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From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: linux-kernel@vger.kernel.org, linux-rt-users@vger.kernel.org,
Carsten Emde <C.Emde@osadl.org>, Christoph Lameter <cl@linux.com>,
Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Subject: [PATCH 11/16] slub: Use correct cpu_slab on dead cpu
Date: Wed, 13 Feb 2013 17:12:06 +0100
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From: Christoph Lameter <cl@linux.com>
Pass a kmem_cache_cpu pointer into unfreeze partials so that a different
kmem_cache_cpu structure than the local one can be specified.
Reported-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Christoph Lameter <cl@linux.com>
[bigeasy@linutronix: remove unused n2]
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
mm/slub.c | 14 +++++++++-----
1 file changed, 9 insertions(+), 5 deletions(-)
Index: linux-3.2.35-rt53/mm/slub.c
===================================================================
@ linux-3.2.35-rt53/mm/slub.c:1873 @ redo:
}
}
-/* Unfreeze all the cpu partial slabs */
-static void unfreeze_partials(struct kmem_cache *s)
+/*
+ * Unfreeze all the cpu partial slabs.
+ *
+ * This function must be called with interrupt disabled.
+ */
+static void unfreeze_partials(struct kmem_cache *s,
+ struct kmem_cache_cpu *c)
{
struct kmem_cache_node *n = NULL;
- struct kmem_cache_cpu *c = this_cpu_ptr(s->cpu_slab);
struct page *page, *discard_page = NULL;
while ((page = c->partial)) {
@ linux-3.2.35-rt53/mm/slub.c:1984 @ int put_cpu_partial(struct kmem_cache *s
* 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);
pobjects = 0;
pages = 0;
@ linux-3.2.35-rt53/mm/slub.c:2022 @ static inline void __flush_cpu_slab(stru
if (c->page)
flush_slab(s, c);
- unfreeze_partials(s);
+ unfreeze_partials(s, c);
}
}