Commit dfd04add authored by Wander Lairson Costa's avatar Wander Lairson Costa Committed by Andrew Morton
Browse files

kmem/tracing: add kmem name to kmem_cache_alloc tracepoint 

The kmem_cache_free tracepoint includes a "name" field, which allows for
easy identification and filtering of specific kmem's.  However, the
kmem_cache_alloc tracepoint lacks this field, making it difficult to pair
corresponding alloc and free events for analysis.

Add the "name" field to kmem_cache_alloc to enable consistent tracking and
correlation of kmem alloc and free events.

Link: https://lkml.kernel.org/r/20250825125927.59816-1-wander@redhat.com


Signed-off-by: default avatarWander Lairson Costa <wander@redhat.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Martin Liu <liumartin@google.com>
Cc: "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent 46afff45

include/trace/events/kmem.h

+4 −1
Original line number Diff line number Diff line
@@ -22,6 +22,7 @@ TRACE_EVENT(kmem_cache_alloc, 
	TP_STRUCT__entry(

		__field(	unsigned long,	call_site	)

		__field(	const void *,	ptr		)

		__string(	name,		s->name		)

		__field(	size_t,		bytes_req	)

		__field(	size_t,		bytes_alloc	)

		__field(	unsigned long,	gfp_flags	)
@@ -32,6 +33,7 @@ TRACE_EVENT(kmem_cache_alloc, 
	TP_fast_assign(

		__entry->call_site	= call_site;

		__entry->ptr		= ptr;

		__assign_str(name);

		__entry->bytes_req	= s->object_size;

		__entry->bytes_alloc	= s->size;

		__entry->gfp_flags	= (__force unsigned long)gfp_flags;
@@ -41,9 +43,10 @@ TRACE_EVENT(kmem_cache_alloc, 
					  (s->flags & SLAB_ACCOUNT)) : false;

	),



	TP_printk("call_site=%pS ptr=%p bytes_req=%zu bytes_alloc=%zu gfp_flags=%s node=%d accounted=%s",

	TP_printk("call_site=%pS ptr=%p name=%s bytes_req=%zu bytes_alloc=%zu gfp_flags=%s node=%d accounted=%s",

		(void *)__entry->call_site,

		__entry->ptr,

		__get_str(name),

		__entry->bytes_req,

		__entry->bytes_alloc,

		show_gfp_flags(__entry->gfp_flags),