Messages in this thread | | | Date | Fri, 11 Dec 2009 08:00:45 +0200 | From | Pekka Enberg <> | Subject | Re: [PATCH 2/2] tracing: Fix no callsite ifndef CONFIG_KMEMTRACE |
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Li Zefan wrote: > For slab, if CONFIG_KMEMTRACE and CONFIG_DEBUG_SLAB are not set, > __do_kmalloc() will not track callers: > > # ./perf record -f -a -R -e kmem:kmalloc > ^C > # ./perf trace > ... > perf-2204 [000] 147.376774: kmalloc: call_site=c0529d2d ... > perf-2204 [000] 147.400997: kmalloc: call_site=c0529d2d ... > Xorg-1461 [001] 147.405413: kmalloc: call_site=0 ... > Xorg-1461 [001] 147.405609: kmalloc: call_site=0 ... > konsole-1776 [001] 147.405786: kmalloc: call_site=0 ... > > Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Reviewed-by: Pekka Enberg <penberg@cs.helsinki.fi>
> --- > mm/slab.c | 6 +++--- > 1 files changed, 3 insertions(+), 3 deletions(-) > > diff --git a/mm/slab.c b/mm/slab.c > index e556380..eacf7f0 100644 > --- a/mm/slab.c > +++ b/mm/slab.c > @@ -3637,7 +3637,7 @@ __do_kmalloc_node(size_t size, gfp_t flags, int node, void *caller) > return ret; > } > > -#if defined(CONFIG_DEBUG_SLAB) || defined(CONFIG_KMEMTRACE) > +#if defined(CONFIG_DEBUG_SLAB) || defined(CONFIG_TRACING) > void *__kmalloc_node(size_t size, gfp_t flags, int node) > { > return __do_kmalloc_node(size, flags, node, > @@ -3657,7 +3657,7 @@ void *__kmalloc_node(size_t size, gfp_t flags, int node) > return __do_kmalloc_node(size, flags, node, NULL); > } > EXPORT_SYMBOL(__kmalloc_node); > -#endif /* CONFIG_DEBUG_SLAB */ > +#endif /* CONFIG_DEBUG_SLAB || CONFIG_TRACING */ > #endif /* CONFIG_NUMA */ > > /** > @@ -3689,7 +3689,7 @@ static __always_inline void *__do_kmalloc(size_t size, gfp_t flags, > } > > > -#if defined(CONFIG_DEBUG_SLAB) || defined(CONFIG_KMEMTRACE) > +#if defined(CONFIG_DEBUG_SLAB) || defined(CONFIG_TRACING) > void *__kmalloc(size_t size, gfp_t flags) > { > return __do_kmalloc(size, flags, __builtin_return_address(0));
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