On Thu, 5 Aug 2010, David Rientjes wrote:
> I bisected this to patch 8 but still don't have a bootlog. I'm assuming
> in the meantime that something is kmallocing DMA memory on this machine
> prior to kmem_cache_init_late() and get_slab() is returning a NULL
> pointer.
There is a kernel option "earlyprintk=..." that allows you to see early
boot messages.
If this indeed is a problem with the DMA caches then try the following
patch:
Subject: slub: Move dma cache initialization up
Do dma kmalloc initialization in kmem_cache_init and not in kmem_cache_init_late()
Signed-off-by: Christoph Lameter <cl@xxxxxxxxx>
---
mm/slub.c | 9 ++++-----
1 file changed, 4 insertions(+), 5 deletions(-)
Index: linux-2.6/mm/slub.c
===================================================================
--- linux-2.6.orig/mm/slub.c 2010-08-05 12:24:21.000000000 -0500
+++ linux-2.6/mm/slub.c 2010-08-05 12:28:58.000000000 -0500
@@ -3866,13 +3866,8 @@ void __init kmem_cache_init(void)
#ifdef CONFIG_SMP
register_cpu_notifier(&slab_notifier);
#endif
-}
-void __init kmem_cache_init_late(void)
-{
#ifdef CONFIG_ZONE_DMA
- int i;
-
/* Create the dma kmalloc array and make it operational */
for (i = 0; i < SLUB_PAGE_SHIFT; i++) {
struct kmem_cache *s = kmalloc_caches[i];
@@ -3891,6 +3886,10 @@ void __init kmem_cache_init_late(void)
#endif
}
+void __init kmem_cache_init_late(void)
+{
+}
+
/*
* Find a mergeable slab cache
*/
--
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