From: Minchan Kim <minchan@kernel.org> To: Michal Hocko <mhocko@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>, Michal Hocko <mhocko@suse.com> Subject: Re: [PATCH 2/7] mm, vmscan: add active list aging tracepoint Date: Thu, 29 Dec 2016 14:33:59 +0900 [thread overview] Message-ID: <20161229053359.GA1815@bbox> (raw) In-Reply-To: <20161228153032.10821-3-mhocko@kernel.org> 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? Also, look at minor thing below. Thanks. > + > + TP_STRUCT__entry( > + __field(int, nid) > + __field(unsigned long, nr_scanned) > + __field(unsigned long, nr_freed) > + __field(unsigned long, nr_unevictable) > + __field(unsigned long, nr_deactivated) > + __field(unsigned long, nr_rotated) > + __field(int, priority) > + __field(int, reclaim_flags) > + ), > + > + TP_fast_assign( > + __entry->nid = nid; > + __entry->nr_scanned = nr_scanned; > + __entry->nr_freed = nr_freed; > + __entry->nr_unevictable = nr_unevictable; > + __entry->nr_deactivated = nr_deactivated; > + __entry->nr_rotated = nr_rotated; > + __entry->priority = priority; > + __entry->reclaim_flags = trace_shrink_flags(file); > + ), > + > + TP_printk("nid=%d nr_scanned=%ld nr_freed=%ld nr_unevictable=%ld nr_deactivated=%ld nr_rotated=%ld priority=%d flags=%s", > + __entry->nid, > + __entry->nr_scanned, __entry->nr_freed, __entry->nr_unevictable, > + __entry->nr_deactivated, __entry->nr_rotated, > + __entry->priority, > + show_reclaim_flags(__entry->reclaim_flags)) > +); > + > #endif /* _TRACE_VMSCAN_H */ > > /* This part must be outside protection */ > diff --git a/mm/page_alloc.c b/mm/page_alloc.c > index 1c24112308d6..77d204660857 100644 > --- a/mm/page_alloc.c > +++ b/mm/page_alloc.c > @@ -2487,14 +2487,18 @@ void free_hot_cold_page(struct page *page, bool cold) > /* > * Free a list of 0-order pages > */ > -void free_hot_cold_page_list(struct list_head *list, bool cold) > +int free_hot_cold_page_list(struct list_head *list, bool cold) > { > struct page *page, *next; > + int ret = 0; > > list_for_each_entry_safe(page, next, list, lru) { > trace_mm_page_free_batched(page, cold); > free_hot_cold_page(page, cold); > + ret++; > } > + > + return ret; > } > > /* > diff --git a/mm/vmscan.c b/mm/vmscan.c > index c4abf08861d2..2302a1a58c6e 100644 > --- a/mm/vmscan.c > +++ b/mm/vmscan.c > @@ -1846,9 +1846,11 @@ shrink_inactive_list(unsigned long nr_to_scan, struct lruvec *lruvec, > * > * The downside is that we have to touch page->_refcount against each page. > * But we had to alter page->flags anyway. > + * > + * Returns the number of pages moved to the given lru. > */ > > -static void move_active_pages_to_lru(struct lruvec *lruvec, > +static int move_active_pages_to_lru(struct lruvec *lruvec, > struct list_head *list, > struct list_head *pages_to_free, > enum lru_list lru) > @@ -1857,6 +1859,7 @@ static void move_active_pages_to_lru(struct lruvec *lruvec, > unsigned long pgmoved = 0; > struct page *page; > int nr_pages; > + int nr_moved = 0; > > while (!list_empty(list)) { > page = lru_to_page(list); > @@ -1882,11 +1885,15 @@ static void move_active_pages_to_lru(struct lruvec *lruvec, > spin_lock_irq(&pgdat->lru_lock); > } else > list_add(&page->lru, pages_to_free); > + } else { > + nr_moved++; > } > } > > if (!is_active_lru(lru)) > __count_vm_events(PGDEACTIVATE, pgmoved); > + > + return nr_moved; > } > > static void shrink_active_list(unsigned long nr_to_scan, > @@ -1902,7 +1909,8 @@ static void shrink_active_list(unsigned long nr_to_scan, > LIST_HEAD(l_inactive); > struct page *page; > struct zone_reclaim_stat *reclaim_stat = &lruvec->reclaim_stat; > - unsigned long nr_rotated = 0; > + unsigned long nr_rotated = 0, nr_unevictable = 0; > + unsigned long nr_freed, nr_deactivate, nr_activate; > isolate_mode_t isolate_mode = 0; > int file = is_file_lru(lru); > struct pglist_data *pgdat = lruvec_pgdat(lruvec); > @@ -1935,6 +1943,7 @@ static void shrink_active_list(unsigned long nr_to_scan, > > if (unlikely(!page_evictable(page))) { > putback_lru_page(page); > + nr_unevictable++; > continue; > } > > @@ -1980,13 +1989,16 @@ static void shrink_active_list(unsigned long nr_to_scan, > */ > reclaim_stat->recent_rotated[file] += nr_rotated; > > - 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? > + nr_deactivate = move_active_pages_to_lru(lruvec, &l_inactive, &l_hold, lru - LRU_ACTIVE); > __mod_node_page_state(pgdat, NR_ISOLATED_ANON + file, -nr_taken); > spin_unlock_irq(&pgdat->lru_lock); > > mem_cgroup_uncharge_list(&l_hold); > - free_hot_cold_page_list(&l_hold, true); > + nr_freed = free_hot_cold_page_list(&l_hold, true); > + trace_mm_vmscan_lru_shrink_active(pgdat->node_id, nr_scanned, nr_freed, > + nr_unevictable, nr_deactivate, nr_rotated, > + sc->priority, file); > } > > /* > -- > 2.10.2 > > -- > 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>
WARNING: multiple messages have this Message-ID (diff)
From: Minchan Kim <minchan@kernel.org> To: Michal Hocko <mhocko@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>, Michal Hocko <mhocko@suse.com> Subject: Re: [PATCH 2/7] mm, vmscan: add active list aging tracepoint Date: Thu, 29 Dec 2016 14:33:59 +0900 [thread overview] Message-ID: <20161229053359.GA1815@bbox> (raw) In-Reply-To: <20161228153032.10821-3-mhocko@kernel.org> 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? Also, look at minor thing below. Thanks. > + > + TP_STRUCT__entry( > + __field(int, nid) > + __field(unsigned long, nr_scanned) > + __field(unsigned long, nr_freed) > + __field(unsigned long, nr_unevictable) > + __field(unsigned long, nr_deactivated) > + __field(unsigned long, nr_rotated) > + __field(int, priority) > + __field(int, reclaim_flags) > + ), > + > + TP_fast_assign( > + __entry->nid = nid; > + __entry->nr_scanned = nr_scanned; > + __entry->nr_freed = nr_freed; > + __entry->nr_unevictable = nr_unevictable; > + __entry->nr_deactivated = nr_deactivated; > + __entry->nr_rotated = nr_rotated; > + __entry->priority = priority; > + __entry->reclaim_flags = trace_shrink_flags(file); > + ), > + > + TP_printk("nid=%d nr_scanned=%ld nr_freed=%ld nr_unevictable=%ld nr_deactivated=%ld nr_rotated=%ld priority=%d flags=%s", > + __entry->nid, > + __entry->nr_scanned, __entry->nr_freed, __entry->nr_unevictable, > + __entry->nr_deactivated, __entry->nr_rotated, > + __entry->priority, > + show_reclaim_flags(__entry->reclaim_flags)) > +); > + > #endif /* _TRACE_VMSCAN_H */ > > /* This part must be outside protection */ > diff --git a/mm/page_alloc.c b/mm/page_alloc.c > index 1c24112308d6..77d204660857 100644 > --- a/mm/page_alloc.c > +++ b/mm/page_alloc.c > @@ -2487,14 +2487,18 @@ void free_hot_cold_page(struct page *page, bool cold) > /* > * Free a list of 0-order pages > */ > -void free_hot_cold_page_list(struct list_head *list, bool cold) > +int free_hot_cold_page_list(struct list_head *list, bool cold) > { > struct page *page, *next; > + int ret = 0; > > list_for_each_entry_safe(page, next, list, lru) { > trace_mm_page_free_batched(page, cold); > free_hot_cold_page(page, cold); > + ret++; > } > + > + return ret; > } > > /* > diff --git a/mm/vmscan.c b/mm/vmscan.c > index c4abf08861d2..2302a1a58c6e 100644 > --- a/mm/vmscan.c > +++ b/mm/vmscan.c > @@ -1846,9 +1846,11 @@ shrink_inactive_list(unsigned long nr_to_scan, struct lruvec *lruvec, > * > * The downside is that we have to touch page->_refcount against each page. > * But we had to alter page->flags anyway. > + * > + * Returns the number of pages moved to the given lru. > */ > > -static void move_active_pages_to_lru(struct lruvec *lruvec, > +static int move_active_pages_to_lru(struct lruvec *lruvec, > struct list_head *list, > struct list_head *pages_to_free, > enum lru_list lru) > @@ -1857,6 +1859,7 @@ static void move_active_pages_to_lru(struct lruvec *lruvec, > unsigned long pgmoved = 0; > struct page *page; > int nr_pages; > + int nr_moved = 0; > > while (!list_empty(list)) { > page = lru_to_page(list); > @@ -1882,11 +1885,15 @@ static void move_active_pages_to_lru(struct lruvec *lruvec, > spin_lock_irq(&pgdat->lru_lock); > } else > list_add(&page->lru, pages_to_free); > + } else { > + nr_moved++; > } > } > > if (!is_active_lru(lru)) > __count_vm_events(PGDEACTIVATE, pgmoved); > + > + return nr_moved; > } > > static void shrink_active_list(unsigned long nr_to_scan, > @@ -1902,7 +1909,8 @@ static void shrink_active_list(unsigned long nr_to_scan, > LIST_HEAD(l_inactive); > struct page *page; > struct zone_reclaim_stat *reclaim_stat = &lruvec->reclaim_stat; > - unsigned long nr_rotated = 0; > + unsigned long nr_rotated = 0, nr_unevictable = 0; > + unsigned long nr_freed, nr_deactivate, nr_activate; > isolate_mode_t isolate_mode = 0; > int file = is_file_lru(lru); > struct pglist_data *pgdat = lruvec_pgdat(lruvec); > @@ -1935,6 +1943,7 @@ static void shrink_active_list(unsigned long nr_to_scan, > > if (unlikely(!page_evictable(page))) { > putback_lru_page(page); > + nr_unevictable++; > continue; > } > > @@ -1980,13 +1989,16 @@ static void shrink_active_list(unsigned long nr_to_scan, > */ > reclaim_stat->recent_rotated[file] += nr_rotated; > > - 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? > + nr_deactivate = move_active_pages_to_lru(lruvec, &l_inactive, &l_hold, lru - LRU_ACTIVE); > __mod_node_page_state(pgdat, NR_ISOLATED_ANON + file, -nr_taken); > spin_unlock_irq(&pgdat->lru_lock); > > mem_cgroup_uncharge_list(&l_hold); > - free_hot_cold_page_list(&l_hold, true); > + nr_freed = free_hot_cold_page_list(&l_hold, true); > + trace_mm_vmscan_lru_shrink_active(pgdat->node_id, nr_scanned, nr_freed, > + nr_unevictable, nr_deactivate, nr_rotated, > + sc->priority, file); > } > > /* > -- > 2.10.2 > > -- > 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> -- 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 5:34 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 [this message] 2016-12-29 5:33 ` Minchan Kim 2016-12-29 7:52 ` Michal Hocko 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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