Re: [PATCH 2/2] mm/page_ref: add tracepoint to track down page reference manipulation

On (02/15/16 14:08), Sergey Senozhatsky wrote:

will this compile with !CONFIG_TRACEPOINTS config?

uh.. sorry, was composed in email client. seems the correct way to do it is

+#if defined CONFIG_DEBUG_PAGE_REF && defined CONFIG_TRACEPOINTS

 #include <linux/tracepoint-defs.h>

 #define page_ref_tracepoint_active(t) static_key_false(&(t).key)

 extern struct tracepoint __tracepoint_page_ref_set;
 ...

 extern void __page_ref_set(struct page *page, int v);
 ...

#else

 #define page_ref_tracepoint_active(t) false

 static inline void __page_ref_set(struct page *page, int v)
 {
 }
 ...

#endif



or add a dependency of PAGE_REF on CONFIG_TRACEPOINTS in Kconfig.

	-ss