Re: [PATCH 2/2] mm/page_ref: add tracepoint to track down page reference manipulation
From: Sergey Senozhatsky <hidden>
Date: 2016-02-15 05:27:42
Also in:
linux-api, lkml
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
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