:
4) The slab[7] tree adds a percpu variable usage case (commit 9dfc6e68bfe6ee452efb1a4e9ca26a9007f2b864 "SLUB: Use this_cpu operations in slub"), but the percpu[8] tree removes the prefixing of percpu variables (commit dd17c8f72993f9461e9c19250e3f155d6d99df22 "percpu: remove per_cpu__ prefix"), thus the fooling patch after mergeing these trees: diff --git a/mm/slub.c b/mm/slub.c index 6e34309..9e86e6b 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -2071,7 +2071,7 @@ static inline int alloc_kmem_cache_cpus(struct kmem_cache *s, gfp_t flags) * Boot time creation of the kmalloc array. Use static per cpu data * since the per cpu allocator is not available yet. */ - s->cpu_slab = per_cpu_var(kmalloc_percpu) + (s - kmalloc_caches); + s->cpu_slab = kmalloc_percpu + (s - kmalloc_caches); else s->cpu_slab = alloc_percpu(struct kmem_cache_cpu);
Thanks for the reminder Stephen! I'll add this to slab.git as soon as the per-cpu changes land into Linus' tree.
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