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[PATCH] leak tracking for kmalloc_node

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We have variants of kmalloc and kmem_cache_alloc that leave leak tracking to
the caller.  This is used for subsystem-specific allocators like skb_alloc.

To make skb_alloc node-aware we need similar routines for the node-aware slab
allocator, which this patch adds.

Note that the code is rather ugly, but it mirrors the non-node-aware code 1:1:

[akpm@osdl.org: add module export]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Christoph Hellwig
2006-12-06 20:32:30 -08:00
committed by Linus Torvalds
parent 881e4aabe4
commit 8b98c1699e
2 changed files with 65 additions and 13 deletions
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23
include/linux/slab.h
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@ -236,7 +236,25 @@ found:
}
return __kmalloc_node(size, flags, node);
}
/*
* kmalloc_node_track_caller is a special version of kmalloc_node that
* records the calling function of the routine calling it for slab leak
* tracking instead of just the calling function (confusing, eh?).
* It's useful when the call to kmalloc_node comes from a widely-used
* standard allocator where we care about the real place the memory
* allocation request comes from.
*/
#ifndef CONFIG_DEBUG_SLAB
#define kmalloc_node_track_caller(size, flags, node) \
__kmalloc_node(size, flags, node)
#else
extern void *__kmalloc_node_track_caller(size_t, gfp_t, int, void *);
#define kmalloc_node_track_caller(size, flags, node) \
__kmalloc_node_track_caller(size, flags, node, \
__builtin_return_address(0))
#endif
#else /* CONFIG_NUMA */
static inline void *kmem_cache_alloc_node(kmem_cache_t *cachep, gfp_t flags, int node)
{
return kmem_cache_alloc(cachep, flags);
@ -245,6 +263,9 @@ static inline void *kmalloc_node(size_t size, gfp_t flags, int node)
{
return kmalloc(size, flags);
}
#define kmalloc_node_track_caller(size, flags, node) \
kmalloc_track_caller(size, flags)
#endif
extern int FASTCALL(kmem_cache_reap(int));
@ -283,6 +304,8 @@ static inline void *kcalloc(size_t n, size_t size, gfp_t flags)
#define kzalloc(s, f) __kzalloc(s, f)
#define kmalloc_track_caller kmalloc
#define kmalloc_node_track_caller kmalloc_node
#endif /* CONFIG_SLOB */
/* System wide caches */