linux/include/trace
Ovidiu Panait f900110782 mm, tracing: improve rss_stat tracepoint message
Adjust the rss_stat tracepoint to print the name of the resident page type
that got updated (e.g. MM_ANONPAGES/MM_FILEPAGES), rather than the numeric
index corresponding to it (the __entry->member value):

Before this patch:
------------------
  rss_stat: mm_id=1216113068 curr=0 member=1 size=28672B
  rss_stat: mm_id=1216113068 curr=0 member=1 size=0B
  rss_stat: mm_id=534402304 curr=1 member=0 size=188416B
  rss_stat: mm_id=534402304 curr=1 member=1 size=40960B

After this patch:
-----------------
  rss_stat: mm_id=1726253524 curr=1 type=MM_ANONPAGES size=40960B
  rss_stat: mm_id=1726253524 curr=1 type=MM_FILEPAGES size=663552B
  rss_stat: mm_id=1726253524 curr=1 type=MM_ANONPAGES size=65536B
  rss_stat: mm_id=1726253524 curr=1 type=MM_FILEPAGES size=647168B

Use TRACE_DEFINE_ENUM()/__print_symbolic() logic to map the enum values to
the strings they represent, so that userspace tools can also parse the raw
data correctly.

Link: https://lkml.kernel.org/r/20210310162305.4862-1-ovidiu.panait@windriver.com
Signed-off-by: Ovidiu Panait <ovidiu.panait@windriver.com>
Suggested-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Reviewed-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2021-04-30 11:20:39 -07:00
..
events mm, tracing: improve rss_stat tracepoint message 2021-04-30 11:20:39 -07:00
bpf_probe.h trace: bpf: Allow bpf to attach to bare tracepoints 2021-01-20 14:13:59 -08:00
define_trace.h tracepoint: Optimize using static_call() 2020-09-01 09:58:06 +02:00
perf.h
syscall.h tracepoints: Migrate to use SYSCALL_WORK flag 2020-11-16 21:53:15 +01:00
trace_events.h tracing: Update the stage 3 of trace event macro comment 2021-02-11 16:31:57 -05:00