From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wj0-f199.google.com (mail-wj0-f199.google.com [209.85.210.199]) by kanga.kvack.org (Postfix) with ESMTP id A1B0E6B0069 for ; Tue, 3 Jan 2017 16:24:16 -0500 (EST) Received: by mail-wj0-f199.google.com with SMTP id hb5so112890189wjc.2 for ; Tue, 03 Jan 2017 13:24:16 -0800 (PST) Received: from mx2.suse.de (mx2.suse.de. [195.135.220.15]) by mx.google.com with ESMTPS id l6si78595715wje.169.2017.01.03.13.24.14 for (version=TLS1 cipher=AES128-SHA bits=128/128); Tue, 03 Jan 2017 13:24:14 -0800 (PST) Date: Tue, 3 Jan 2017 22:24:11 +0100 From: Michal Hocko Subject: Re: [PATCH 4/7] mm, vmscan: show LRU name in mm_vmscan_lru_isolate tracepoint Message-ID: <20170103212411.GA17822@dhcp22.suse.cz> References: <20161228153032.10821-1-mhocko@kernel.org> <20161228153032.10821-5-mhocko@kernel.org> <19b44b6e-037f-45fd-a13a-be5d87259e75@suse.cz> <20170103204745.GC13873@dhcp22.suse.cz> <20170103205244.GD13873@dhcp22.suse.cz> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20170103205244.GD13873@dhcp22.suse.cz> Sender: owner-linux-mm@kvack.org List-ID: To: Vlastimil Babka Cc: linux-mm@kvack.org, Andrew Morton , Mel Gorman , Johannes Weiner , Rik van Riel , LKML 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 > > > > > > > > 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 > > > > --- > > > > 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 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org