[PATCH V3] cgroup: Trace event cgroup id fields should be u64

[PATCH V3] cgroup: Trace event cgroup id fields should be u64

[William Kucharski]

Various trace event fields that store cgroup IDs were declared as
ints, but cgroup_id(() returns a u64 and the structures and associated
TP_printk() calls were not updated to reflect this.

Fixes: 743210386c03 ("cgroup: use cgrp->kn->id as the cgroup ID")
Signed-off-by: William Kucharski <william.kucharski@oracle.com>
---
 V3: Reorder structures to avoid leaving alignment padding holes
 V2: Do not remove tabs from macro definitions

 include/trace/events/cgroup.h | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/include/trace/events/cgroup.h b/include/trace/events/cgroup.h
index 7f42a3de59e6..dd7d7c9efecd 100644
--- a/include/trace/events/cgroup.h
+++ b/include/trace/events/cgroup.h
@@ -59,8 +59,8 @@ DECLARE_EVENT_CLASS(cgroup,
 
 	TP_STRUCT__entry(
 		__field(	int,		root			)
-		__field(	int,		id			)
 		__field(	int,		level			)
+		__field(	u64,		id			)
 		__string(	path,		path			)
 	),
 
@@ -71,7 +71,7 @@ DECLARE_EVENT_CLASS(cgroup,
 		__assign_str(path, path);
 	),
 
-	TP_printk("root=%d id=%d level=%d path=%s",
+	TP_printk("root=%d id=%llu level=%d path=%s",
 		  __entry->root, __entry->id, __entry->level, __get_str(path))
 );
 
@@ -126,8 +126,8 @@ DECLARE_EVENT_CLASS(cgroup_migrate,
 
 	TP_STRUCT__entry(
 		__field(	int,		dst_root		)
-		__field(	int,		dst_id			)
 		__field(	int,		dst_level		)
+		__field(	u64,		dst_id			)
 		__field(	int,		pid			)
 		__string(	dst_path,	path			)
 		__string(	comm,		task->comm		)
@@ -142,7 +142,7 @@ DECLARE_EVENT_CLASS(cgroup_migrate,
 		__assign_str(comm, task->comm);
 	),
 
-	TP_printk("dst_root=%d dst_id=%d dst_level=%d dst_path=%s pid=%d comm=%s",
+	TP_printk("dst_root=%d dst_id=%llu dst_level=%d dst_path=%s pid=%d comm=%s",
 		  __entry->dst_root, __entry->dst_id, __entry->dst_level,
 		  __get_str(dst_path), __entry->pid, __get_str(comm))
 );
@@ -171,8 +171,8 @@ DECLARE_EVENT_CLASS(cgroup_event,
 
 	TP_STRUCT__entry(
 		__field(	int,		root			)
-		__field(	int,		id			)
 		__field(	int,		level			)
+		__field(	u64,		id			)
 		__string(	path,		path			)
 		__field(	int,		val			)
 	),
@@ -185,7 +185,7 @@ DECLARE_EVENT_CLASS(cgroup_event,
 		__entry->val = val;
 	),
 
-	TP_printk("root=%d id=%d level=%d path=%s val=%d",
+	TP_printk("root=%d id=%llu level=%d path=%s val=%d",
 		  __entry->root, __entry->id, __entry->level, __get_str(path),
 		  __entry->val)
 );
-- 
2.33.1

Re: [PATCH V3] cgroup: Trace event cgroup id fields should be u64

[Steven Rostedt]

On Wed,  1 Dec 2021 09:56:58 -0700
William Kucharski <william.kucharski@oracle.com> wrote:

> Various trace event fields that store cgroup IDs were declared as
> ints, but cgroup_id(() returns a u64 and the structures and associated
> TP_printk() calls were not updated to reflect this.
> 
> Fixes: 743210386c03 ("cgroup: use cgrp->kn->id as the cgroup ID")
> Signed-off-by: William Kucharski <william.kucharski@oracle.com>
> ---
>  V3: Reorder structures to avoid leaving alignment padding holes
>  V2: Do not remove tabs from macro definitions
> 
>  include/trace/events/cgroup.h | 12 ++++++------
>  1 file changed, 6 insertions(+), 6 deletions(-)

From a tracing POV:

Reviewed-by: Steven Rostedt (VMware) <rostedt@goodmis.org>

-- Steve

Re: [PATCH V3] cgroup: Trace event cgroup id fields should be u64

[Tejun Heo]

On Wed, Dec 01, 2021 at 09:56:58AM -0700, William Kucharski wrote:
> Various trace event fields that store cgroup IDs were declared as
> ints, but cgroup_id(() returns a u64 and the structures and associated
> TP_printk() calls were not updated to reflect this.
> 
> Fixes: 743210386c03 ("cgroup: use cgrp->kn->id as the cgroup ID")
> Signed-off-by: William Kucharski <william.kucharski@oracle.com>

Applied to cgroup/for-5.17.

Thanks.

-- 
tejun