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SubjectRe: [PATCH 1/2] tracing: Define kmem_trace_alloc_notrace unconditionally
于 2009年12月11日 14:01, Pekka Enberg 写道:
> Pekka Enberg wrote:
>> Li Zefan wrote:
>>> Always define kmem_trace_alloc_{,node}_notrace(), otherwise
>>> perf-kmem will show wrong stats ifndef CONFIG_KMEMTRACE,
>>> because a kmalloc() memory allocation may be traced by
>>> both trace_kmalloc() and trace_kmem_cache_alloc().
>>> Signed-off-by: Li Zefan <>
>> Did you check how much this will make kernel text bigger because of
>> the inlining happening in kmem_cache_alloc_notrace()?
> Maybe use CONFIG_TRACING instead of CONFIG_KMEMTRACE here like in the
> other patch?

Wouldn't removing CONFIG_KMEMTRACE make the code cleaner?
Anyway, if CONFIG_TRACING is not enabled, all the trace_xxx()
will be turned into no-op.

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