Messages in this thread Patch in this message | | | From | Eduard - Gabriel Munteanu <> | Subject | [RFC PATCH 3/4] kmemtrace: SLUB hooks. | Date | Thu, 17 Jul 2008 03:46:47 +0300 |
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This adds hooks for the SLUB allocator, to allow tracing with kmemtrace.
Signed-off-by: Eduard - Gabriel Munteanu <eduard.munteanu@linux360.ro> --- include/linux/slub_def.h | 9 +++++++- mm/slub.c | 47 ++++++++++++++++++++++++++++++++++++++++----- 2 files changed, 49 insertions(+), 7 deletions(-)
diff --git a/include/linux/slub_def.h b/include/linux/slub_def.h index d117ea2..0cef121 100644 --- a/include/linux/slub_def.h +++ b/include/linux/slub_def.h @@ -10,6 +10,7 @@ #include <linux/gfp.h> #include <linux/workqueue.h> #include <linux/kobject.h> +#include <linux/kmemtrace.h> enum stat_item { ALLOC_FASTPATH, /* Allocation from cpu slab */ @@ -205,7 +206,13 @@ void *__kmalloc(size_t size, gfp_t flags); static __always_inline void *kmalloc_large(size_t size, gfp_t flags) { - return (void *)__get_free_pages(flags | __GFP_COMP, get_order(size)); + unsigned int order = get_order(size); + void *ret = (void *) __get_free_pages(flags, order); + + kmemtrace_mark_alloc(KMEMTRACE_TYPE_KERNEL, _THIS_IP_, ret, + size, PAGE_SIZE << order, flags); + + return ret; } static __always_inline void *kmalloc(size_t size, gfp_t flags) diff --git a/mm/slub.c b/mm/slub.c index 315c392..a6f930f 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -23,6 +23,7 @@ #include <linux/kallsyms.h> #include <linux/memory.h> #include <linux/math64.h> +#include <linux/kmemtrace.h> /* * Lock order: @@ -1652,14 +1653,25 @@ static __always_inline void *slab_alloc(struct kmem_cache *s, void *kmem_cache_alloc(struct kmem_cache *s, gfp_t gfpflags) { - return slab_alloc(s, gfpflags, -1, __builtin_return_address(0)); + void *ret = slab_alloc(s, gfpflags, -1, __builtin_return_address(0)); + + kmemtrace_mark_alloc(KMEMTRACE_TYPE_CACHE, _RET_IP_, ret, + s->objsize, s->size, gfpflags); + + return ret; } EXPORT_SYMBOL(kmem_cache_alloc); #ifdef CONFIG_NUMA void *kmem_cache_alloc_node(struct kmem_cache *s, gfp_t gfpflags, int node) { - return slab_alloc(s, gfpflags, node, __builtin_return_address(0)); + void *ret = slab_alloc(s, gfpflags, node, + __builtin_return_address(0)); + + kmemtrace_mark_alloc_node(KMEMTRACE_TYPE_CACHE, _RET_IP_, ret, + s->objsize, s->size, gfpflags, node); + + return ret; } EXPORT_SYMBOL(kmem_cache_alloc_node); #endif @@ -1771,6 +1783,8 @@ void kmem_cache_free(struct kmem_cache *s, void *x) page = virt_to_head_page(x); slab_free(s, page, x, __builtin_return_address(0)); + + kmemtrace_mark_free(KMEMTRACE_TYPE_CACHE, _RET_IP_, x); } EXPORT_SYMBOL(kmem_cache_free); @@ -2676,6 +2690,7 @@ static struct kmem_cache *get_slab(size_t size, gfp_t flags) void *__kmalloc(size_t size, gfp_t flags) { struct kmem_cache *s; + void *ret; if (unlikely(size > PAGE_SIZE)) return kmalloc_large(size, flags); @@ -2685,7 +2700,12 @@ void *__kmalloc(size_t size, gfp_t flags) if (unlikely(ZERO_OR_NULL_PTR(s))) return s; - return slab_alloc(s, flags, -1, __builtin_return_address(0)); + ret = slab_alloc(s, flags, -1, __builtin_return_address(0)); + + kmemtrace_mark_alloc(KMEMTRACE_TYPE_KERNEL, _RET_IP_, ret, + size, (size_t) s->size, (unsigned long) flags); + + return ret; } EXPORT_SYMBOL(__kmalloc); @@ -2704,16 +2724,29 @@ static void *kmalloc_large_node(size_t size, gfp_t flags, int node) void *__kmalloc_node(size_t size, gfp_t flags, int node) { struct kmem_cache *s; + void *ret; - if (unlikely(size > PAGE_SIZE)) - return kmalloc_large_node(size, flags, node); + if (unlikely(size > PAGE_SIZE)) { + ret = kmalloc_large_node(size, flags, node); + + kmemtrace_mark_alloc_node(KMEMTRACE_TYPE_KERNEL, _RET_IP_, ret, + size, PAGE_SIZE << get_order(size), + (unsigned long) flags, node); + + return ret; + } s = get_slab(size, flags); if (unlikely(ZERO_OR_NULL_PTR(s))) return s; - return slab_alloc(s, flags, node, __builtin_return_address(0)); + ret = slab_alloc(s, flags, node, __builtin_return_address(0)); + + kmemtrace_mark_alloc_node(KMEMTRACE_TYPE_KERNEL, _RET_IP_, ret, + size, s->size, (unsigned long) flags, node); + + return ret; } EXPORT_SYMBOL(__kmalloc_node); #endif @@ -2771,6 +2804,8 @@ void kfree(const void *x) return; } slab_free(page->slab, page, object, __builtin_return_address(0)); + + kmemtrace_mark_free(KMEMTRACE_TYPE_KERNEL, _RET_IP_, x); } EXPORT_SYMBOL(kfree); -- 1.5.6.1
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