Messages in this thread Patch in this message | | | From | Huang Ying <> | Subject | [PATCH -V11 5/9] mm/vmscan: add page demotion counter | Date | Wed, 21 Jul 2021 14:39:22 +0800 |
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From: Yang Shi <yang.shi@linux.alibaba.com>
Account the number of demoted pages.
Add pgdemote_kswapd and pgdemote_direct VM counters showed in /proc/vmstat.
[ daveh: - __count_vm_events() a bit, and made them look at the THP size directly rather than getting data from migrate_pages() ]
Link: https://lkml.kernel.org/r/20210715055145.195411-6-ying.huang@intel.com Signed-off-by: Yang Shi <yang.shi@linux.alibaba.com> Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Signed-off-by: "Huang, Ying" <ying.huang@intel.com> Reviewed-by: Yang Shi <shy828301@gmail.com> Reviewed-by: Wei Xu <weixugc@google.com> Cc: Michal Hocko <mhocko@suse.com> Cc: Zi Yan <ziy@nvidia.com> Cc: David Rientjes <rientjes@google.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: David Hildenbrand <david@redhat.com> Cc: Oscar Salvador <osalvador@suse.de> Cc: Greg Thelen <gthelen@google.com> Cc: Keith Busch <kbusch@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> --- include/linux/vm_event_item.h | 2 ++ mm/vmscan.c | 5 +++++ mm/vmstat.c | 2 ++ 3 files changed, 9 insertions(+)
diff --git a/include/linux/vm_event_item.h b/include/linux/vm_event_item.h index ae0dd1948c2b..a185cc75ff52 100644 --- a/include/linux/vm_event_item.h +++ b/include/linux/vm_event_item.h @@ -33,6 +33,8 @@ enum vm_event_item { PGPGIN, PGPGOUT, PSWPIN, PSWPOUT, PGREUSE, PGSTEAL_KSWAPD, PGSTEAL_DIRECT, + PGDEMOTE_KSWAPD, + PGDEMOTE_DIRECT, PGSCAN_KSWAPD, PGSCAN_DIRECT, PGSCAN_DIRECT_THROTTLE, diff --git a/mm/vmscan.c b/mm/vmscan.c index 49d03b5e3c18..90fa026cfa29 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -1322,6 +1322,11 @@ static unsigned int demote_page_list(struct list_head *demote_pages, target_nid, MIGRATE_ASYNC, MR_DEMOTION, &nr_succeeded); + if (current_is_kswapd()) + __count_vm_events(PGDEMOTE_KSWAPD, nr_succeeded); + else + __count_vm_events(PGDEMOTE_DIRECT, nr_succeeded); + return nr_succeeded; } diff --git a/mm/vmstat.c b/mm/vmstat.c index 6246bab9fae2..13ff25d0d96a 100644 --- a/mm/vmstat.c +++ b/mm/vmstat.c @@ -1217,6 +1217,8 @@ const char * const vmstat_text[] = { "pgreuse", "pgsteal_kswapd", "pgsteal_direct", + "pgdemote_kswapd", + "pgdemote_direct", "pgscan_kswapd", "pgscan_direct", "pgscan_direct_throttle", -- 2.30.2
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