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kmem/tracing: add kmem name to kmem_cache_alloc tracepoint

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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: Wander 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: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Wander Lairson Costa
2025-08-25 09:59:26 -03:00
committed by Andrew Morton
parent 46afff4599
commit dfd04add59
1 changed files with 4 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
include/trace/events/kmem.h
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@@ -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),