From: Christoph Lameter Date: Wed, 28 Nov 2012 16:23:00 +0000 (+0000) Subject: slub: Use correct cpu_slab on dead cpu X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=59a09917c95e5209135b4f1a87f1263d6ef40fdb;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git slub: Use correct cpu_slab on dead cpu Pass a kmem_cache_cpu pointer into unfreeze partials so that a different kmem_cache_cpu structure than the local one can be specified. Acked-by: David Rientjes Signed-off-by: Christoph Lameter Signed-off-by: Pekka Enberg --- diff --git a/mm/slub.c b/mm/slub.c index b2ada3db4225..33576b0cfc41 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -1869,12 +1869,14 @@ redo: /* * Unfreeze all the cpu partial slabs. * - * This function must be called with interrupt disabled. + * This function must be called with interrupts disabled + * for the cpu using c (or some other guarantee must be there + * to guarantee no concurrent accesses). */ -static void unfreeze_partials(struct kmem_cache *s) +static void unfreeze_partials(struct kmem_cache *s, + struct kmem_cache_cpu *c) { struct kmem_cache_node *n = NULL, *n2 = NULL; - struct kmem_cache_cpu *c = this_cpu_ptr(s->cpu_slab); struct page *page, *discard_page = NULL; while ((page = c->partial)) { @@ -1960,7 +1962,7 @@ static int put_cpu_partial(struct kmem_cache *s, struct page *page, int drain) * set to the per node partial list. */ local_irq_save(flags); - unfreeze_partials(s); + unfreeze_partials(s, this_cpu_ptr(s->cpu_slab)); local_irq_restore(flags); oldpage = NULL; pobjects = 0; @@ -2003,7 +2005,7 @@ static inline void __flush_cpu_slab(struct kmem_cache *s, int cpu) if (c->page) flush_slab(s, c); - unfreeze_partials(s); + unfreeze_partials(s, c); } }