From: Michal Hocko <mhocko@kernel.org>
To: Vlastimil Babka <vbabka@suse.cz>
Cc: linux-mm@kvack.org, Andrew Morton <akpm@linux-foundation.org>,
Mel Gorman <mgorman@suse.de>,
Johannes Weiner <hannes@cmpxchg.org>,
Rik van Riel <riel@redhat.com>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 4/7] mm, vmscan: show LRU name in mm_vmscan_lru_isolate tracepoint
Date: Tue, 3 Jan 2017 22:24:11 +0100 [thread overview]
Message-ID: <20170103212411.GA17822@dhcp22.suse.cz> (raw)
In-Reply-To: <20170103205244.GD13873@dhcp22.suse.cz>
On Tue 03-01-17 21:52:44, Michal Hocko wrote:
> On Tue 03-01-17 21:47:45, Michal Hocko wrote:
> > 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@suse.com>
> > > >
> > > > 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@suse.com>
> > > > ---
> > > > 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?
>
> Well, I've just checked the format file and it says
> print fmt: "isolate_mode=%d classzone=%d order=%d nr_requested=%lu nr_scanned=%lu nr_skipped=%lu nr_taken=%lu lru=%s", REC->isolate_mode, REC->classzone_idx, REC->order, REC->nr_requested, REC->nr_scanned, REC->nr_skipped, REC->nr_taken, __print_symbolic(REC->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"})
>
> So the tool should be OK as long as it can find values for LRU_*
> constants. Is this what is the problem?
OK, I got it. We need enum->value translation and all the EM stuff to do
that, right?
I will rework the patch and move the definition to the rest of the EM
family...
--
Michal Hocko
SUSE Labs
next prev parent reply other threads:[~2017-01-03 22:14 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-28 15:30 [PATCH 0/7] vm, vmscan: enahance vmscan tracepoints Michal Hocko
2016-12-28 15:30 ` [PATCH 1/7] mm, vmscan: remove unused mm_vmscan_memcg_isolate Michal Hocko
2016-12-29 7:33 ` Hillf Danton
2016-12-28 15:30 ` [PATCH 2/7] mm, vmscan: add active list aging tracepoint Michal Hocko
2016-12-29 5:33 ` Minchan Kim
2016-12-29 7:52 ` Michal Hocko
2016-12-30 1:48 ` Minchan Kim
2016-12-30 9:26 ` Michal Hocko
2016-12-30 9:38 ` Hillf Danton
2016-12-30 16:04 ` Minchan Kim
2016-12-30 16:37 ` Michal Hocko
2016-12-30 17:30 ` Michal Hocko
2017-01-03 5:03 ` Minchan Kim
2017-01-03 8:21 ` Michal Hocko
2017-01-04 5:07 ` Minchan Kim
2017-01-04 7:28 ` Vlastimil Babka
2017-01-04 7:50 ` Michal Hocko
2016-12-29 7:44 ` Hillf Danton
2016-12-28 15:30 ` [PATCH 3/7] mm, vmscan: show the number of skipped pages in mm_vmscan_lru_isolate Michal Hocko
2016-12-29 5:53 ` Minchan Kim
2016-12-29 7:49 ` Hillf Danton
2017-01-03 17:21 ` Vlastimil Babka
2017-01-03 20:43 ` Michal Hocko
2016-12-28 15:30 ` [PATCH 4/7] mm, vmscan: show LRU name in mm_vmscan_lru_isolate tracepoint Michal Hocko
2016-12-28 15:50 ` Nikolay Borisov
2016-12-28 16:00 ` Michal Hocko
2016-12-28 16:40 ` Nikolay Borisov
2016-12-28 16:49 ` Michal Hocko
2016-12-29 6:02 ` Minchan Kim
2016-12-29 7:56 ` Michal Hocko
2016-12-30 1:56 ` Minchan Kim
2016-12-30 9:33 ` Michal Hocko
2016-12-29 7:53 ` Hillf Danton
2017-01-03 17:08 ` Vlastimil Babka
2017-01-03 20:47 ` Michal Hocko
2017-01-03 20:52 ` Michal Hocko
2017-01-03 21:24 ` Michal Hocko [this message]
2017-01-03 21:40 ` Vlastimil Babka
2017-01-03 21:48 ` Michal Hocko
2016-12-28 15:30 ` [PATCH 5/7] mm, vmscan: extract shrink_page_list reclaim counters into a struct Michal Hocko
2016-12-29 8:00 ` Hillf Danton
2016-12-28 15:30 ` [PATCH 6/7] mm, vmscan: enhance mm_vmscan_lru_shrink_inactive tracepoint Michal Hocko
2016-12-29 8:05 ` Hillf Danton
2016-12-28 15:30 ` [PATCH 7/7] mm, vmscan: add mm_vmscan_inactive_list_is_low tracepoint Michal Hocko
2016-12-29 8:19 ` Hillf Danton
2016-12-30 9:11 ` [PATCH 0/7] vm, vmscan: enahance vmscan tracepoints Mel Gorman
2016-12-30 9:36 ` Michal Hocko
2016-12-30 10:20 ` Mel Gorman
2017-01-04 10:19 [PATCH 0/7 v2] " Michal Hocko
2017-01-04 10:19 ` [PATCH 4/7] mm, vmscan: show LRU name in mm_vmscan_lru_isolate tracepoint Michal Hocko
2017-01-05 6:04 ` Minchan Kim
2017-01-05 10:16 ` Michal Hocko
2017-01-05 14:56 ` Mel Gorman
2017-01-05 15:17 ` Michal Hocko
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