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authorPekka Enberg <penberg@cs.helsinki.fi>2009-06-12 14:03:06 +0300
committerPekka Enberg <penberg@cs.helsinki.fi>2009-06-12 18:53:33 +0300
commit7e85ee0c1d15ca5f8bff0f514f158eba1742dd87 (patch)
tree8f9c21f0df6bea88740d7dd48834ac9ffc238e93 /include/linux
parenteb91f1d0a531289e18f5587dc197d12a251c66a3 (diff)
slab,slub: don't enable interrupts during early boot
As explained by Benjamin Herrenschmidt: Oh and btw, your patch alone doesn't fix powerpc, because it's missing a whole bunch of GFP_KERNEL's in the arch code... You would have to grep the entire kernel for things that check slab_is_available() and even then you'll be missing some. For example, slab_is_available() didn't always exist, and so in the early days on powerpc, we used a mem_init_done global that is set form mem_init() (not perfect but works in practice). And we still have code using that to do the test. Therefore, mask out __GFP_WAIT, __GFP_IO, and __GFP_FS in the slab allocators in early boot code to avoid enabling interrupts. Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/gfp.h3
-rw-r--r--include/linux/slab.h2
-rw-r--r--include/linux/slob_def.h5
-rw-r--r--include/linux/slub_def.h2
4 files changed, 12 insertions, 0 deletions
diff --git a/include/linux/gfp.h b/include/linux/gfp.h
index 0bbc15f5453..3760e7c5de0 100644
--- a/include/linux/gfp.h
+++ b/include/linux/gfp.h
@@ -85,6 +85,9 @@ struct vm_area_struct;
__GFP_NOWARN|__GFP_REPEAT|__GFP_NOFAIL|\
__GFP_NORETRY|__GFP_NOMEMALLOC)
+/* Control slab gfp mask during early boot */
+#define SLAB_GFP_BOOT_MASK __GFP_BITS_MASK & ~(__GFP_WAIT|__GFP_IO|__GFP_FS)
+
/* Control allocation constraints */
#define GFP_CONSTRAINT_MASK (__GFP_HARDWALL|__GFP_THISNODE)
diff --git a/include/linux/slab.h b/include/linux/slab.h
index 48803064ced..219b8fb4651 100644
--- a/include/linux/slab.h
+++ b/include/linux/slab.h
@@ -319,4 +319,6 @@ static inline void *kzalloc_node(size_t size, gfp_t flags, int node)
return kmalloc_node(size, flags | __GFP_ZERO, node);
}
+void __init kmem_cache_init_late(void);
+
#endif /* _LINUX_SLAB_H */
diff --git a/include/linux/slob_def.h b/include/linux/slob_def.h
index 0ec00b39d00..bb5368df4be 100644
--- a/include/linux/slob_def.h
+++ b/include/linux/slob_def.h
@@ -34,4 +34,9 @@ static __always_inline void *__kmalloc(size_t size, gfp_t flags)
return kmalloc(size, flags);
}
+static inline void kmem_cache_init_late(void)
+{
+ /* Nothing to do */
+}
+
#endif /* __LINUX_SLOB_DEF_H */
diff --git a/include/linux/slub_def.h b/include/linux/slub_def.h
index be5d40c43bd..4dcbc2c7149 100644
--- a/include/linux/slub_def.h
+++ b/include/linux/slub_def.h
@@ -302,4 +302,6 @@ static __always_inline void *kmalloc_node(size_t size, gfp_t flags, int node)
}
#endif
+void __init kmem_cache_init_late(void);
+
#endif /* _LINUX_SLUB_DEF_H */