mm: tracing: Export enums in tracepoints to user space
The enums used in tracepoints with __print_symbolic() have their names shown in the tracepoint format files and not their values. This makes it difficult for user space tools to convert the binary data to the strings as user space does not know what those enums are about. By having them use TRACE_DEFINE_ENUM(), the names of the enums will be mapped to the values and shown to user space. Link: http://lkml.kernel.org/r/20150403013802.220157513@goodmis.org Reviewed-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Tested-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
This commit is contained in:
parent
f0a91b3caa
commit
190f0b76ca
|
@ -7,18 +7,40 @@
|
|||
#include <linux/tracepoint.h>
|
||||
|
||||
#define MIGRATE_MODE \
|
||||
{MIGRATE_ASYNC, "MIGRATE_ASYNC"}, \
|
||||
{MIGRATE_SYNC_LIGHT, "MIGRATE_SYNC_LIGHT"}, \
|
||||
{MIGRATE_SYNC, "MIGRATE_SYNC"}
|
||||
EM( MIGRATE_ASYNC, "MIGRATE_ASYNC") \
|
||||
EM( MIGRATE_SYNC_LIGHT, "MIGRATE_SYNC_LIGHT") \
|
||||
EMe(MIGRATE_SYNC, "MIGRATE_SYNC")
|
||||
|
||||
|
||||
#define MIGRATE_REASON \
|
||||
{MR_COMPACTION, "compaction"}, \
|
||||
{MR_MEMORY_FAILURE, "memory_failure"}, \
|
||||
{MR_MEMORY_HOTPLUG, "memory_hotplug"}, \
|
||||
{MR_SYSCALL, "syscall_or_cpuset"}, \
|
||||
{MR_MEMPOLICY_MBIND, "mempolicy_mbind"}, \
|
||||
{MR_NUMA_MISPLACED, "numa_misplaced"}, \
|
||||
{MR_CMA, "cma"}
|
||||
EM( MR_COMPACTION, "compaction") \
|
||||
EM( MR_MEMORY_FAILURE, "memory_failure") \
|
||||
EM( MR_MEMORY_HOTPLUG, "memory_hotplug") \
|
||||
EM( MR_SYSCALL, "syscall_or_cpuset") \
|
||||
EM( MR_MEMPOLICY_MBIND, "mempolicy_mbind") \
|
||||
EM( MR_NUMA_MISPLACED, "numa_misplaced") \
|
||||
EMe(MR_CMA, "cma")
|
||||
|
||||
/*
|
||||
* First define the enums in the above macros to be exported to userspace
|
||||
* via TRACE_DEFINE_ENUM().
|
||||
*/
|
||||
#undef EM
|
||||
#undef EMe
|
||||
#define EM(a, b) TRACE_DEFINE_ENUM(a);
|
||||
#define EMe(a, b) TRACE_DEFINE_ENUM(a);
|
||||
|
||||
MIGRATE_MODE
|
||||
MIGRATE_REASON
|
||||
|
||||
/*
|
||||
* Now redefine the EM() and EMe() macros to map the enums to the strings
|
||||
* that will be printed in the output.
|
||||
*/
|
||||
#undef EM
|
||||
#undef EMe
|
||||
#define EM(a, b) {a, b},
|
||||
#define EMe(a, b) {a, b}
|
||||
|
||||
TRACE_EVENT(mm_migrate_pages,
|
||||
|
||||
|
|
Loading…
Reference in a new issue