1. 根目录:
2. include
3. trace
4. events
5. kmem.h

#undef TRACE_SYSTEM
#define TRACE_SYSTEM kmem

#if !defined(_TRACE_KMEM_H) || defined(TRACE_HEADER_MULTI_READ)
#define _TRACE_KMEM_H

#include <linux/types.h>
#include <linux/tracepoint.h>
#include <trace/events/gfpflags.h>

DECLARE_EVENT_CLASS(kmem_alloc,

	TP_PROTO(unsigned long call_site,
		 const void *ptr,
		 size_t bytes_req,
		 size_t bytes_alloc,
		 gfp_t gfp_flags),

	TP_ARGS(call_site, ptr, bytes_req, bytes_alloc, gfp_flags),

	TP_STRUCT__entry(
		__field(	unsigned long,	call_site	)
		__field(	const void *,	ptr		)
		__field(	size_t,		bytes_req	)
		__field(	size_t,		bytes_alloc	)
		__field(	gfp_t,		gfp_flags	)
	),

	TP_fast_assign(
		__entry->call_site	= call_site;
		__entry->ptr		= ptr;
		__entry->bytes_req	= bytes_req;
		__entry->bytes_alloc	= bytes_alloc;
		__entry->gfp_flags	= gfp_flags;
	),

	TP_printk("call_site=%lx ptr=%p bytes_req=%zu bytes_alloc=%zu gfp_flags=%s",
		__entry->call_site,
		__entry->ptr,
		__entry->bytes_req,
		__entry->bytes_alloc,
		show_gfp_flags(__entry->gfp_flags))
);

DEFINE_EVENT(kmem_alloc, kmalloc,

	TP_PROTO(unsigned long call_site, const void *ptr,
		 size_t bytes_req, size_t bytes_alloc, gfp_t gfp_flags),

	TP_ARGS(call_site, ptr, bytes_req, bytes_alloc, gfp_flags)
);

DEFINE_EVENT(kmem_alloc, kmem_cache_alloc,

	TP_PROTO(unsigned long call_site, const void *ptr,
		 size_t bytes_req, size_t bytes_alloc, gfp_t gfp_flags),

	TP_ARGS(call_site, ptr, bytes_req, bytes_alloc, gfp_flags)
);

DECLARE_EVENT_CLASS(kmem_alloc_node,

	TP_PROTO(unsigned long call_site,
		 const void *ptr,
		 size_t bytes_req,
		 size_t bytes_alloc,
		 gfp_t gfp_flags,
		 int node),

	TP_ARGS(call_site, ptr, bytes_req, bytes_alloc, gfp_flags, node),

	TP_STRUCT__entry(
		__field(	unsigned long,	call_site	)
		__field(	const void *,	ptr		)
		__field(	size_t,		bytes_req	)
		__field(	size_t,		bytes_alloc	)
		__field(	gfp_t,		gfp_flags	)
		__field(	int,		node		)
	),

	TP_fast_assign(
		__entry->call_site	= call_site;
		__entry->ptr		= ptr;
		__entry->bytes_req	= bytes_req;
		__entry->bytes_alloc	= bytes_alloc;
		__entry->gfp_flags	= gfp_flags;
		__entry->node		= node;
	),

	TP_printk("call_site=%lx ptr=%p bytes_req=%zu bytes_alloc=%zu gfp_flags=%s node=%d",
		__entry->call_site,
		__entry->ptr,
		__entry->bytes_req,
		__entry->bytes_alloc,
		show_gfp_flags(__entry->gfp_flags),
		__entry->node)
);

DEFINE_EVENT(kmem_alloc_node, kmalloc_node,

	TP_PROTO(unsigned long call_site, const void *ptr,
		 size_t bytes_req, size_t bytes_alloc,
		 gfp_t gfp_flags, int node),

	TP_ARGS(call_site, ptr, bytes_req, bytes_alloc, gfp_flags, node)
);

DEFINE_EVENT(kmem_alloc_node, kmem_cache_alloc_node,

	TP_PROTO(unsigned long call_site, const void *ptr,
		 size_t bytes_req, size_t bytes_alloc,
		 gfp_t gfp_flags, int node),

	TP_ARGS(call_site, ptr, bytes_req, bytes_alloc, gfp_flags, node)
);

DECLARE_EVENT_CLASS(kmem_free,

	TP_PROTO(unsigned long call_site, const void *ptr),

	TP_ARGS(call_site, ptr),

	TP_STRUCT__entry(
		__field(	unsigned long,	call_site	)
		__field(	const void *,	ptr		)
	),

	TP_fast_assign(
		__entry->call_site	= call_site;
		__entry->ptr		= ptr;
	),

	TP_printk("call_site=%lx ptr=%p", __entry->call_site, __entry->ptr)
);

DEFINE_EVENT(kmem_free, kfree,

	TP_PROTO(unsigned long call_site, const void *ptr),

	TP_ARGS(call_site, ptr)
);

DEFINE_EVENT_CONDITION(kmem_free, kmem_cache_free,

	TP_PROTO(unsigned long call_site, const void *ptr),

	TP_ARGS(call_site, ptr),

	/*
	 * This trace can be potentially called from an offlined cpu.
	 * Since trace points use RCU and RCU should not be used from
	 * offline cpus, filter such calls out.
	 * While this trace can be called from a preemptable section,
	 * it has no impact on the condition since tasks can migrate
	 * only from online cpus to other online cpus. Thus its safe
	 * to use raw_smp_processor_id.
	 */
	TP_CONDITION(cpu_online(raw_smp_processor_id()))
);

TRACE_EVENT_CONDITION(mm_page_free,

	TP_PROTO(struct page *page, unsigned int order),

	TP_ARGS(page, order),


	/*
	 * This trace can be potentially called from an offlined cpu.
	 * Since trace points use RCU and RCU should not be used from
	 * offline cpus, filter such calls out.
	 * While this trace can be called from a preemptable section,
	 * it has no impact on the condition since tasks can migrate
	 * only from online cpus to other online cpus. Thus its safe
	 * to use raw_smp_processor_id.
	 */
	TP_CONDITION(cpu_online(raw_smp_processor_id())),

	TP_STRUCT__entry(
		__field(	unsigned long,	pfn		)
		__field(	unsigned int,	order		)
	),

	TP_fast_assign(
		__entry->pfn		= page_to_pfn(page);
		__entry->order		= order;
	),

	TP_printk("page=%p pfn=%lu order=%d",
			pfn_to_page(__entry->pfn),
			__entry->pfn,
			__entry->order)
);

TRACE_EVENT(mm_page_free_batched,

	TP_PROTO(struct page *page, int cold),

	TP_ARGS(page, cold),

	TP_STRUCT__entry(
		__field(	unsigned long,	pfn		)
		__field(	int,		cold		)
	),

	TP_fast_assign(
		__entry->pfn		= page_to_pfn(page);
		__entry->cold		= cold;
	),

	TP_printk("page=%p pfn=%lu order=0 cold=%d",
			pfn_to_page(__entry->pfn),
			__entry->pfn,
			__entry->cold)
);

TRACE_EVENT(mm_page_alloc,

	TP_PROTO(struct page *page, unsigned int order,
			gfp_t gfp_flags, int migratetype),

	TP_ARGS(page, order, gfp_flags, migratetype),

	TP_STRUCT__entry(
		__field(	unsigned long,	pfn		)
		__field(	unsigned int,	order		)
		__field(	gfp_t,		gfp_flags	)
		__field(	int,		migratetype	)
	),

	TP_fast_assign(
		__entry->pfn		= page ? page_to_pfn(page) : -1UL;
		__entry->order		= order;
		__entry->gfp_flags	= gfp_flags;
		__entry->migratetype	= migratetype;
	),

	TP_printk("page=%p pfn=%lu order=%d migratetype=%d gfp_flags=%s",
		__entry->pfn != -1UL ? pfn_to_page(__entry->pfn) : NULL,
		__entry->pfn != -1UL ? __entry->pfn : 0,
		__entry->order,
		__entry->migratetype,
		show_gfp_flags(__entry->gfp_flags))
);

DECLARE_EVENT_CLASS(mm_page,

	TP_PROTO(struct page *page, unsigned int order, int migratetype),

	TP_ARGS(page, order, migratetype),

	TP_STRUCT__entry(
		__field(	unsigned long,	pfn		)
		__field(	unsigned int,	order		)
		__field(	int,		migratetype	)
	),

	TP_fast_assign(
		__entry->pfn		= page ? page_to_pfn(page) : -1UL;
		__entry->order		= order;
		__entry->migratetype	= migratetype;
	),

	TP_printk("page=%p pfn=%lu order=%u migratetype=%d percpu_refill=%d",
		__entry->pfn != -1UL ? pfn_to_page(__entry->pfn) : NULL,
		__entry->pfn != -1UL ? __entry->pfn : 0,
		__entry->order,
		__entry->migratetype,
		__entry->order == 0)
);

DEFINE_EVENT(mm_page, mm_page_alloc_zone_locked,

	TP_PROTO(struct page *page, unsigned int order, int migratetype),

	TP_ARGS(page, order, migratetype)
);

TRACE_EVENT_CONDITION(mm_page_pcpu_drain,

	TP_PROTO(struct page *page, unsigned int order, int migratetype),

	TP_ARGS(page, order, migratetype),

	/*
	 * This trace can be potentially called from an offlined cpu.
	 * Since trace points use RCU and RCU should not be used from
	 * offline cpus, filter such calls out.
	 * While this trace can be called from a preemptable section,
	 * it has no impact on the condition since tasks can migrate
	 * only from online cpus to other online cpus. Thus its safe
	 * to use raw_smp_processor_id.
	 */
	TP_CONDITION(cpu_online(raw_smp_processor_id())),

	TP_STRUCT__entry(
		__field(	unsigned long,	pfn		)
		__field(	unsigned int,	order		)
		__field(	int,		migratetype	)
	),

	TP_fast_assign(
		__entry->pfn		= page ? page_to_pfn(page) : -1UL;
		__entry->order		= order;
		__entry->migratetype	= migratetype;
	),

	TP_printk("page=%p pfn=%lu order=%d migratetype=%d",
		pfn_to_page(__entry->pfn), __entry->pfn,
		__entry->order, __entry->migratetype)
);

TRACE_EVENT(mm_page_alloc_extfrag,

	TP_PROTO(struct page *page,
		int alloc_order, int fallback_order,
		int alloc_migratetype, int fallback_migratetype),

	TP_ARGS(page,
		alloc_order, fallback_order,
		alloc_migratetype, fallback_migratetype),

	TP_STRUCT__entry(
		__field(	unsigned long,	pfn			)
		__field(	int,		alloc_order		)
		__field(	int,		fallback_order		)
		__field(	int,		alloc_migratetype	)
		__field(	int,		fallback_migratetype	)
		__field(	int,		change_ownership	)
	),

	TP_fast_assign(
		__entry->pfn			= page_to_pfn(page);
		__entry->alloc_order		= alloc_order;
		__entry->fallback_order		= fallback_order;
		__entry->alloc_migratetype	= alloc_migratetype;
		__entry->fallback_migratetype	= fallback_migratetype;
		__entry->change_ownership	= (alloc_migratetype ==
					get_pageblock_migratetype(page));
	),

	TP_printk("page=%p pfn=%lu alloc_order=%d fallback_order=%d pageblock_order=%d alloc_migratetype=%d fallback_migratetype=%d fragmenting=%d change_ownership=%d",
		pfn_to_page(__entry->pfn),
		__entry->pfn,
		__entry->alloc_order,
		__entry->fallback_order,
		pageblock_order,
		__entry->alloc_migratetype,
		__entry->fallback_migratetype,
		__entry->fallback_order < pageblock_order,
		__entry->change_ownership)
);

#endif /* _TRACE_KMEM_H */

/* This part must be outside protection */
#include <trace/define_trace.h>