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authorPekka Enberg <penberg@cs.helsinki.fi>2009-06-12 15:58:59 +0300
committerPekka Enberg <penberg@cs.helsinki.fi>2009-06-12 18:53:58 +0300
commit8429db5c6336083594036c30f49401405d536911 (patch)
tree00ab1aa8e222f384bac0e66b7da195279b1c7698
parent7e85ee0c1d15ca5f8bff0f514f158eba1742dd87 (diff)
slab: setup cpu caches later on when interrupts are enabled
Fixes the following boot-time warning: [ 0.000000] ------------[ cut here ]------------ [ 0.000000] WARNING: at kernel/smp.c:369 smp_call_function_many+0x56/0x1bc() [ 0.000000] Hardware name: [ 0.000000] Modules linked in: [ 0.000000] Pid: 0, comm: swapper Not tainted 2.6.30 #492 [ 0.000000] Call Trace: [ 0.000000] [<ffffffff8149e021>] ? _spin_unlock+0x4f/0x5c [ 0.000000] [<ffffffff8108f11b>] ? smp_call_function_many+0x56/0x1bc [ 0.000000] [<ffffffff81061764>] warn_slowpath_common+0x7c/0xa9 [ 0.000000] [<ffffffff810617a5>] warn_slowpath_null+0x14/0x16 [ 0.000000] [<ffffffff8108f11b>] smp_call_function_many+0x56/0x1bc [ 0.000000] [<ffffffff810f3e00>] ? do_ccupdate_local+0x0/0x54 [ 0.000000] [<ffffffff810f3e00>] ? do_ccupdate_local+0x0/0x54 [ 0.000000] [<ffffffff8108f2be>] smp_call_function+0x3d/0x68 [ 0.000000] [<ffffffff810f3e00>] ? do_ccupdate_local+0x0/0x54 [ 0.000000] [<ffffffff81066fd8>] on_each_cpu+0x31/0x7c [ 0.000000] [<ffffffff810f64f5>] do_tune_cpucache+0x119/0x454 [ 0.000000] [<ffffffff81087080>] ? lockdep_init_map+0x94/0x10b [ 0.000000] [<ffffffff818133b0>] ? kmem_cache_init+0x421/0x593 [ 0.000000] [<ffffffff810f69cf>] enable_cpucache+0x68/0xad [ 0.000000] [<ffffffff818133c3>] kmem_cache_init+0x434/0x593 [ 0.000000] [<ffffffff8180987c>] ? mem_init+0x156/0x161 [ 0.000000] [<ffffffff817f8aae>] start_kernel+0x1cc/0x3b9 [ 0.000000] [<ffffffff817f829a>] x86_64_start_reservations+0xaa/0xae [ 0.000000] [<ffffffff817f837f>] x86_64_start_kernel+0xe1/0xe8 [ 0.000000] ---[ end trace 4eaa2a86a8e2da22 ]--- Cc: Christoph Lameter <cl@linux-foundation.org> Cc: Nick Piggin <npiggin@suse.de> Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
-rw-r--r--mm/slab.c37
1 files changed, 19 insertions, 18 deletions
diff --git a/mm/slab.c b/mm/slab.c
index 453efcb1c98..18e3164de09 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -759,6 +759,7 @@ static enum {
NONE,
PARTIAL_AC,
PARTIAL_L3,
+ EARLY,
FULL
} g_cpucache_up;
@@ -767,7 +768,7 @@ static enum {
*/
int slab_is_available(void)
{
- return g_cpucache_up == FULL;
+ return g_cpucache_up >= EARLY;
}
static DEFINE_PER_CPU(struct delayed_work, reap_work);
@@ -1631,19 +1632,27 @@ void __init kmem_cache_init(void)
}
}
- /* 6) resize the head arrays to their final sizes */
- {
- struct kmem_cache *cachep;
- mutex_lock(&cache_chain_mutex);
- list_for_each_entry(cachep, &cache_chain, next)
- if (enable_cpucache(cachep, GFP_NOWAIT))
- BUG();
- mutex_unlock(&cache_chain_mutex);
- }
+ g_cpucache_up = EARLY;
/* Annotate slab for lockdep -- annotate the malloc caches */
init_lock_keys();
+}
+
+void __init kmem_cache_init_late(void)
+{
+ struct kmem_cache *cachep;
+
+ /*
+ * Interrupts are enabled now so all GFP allocations are safe.
+ */
+ slab_gfp_mask = __GFP_BITS_MASK;
+ /* 6) resize the head arrays to their final sizes */
+ mutex_lock(&cache_chain_mutex);
+ list_for_each_entry(cachep, &cache_chain, next)
+ if (enable_cpucache(cachep, GFP_NOWAIT))
+ BUG();
+ mutex_unlock(&cache_chain_mutex);
/* Done! */
g_cpucache_up = FULL;
@@ -1660,14 +1669,6 @@ void __init kmem_cache_init(void)
*/
}
-void __init kmem_cache_init_late(void)
-{
- /*
- * Interrupts are enabled now so all GFP allocations are safe.
- */
- slab_gfp_mask = __GFP_BITS_MASK;
-}
-
static int __init cpucache_init(void)
{
int cpu;