From: Michal Hocko <mhocko@kernel.org> To: Minchan Kim <minchan@kernel.org> Cc: linux-mm@kvack.org, Andrew Morton <akpm@linux-foundation.org>, Mel Gorman <mgorman@suse.de>, Johannes Weiner <hannes@cmpxchg.org>, Vlastimil Babka <vbabka@suse.cz>, Rik van Riel <riel@redhat.com>, LKML <linux-kernel@vger.kernel.org> Subject: Re: [PATCH 2/7] mm, vmscan: add active list aging tracepoint Date: Thu, 29 Dec 2016 08:52:46 +0100 [thread overview] Message-ID: <20161229075243.GA29208@dhcp22.suse.cz> (raw) In-Reply-To: <20161229053359.GA1815@bbox> On Thu 29-12-16 14:33:59, Minchan Kim wrote: > On Wed, Dec 28, 2016 at 04:30:27PM +0100, Michal Hocko wrote: > > From: Michal Hocko <mhocko@suse.com> > > > > Our reclaim process has several tracepoints to tell us more about how > > things are progressing. We are, however, missing a tracepoint to track > > active list aging. Introduce mm_vmscan_lru_shrink_active which reports > > the number of scanned, rotated, deactivated and freed pages from the > > particular node's active list. > > > > Signed-off-by: Michal Hocko <mhocko@suse.com> > > --- > > include/linux/gfp.h | 2 +- > > include/trace/events/vmscan.h | 38 ++++++++++++++++++++++++++++++++++++++ > > mm/page_alloc.c | 6 +++++- > > mm/vmscan.c | 22 +++++++++++++++++----- > > 4 files changed, 61 insertions(+), 7 deletions(-) > > > > diff --git a/include/linux/gfp.h b/include/linux/gfp.h > > index 4175dca4ac39..61aa9b49e86d 100644 > > --- a/include/linux/gfp.h > > +++ b/include/linux/gfp.h > > @@ -503,7 +503,7 @@ void * __meminit alloc_pages_exact_nid(int nid, size_t size, gfp_t gfp_mask); > > extern void __free_pages(struct page *page, unsigned int order); > > extern void free_pages(unsigned long addr, unsigned int order); > > extern void free_hot_cold_page(struct page *page, bool cold); > > -extern void free_hot_cold_page_list(struct list_head *list, bool cold); > > +extern int free_hot_cold_page_list(struct list_head *list, bool cold); > > > > struct page_frag_cache; > > extern void __page_frag_drain(struct page *page, unsigned int order, > > diff --git a/include/trace/events/vmscan.h b/include/trace/events/vmscan.h > > index 39bad8921ca1..d34cc0ced2be 100644 > > --- a/include/trace/events/vmscan.h > > +++ b/include/trace/events/vmscan.h > > @@ -363,6 +363,44 @@ TRACE_EVENT(mm_vmscan_lru_shrink_inactive, > > show_reclaim_flags(__entry->reclaim_flags)) > > ); > > > > +TRACE_EVENT(mm_vmscan_lru_shrink_active, > > + > > + TP_PROTO(int nid, unsigned long nr_scanned, unsigned long nr_freed, > > + unsigned long nr_unevictable, unsigned long nr_deactivated, > > + unsigned long nr_rotated, int priority, int file), > > + > > + TP_ARGS(nid, nr_scanned, nr_freed, nr_unevictable, nr_deactivated, nr_rotated, priority, file), > > I agree it is helpful. And it was when I investigated aging problem of 32bit > when node-lru was introduced. However, the question is we really need all those > kinds of information? just enough with nr_taken, nr_deactivated, priority, file? Dunno. Is it harmful to add this information? I like it more when the numbers just add up and you have a clear picture. You never know what might be useful when debugging a weird behavior. [...] > > - move_active_pages_to_lru(lruvec, &l_active, &l_hold, lru); > > - move_active_pages_to_lru(lruvec, &l_inactive, &l_hold, lru - LRU_ACTIVE); > > + nr_activate = move_active_pages_to_lru(lruvec, &l_active, &l_hold, lru); > > Who use nr_active in here? this is an omission. I just forgot to add it... Thanks for noticing. -- Michal Hocko SUSE Labs
WARNING: multiple messages have this Message-ID (diff)
From: Michal Hocko <mhocko@kernel.org> To: Minchan Kim <minchan@kernel.org> Cc: linux-mm@kvack.org, Andrew Morton <akpm@linux-foundation.org>, Mel Gorman <mgorman@suse.de>, Johannes Weiner <hannes@cmpxchg.org>, Vlastimil Babka <vbabka@suse.cz>, Rik van Riel <riel@redhat.com>, LKML <linux-kernel@vger.kernel.org> Subject: Re: [PATCH 2/7] mm, vmscan: add active list aging tracepoint Date: Thu, 29 Dec 2016 08:52:46 +0100 [thread overview] Message-ID: <20161229075243.GA29208@dhcp22.suse.cz> (raw) In-Reply-To: <20161229053359.GA1815@bbox> On Thu 29-12-16 14:33:59, Minchan Kim wrote: > On Wed, Dec 28, 2016 at 04:30:27PM +0100, Michal Hocko wrote: > > From: Michal Hocko <mhocko@suse.com> > > > > Our reclaim process has several tracepoints to tell us more about how > > things are progressing. We are, however, missing a tracepoint to track > > active list aging. Introduce mm_vmscan_lru_shrink_active which reports > > the number of scanned, rotated, deactivated and freed pages from the > > particular node's active list. > > > > Signed-off-by: Michal Hocko <mhocko@suse.com> > > --- > > include/linux/gfp.h | 2 +- > > include/trace/events/vmscan.h | 38 ++++++++++++++++++++++++++++++++++++++ > > mm/page_alloc.c | 6 +++++- > > mm/vmscan.c | 22 +++++++++++++++++----- > > 4 files changed, 61 insertions(+), 7 deletions(-) > > > > diff --git a/include/linux/gfp.h b/include/linux/gfp.h > > index 4175dca4ac39..61aa9b49e86d 100644 > > --- a/include/linux/gfp.h > > +++ b/include/linux/gfp.h > > @@ -503,7 +503,7 @@ void * __meminit alloc_pages_exact_nid(int nid, size_t size, gfp_t gfp_mask); > > extern void __free_pages(struct page *page, unsigned int order); > > extern void free_pages(unsigned long addr, unsigned int order); > > extern void free_hot_cold_page(struct page *page, bool cold); > > -extern void free_hot_cold_page_list(struct list_head *list, bool cold); > > +extern int free_hot_cold_page_list(struct list_head *list, bool cold); > > > > struct page_frag_cache; > > extern void __page_frag_drain(struct page *page, unsigned int order, > > diff --git a/include/trace/events/vmscan.h b/include/trace/events/vmscan.h > > index 39bad8921ca1..d34cc0ced2be 100644 > > --- a/include/trace/events/vmscan.h > > +++ b/include/trace/events/vmscan.h > > @@ -363,6 +363,44 @@ TRACE_EVENT(mm_vmscan_lru_shrink_inactive, > > show_reclaim_flags(__entry->reclaim_flags)) > > ); > > > > +TRACE_EVENT(mm_vmscan_lru_shrink_active, > > + > > + TP_PROTO(int nid, unsigned long nr_scanned, unsigned long nr_freed, > > + unsigned long nr_unevictable, unsigned long nr_deactivated, > > + unsigned long nr_rotated, int priority, int file), > > + > > + TP_ARGS(nid, nr_scanned, nr_freed, nr_unevictable, nr_deactivated, nr_rotated, priority, file), > > I agree it is helpful. And it was when I investigated aging problem of 32bit > when node-lru was introduced. However, the question is we really need all those > kinds of information? just enough with nr_taken, nr_deactivated, priority, file? Dunno. Is it harmful to add this information? I like it more when the numbers just add up and you have a clear picture. You never know what might be useful when debugging a weird behavior. [...] > > - move_active_pages_to_lru(lruvec, &l_active, &l_hold, lru); > > - move_active_pages_to_lru(lruvec, &l_inactive, &l_hold, lru - LRU_ACTIVE); > > + nr_activate = move_active_pages_to_lru(lruvec, &l_active, &l_hold, lru); > > Who use nr_active in here? this is an omission. I just forgot to add it... Thanks for noticing. -- 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: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
next prev parent reply other threads:[~2016-12-29 7:52 UTC|newest] Thread overview: 108+ 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 ` Michal Hocko 2016-12-28 15:30 ` [PATCH 1/7] mm, vmscan: remove unused mm_vmscan_memcg_isolate Michal Hocko 2016-12-28 15:30 ` Michal Hocko 2016-12-29 7:33 ` Hillf Danton 2016-12-29 7:33 ` Hillf Danton 2016-12-28 15:30 ` [PATCH 2/7] mm, vmscan: add active list aging tracepoint Michal Hocko 2016-12-28 15:30 ` Michal Hocko 2016-12-29 5:33 ` Minchan Kim 2016-12-29 5:33 ` Minchan Kim 2016-12-29 7:52 ` Michal Hocko [this message] 2016-12-29 7:52 ` Michal Hocko 2016-12-30 1:48 ` Minchan Kim 2016-12-30 1:48 ` Minchan Kim 2016-12-30 9:26 ` Michal Hocko 2016-12-30 9:26 ` Michal Hocko 2016-12-30 9:38 ` Hillf Danton 2016-12-30 9:38 ` Hillf Danton 2016-12-30 16:04 ` Minchan Kim 2016-12-30 16:04 ` Minchan Kim 2016-12-30 16:37 ` Michal Hocko 2016-12-30 16:37 ` Michal Hocko 2016-12-30 17:30 ` Michal Hocko 2016-12-30 17:30 ` Michal Hocko 2017-01-03 5:03 ` Minchan Kim 2017-01-03 5:03 ` Minchan Kim 2017-01-03 8:21 ` Michal Hocko 2017-01-03 8:21 ` Michal Hocko 2017-01-04 5:07 ` Minchan Kim 2017-01-04 5:07 ` Minchan Kim 2017-01-04 7:28 ` Vlastimil Babka 2017-01-04 7:28 ` Vlastimil Babka 2017-01-04 7:50 ` Michal Hocko 2017-01-04 7:50 ` Michal Hocko 2016-12-29 7:44 ` Hillf Danton 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 2016-12-28 15:30 ` Michal Hocko 2016-12-29 5:53 ` Minchan Kim 2016-12-29 5:53 ` Minchan Kim 2016-12-29 7:49 ` Hillf Danton 2016-12-29 7:49 ` Hillf Danton 2017-01-03 17:21 ` Vlastimil Babka 2017-01-03 17:21 ` Vlastimil Babka 2017-01-03 20:43 ` Michal Hocko 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 15:30 ` Michal Hocko 2016-12-28 15:50 ` Nikolay Borisov 2016-12-28 15:50 ` Nikolay Borisov 2016-12-28 16:00 ` Michal Hocko 2016-12-28 16:00 ` Michal Hocko 2016-12-28 16:40 ` Nikolay Borisov 2016-12-28 16:40 ` Nikolay Borisov 2016-12-28 16:49 ` Michal Hocko 2016-12-28 16:49 ` Michal Hocko 2016-12-29 6:02 ` Minchan Kim 2016-12-29 6:02 ` Minchan Kim 2016-12-29 7:56 ` Michal Hocko 2016-12-29 7:56 ` Michal Hocko 2016-12-30 1:56 ` Minchan Kim 2016-12-30 1:56 ` Minchan Kim 2016-12-30 9:33 ` Michal Hocko 2016-12-30 9:33 ` Michal Hocko 2016-12-29 7:53 ` Hillf Danton 2016-12-29 7:53 ` Hillf Danton 2017-01-03 17:08 ` Vlastimil Babka 2017-01-03 17:08 ` Vlastimil Babka 2017-01-03 20:47 ` Michal Hocko 2017-01-03 20:47 ` Michal Hocko 2017-01-03 20:52 ` Michal Hocko 2017-01-03 20:52 ` Michal Hocko 2017-01-03 21:24 ` Michal Hocko 2017-01-03 21:24 ` Michal Hocko 2017-01-03 21:40 ` Vlastimil Babka 2017-01-03 21:40 ` Vlastimil Babka 2017-01-03 21:48 ` Michal Hocko 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 2016-12-28 15:30 ` Michal Hocko 2016-12-29 8:00 ` Hillf Danton 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 2016-12-28 15:30 ` Michal Hocko 2016-12-29 8:05 ` Hillf Danton 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 2016-12-28 15:30 ` Michal Hocko 2016-12-29 8:19 ` Hillf Danton 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 9:11 ` Mel Gorman 2016-12-30 9:36 ` Michal Hocko 2016-12-30 9:36 ` Michal Hocko 2016-12-30 10:20 ` Mel Gorman 2016-12-30 10:20 ` Mel Gorman 2017-01-04 10:19 [PATCH 0/7 v2] " Michal Hocko 2017-01-04 10:19 ` [PATCH 2/7] mm, vmscan: add active list aging tracepoint Michal Hocko 2017-01-04 10:19 ` Michal Hocko 2017-01-04 12:52 ` Vlastimil Babka 2017-01-04 12:52 ` Vlastimil Babka 2017-01-04 13:16 ` Michal Hocko 2017-01-04 13:16 ` Michal Hocko 2017-01-04 13:34 ` Vlastimil Babka 2017-01-04 13:34 ` Vlastimil Babka 2017-01-04 13:52 ` Michal Hocko 2017-01-04 13:52 ` Michal Hocko 2017-01-05 5:41 ` Minchan Kim 2017-01-05 5:41 ` Minchan Kim
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