From: Dave Hansen <dave.hansen@linux.intel.com>
To: linux-kernel@vger.kernel.org
Cc: Dave Hansen <dave.hansen@linux.intel.com>,
yang.shi@linux.alibaba.com, rientjes@google.com,
ying.huang@intel.com, dan.j.williams@intel.com
Subject: [RFC][PATCH 6/9] mm/vmscan: add page demotion counter
Date: Tue, 18 Aug 2020 11:41:33 -0700 [thread overview]
Message-ID: <20200818184133.DCF58B5F@viggo.jf.intel.com> (raw)
In-Reply-To: <20200818184122.29C415DF@viggo.jf.intel.com>
From: Yang Shi <yang.shi@linux.alibaba.com>
Account the number of demoted pages into reclaim_state->nr_demoted.
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()
]
Signed-off-by: Yang Shi <yang.shi@linux.alibaba.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Huang Ying <ying.huang@intel.com>
Cc: Dan Williams <dan.j.williams@intel.com>
---
b/include/linux/vm_event_item.h | 2 ++
b/mm/vmscan.c | 6 ++++++
b/mm/vmstat.c | 2 ++
3 files changed, 10 insertions(+)
diff -puN include/linux/vm_event_item.h~mm-vmscan-add-page-demotion-counter include/linux/vm_event_item.h
--- a/include/linux/vm_event_item.h~mm-vmscan-add-page-demotion-counter 2020-08-18 11:36:54.062583176 -0700
+++ b/include/linux/vm_event_item.h 2020-08-18 11:36:54.070583176 -0700
@@ -32,6 +32,8 @@ enum vm_event_item { PGPGIN, PGPGOUT, PS
PGREFILL,
PGSTEAL_KSWAPD,
PGSTEAL_DIRECT,
+ PGDEMOTE_KSWAPD,
+ PGDEMOTE_DIRECT,
PGSCAN_KSWAPD,
PGSCAN_DIRECT,
PGSCAN_DIRECT_THROTTLE,
diff -puN mm/vmscan.c~mm-vmscan-add-page-demotion-counter mm/vmscan.c
--- a/mm/vmscan.c~mm-vmscan-add-page-demotion-counter 2020-08-18 11:36:54.064583176 -0700
+++ b/mm/vmscan.c 2020-08-18 11:36:54.072583176 -0700
@@ -147,6 +147,7 @@ struct scan_control {
unsigned int immediate;
unsigned int file_taken;
unsigned int taken;
+ unsigned int demoted;
} nr;
/* for recording the reclaimed slab by now */
@@ -1146,6 +1147,11 @@ static unsigned int demote_page_list(str
list_splice(ret_list, demote_pages);
}
+ if (current_is_kswapd())
+ __count_vm_events(PGDEMOTE_KSWAPD, nr_succeeded);
+ else
+ __count_vm_events(PGDEMOTE_DIRECT, nr_succeeded);
+
return nr_succeeded;
}
diff -puN mm/vmstat.c~mm-vmscan-add-page-demotion-counter mm/vmstat.c
--- a/mm/vmstat.c~mm-vmscan-add-page-demotion-counter 2020-08-18 11:36:54.067583176 -0700
+++ b/mm/vmstat.c 2020-08-18 11:36:54.072583176 -0700
@@ -1200,6 +1200,8 @@ const char * const vmstat_text[] = {
"pgrefill",
"pgsteal_kswapd",
"pgsteal_direct",
+ "pgdemote_kswapd",
+ "pgdemote_direct",
"pgscan_kswapd",
"pgscan_direct",
"pgscan_direct_throttle",
_
next prev parent reply other threads:[~2020-08-18 18:48 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-18 18:41 [RFC][PATCH 0/9] [v3] Migrate Pages in lieu of discard Dave Hansen
2020-08-18 18:41 ` [RFC][PATCH 1/9] mm/numa: node demotion data structure and lookup Dave Hansen
2020-08-18 18:41 ` [RFC][PATCH 2/9] mm/numa: automatically generate node migration order Dave Hansen
2020-08-20 21:57 ` Yang Shi
2020-08-18 18:41 ` [RFC][PATCH 3/9] mm/migrate: update migration order during on hotplug events Dave Hansen
2020-08-20 22:07 ` Yang Shi
2020-08-18 18:41 ` [RFC][PATCH 4/9] mm/migrate: make migrate_pages() return nr_succeeded Dave Hansen
2020-09-17 1:25 ` Huang, Ying
2020-08-18 18:41 ` [RFC][PATCH 5/9] mm/migrate: demote pages during reclaim Dave Hansen
2020-08-20 8:06 ` Huang, Ying
2020-08-20 15:21 ` Dave Hansen
2020-08-20 16:26 ` Yang Shi
2020-08-21 0:57 ` Huang, Ying
2020-08-21 16:17 ` Yang Shi
2020-08-20 22:42 ` Yang Shi
2020-08-18 18:41 ` Dave Hansen [this message]
2020-08-20 22:26 ` [RFC][PATCH 6/9] mm/vmscan: add page demotion counter Yang Shi
2020-08-20 23:58 ` Yang Shi
2020-08-20 22:56 ` Yang Shi
2020-08-18 18:41 ` [RFC][PATCH 7/9] mm/vmscan: Consider anonymous pages without swap Dave Hansen
2020-08-18 18:41 ` [RFC][PATCH 8/9] mm/vmscan: never demote for memcg reclaim Dave Hansen
2020-08-20 22:50 ` Yang Shi
2020-08-18 18:41 ` [RFC][PATCH 9/9] mm/migrate: new zone_reclaim_mode to enable reclaim migration Dave Hansen
2020-08-20 0:47 ` [RFC][PATCH 0/9] [v3] Migrate Pages in lieu of discard Yang Shi
2020-08-24 22:36 ` Keith Busch
2020-10-07 16:17 [RFC][PATCH 0/9] [v4][RESEND] " Dave Hansen
2020-10-07 16:17 ` [RFC][PATCH 6/9] mm/vmscan: add page demotion counter Dave Hansen
2020-10-19 7:37 ` Huang, Ying
2020-10-27 16:41 ` Yang Shi
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