From patchwork Tue Feb 4 13:26:35 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wander Lairson Costa X-Patchwork-Id: 13959231 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id EF0A225A657 for ; Tue, 4 Feb 2025 13:27:11 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.129.124 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738675633; cv=none; b=n88nNy4d6J+PvE66fqeWk2Bv8U04oGkfLkoe0VPV+okXBoECwZ5IUKDw3FABpY04OI2myAWuAcBZcvE6On7Tb8Mv/8wezYHr4ikIbfAP07lvnaeiHKU6ajWvGgCpus0x+MDwaZi6OAAg0WtOqRRta+aqjKelDpbclr/1whAw22E= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738675633; c=relaxed/simple; bh=5+zQQzeZJR1Emv3nobVatxwNfPA1kcn61LzP4rjCXZI=; h=From:To:Subject:Date:Message-ID:MIME-Version; b=RYKiVobbL+s1L+pljOQOpJ3UQHd6lzwbhu+wQIhW3o1fzksuBC6I1vHtVE4EhwOsq1c2zQQrIVxol4vpNxHA07XMD0Ocxkh77omidXyTt2vcoMR/nIp8zotkeJ/y/SIg/z2NdXh5OVsJGBBnaaS1ey6xyjeR6FKY47kY/o2hcGo= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=dT7+ipUS; arc=none smtp.client-ip=170.10.129.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="dT7+ipUS" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1738675630; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=BfyFmuhFF6AEPEpiDzd+Ou5ZlvgfIRcolj4214+ixhk=; b=dT7+ipUS7K5OTzekqMwwzzNYOv4QLGOBcK7tY+dKM5jkBAESg+PnsCYRD9c0numS/RDXxQ d+KAh66/7i1ChqjQQ17lEL+9hQfAKyi+ROQQ3yxjRNWD4Gi6I09qTSt+yLKD1HKNYjXAez QImy8JCWzBQgUGdWUguQqS9kP/YD310= Received: from mx-prod-mc-06.mail-002.prod.us-west-2.aws.redhat.com (ec2-35-165-154-97.us-west-2.compute.amazonaws.com [35.165.154.97]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-353-VhmZ0z6FOWCSkBhZU9r-Dg-1; Tue, 04 Feb 2025 08:27:07 -0500 X-MC-Unique: VhmZ0z6FOWCSkBhZU9r-Dg-1 X-Mimecast-MFC-AGG-ID: VhmZ0z6FOWCSkBhZU9r-Dg Received: from mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.93]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-06.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 6A2D318009CD; Tue, 4 Feb 2025 13:27:04 +0000 (UTC) Received: from wcosta-thinkpadt14gen4.rmtbr.csb (unknown [10.22.88.92]) by mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 2E2AB18008C0; Tue, 4 Feb 2025 13:26:58 +0000 (UTC) From: Wander Lairson Costa To: Steven Rostedt , Masami Hiramatsu , Mathieu Desnoyers , Andrew Morton , "Darrick J. Wong" , Michal Hocko , Roman Gushchin , Wander Lairson Costa , Johannes Weiner , Richard Chang , linux-kernel@vger.kernel.org (open list:TRACING), linux-trace-kernel@vger.kernel.org (open list:TRACING) Subject: [PATCH v2] kmem/tracing: Add kmem name to kmem_cache_alloc tracepoint Date: Tue, 4 Feb 2025 10:26:35 -0300 Message-ID: <20250204132637.21652-1-wander@redhat.com> Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.93 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. Signed-off-by: Wander Lairson Costa --- Changes: v2: move the "name" field to avoid a hole in the struct. Signed-off-by: Wander Lairson Costa --- include/trace/events/kmem.h | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/include/trace/events/kmem.h b/include/trace/events/kmem.h index b37eb0a7060f..c6aea6610cf5 100644 --- a/include/trace/events/kmem.h +++ b/include/trace/events/kmem.h @@ -26,12 +26,14 @@ TRACE_EVENT(kmem_cache_alloc, __field( size_t, bytes_alloc ) __field( unsigned long, gfp_flags ) __field( int, node ) + __string( name, s->name ) __field( bool, accounted ) ), 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),