On Tue 03-01-17 18:08:58, Vlastimil Babka wrote:
> On 12/28/2016 04:30 PM, Michal Hocko wrote:
> > From: Michal Hocko <mhocko@xxxxxxxx>
> >
> > mm_vmscan_lru_isolate currently prints only whether the LRU we isolate
> > from is file or anonymous but we do not know which LRU this is. It is
> > useful to know whether the list is file or anonymous as well. Change
> > the tracepoint to show symbolic names of the lru rather.
> >
> > Signed-off-by: Michal Hocko <mhocko@xxxxxxxx>
> > ---
> > include/trace/events/vmscan.h | 20 ++++++++++++++------
> > mm/vmscan.c | 2 +-
> > 2 files changed, 15 insertions(+), 7 deletions(-)
> >
> > diff --git a/include/trace/events/vmscan.h b/include/trace/events/vmscan.h
> > index 6af4dae46db2..cc0b4c456c78 100644
> > --- a/include/trace/events/vmscan.h
> > +++ b/include/trace/events/vmscan.h
> > @@ -36,6 +36,14 @@
> > (RECLAIM_WB_ASYNC) \
> > )
> >
> > +#define show_lru_name(lru) \
> > + __print_symbolic(lru, \
> > + {LRU_INACTIVE_ANON, "LRU_INACTIVE_ANON"}, \
> > + {LRU_ACTIVE_ANON, "LRU_ACTIVE_ANON"}, \
> > + {LRU_INACTIVE_FILE, "LRU_INACTIVE_FILE"}, \
> > + {LRU_ACTIVE_FILE, "LRU_ACTIVE_FILE"}, \
> > + {LRU_UNEVICTABLE, "LRU_UNEVICTABLE"})
> > +
>
> Does this work with external tools such as trace-cmd, i.e. does it export
> the correct format file?
How do I find out?
> I wouldn't expect it to be that easy to avoid the EM()/EMe() dance :)
Well, I will not pretend I understand the EM dances...
> Also can we make the symbolic names lower_case and without the LRU_ prefix?
> I think it's more consistent with other mm tracepoints, shorter and nicer.
OK, will make it lowercase without the LRU_ prefix.
--
Michal Hocko
SUSE Labs
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