From: Rik van Riel <riel@redhat.com>
To: linux-kernel@vger.kernel.org
Cc: Andrew Morton <akpm@linux-foundation.org>,
Lee Schermerhorn <lee.schermerhorn@hp.com>,
Kosaki Motohiro <kosaki.motohiro@jp.fujitsu.com>
Subject: [patch 12/14] Non-reclaimable page statistics
Date: Fri, 16 May 2008 14:32:19 -0400 [thread overview]
Message-ID: <20080516183224.741229415@redhat.com> (raw)
In-Reply-To: 20080516183207.361608893@redhat.com
[-- Attachment #1: rvr-12-lts-noreclaim-non-reclaimable-page-statistics.patch --]
[-- Type: text/plain, Size: 5263 bytes --]
From: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
Report non-reclaimable pages per zone and system wide.
Note: may want to track/report some specific reasons for
nonreclaimability for deciding when to splice the noreclaim
lists back to the normal lru. That will be tricky,
especially in shrink_active_list(), where we'd need someplace
to save the per page reason for non-reclaimability until the
pages are dumped back onto the noreclaim list from the pagevec.
Note: my tests indicate that NR_NORECLAIM and probably the
other LRU stats aren't being maintained properly--especially
with large amounts of mlocked memory and the mlock patch in
this series installed. Can't be sure of this, as I don't
know why the pages are on the noreclaim list. Needs further
investigation.
Signed-off-by: Lee Schermerhorn <lee.schermerhorn@hp.com>
Signed-off-by: Rik van Riel <riel@redhat.com>
---
V2 -> V3:
+ rebase to 23-mm1 atop RvR's split LRU series
V1 -> V2:
no changes
drivers/base/node.c | 6 ++++++
fs/proc/proc_misc.c | 6 ++++++
mm/page_alloc.c | 16 +++++++++++++++-
mm/vmstat.c | 3 +++
4 files changed, 30 insertions(+), 1 deletion(-)
Index: linux-2.6.26-rc2-mm1/mm/page_alloc.c
===================================================================
--- linux-2.6.26-rc2-mm1.orig/mm/page_alloc.c 2008-05-16 14:05:09.000000000 -0400
+++ linux-2.6.26-rc2-mm1/mm/page_alloc.c 2008-05-16 14:05:13.000000000 -0400
@@ -1918,12 +1918,20 @@ void show_free_areas(void)
}
printk("Active_anon:%lu active_file:%lu inactive_anon%lu\n"
- " inactive_file:%lu dirty:%lu writeback:%lu unstable:%lu\n"
+ " inactive_file:%lu"
+//TODO: check/adjust line lengths
+#ifdef CONFIG_NORECLAIM_LRU
+ " noreclaim:%lu"
+#endif
+ " dirty:%lu writeback:%lu unstable:%lu\n"
" free:%lu slab:%lu mapped:%lu pagetables:%lu bounce:%lu\n",
global_page_state(NR_ACTIVE_ANON),
global_page_state(NR_ACTIVE_FILE),
global_page_state(NR_INACTIVE_ANON),
global_page_state(NR_INACTIVE_FILE),
+#ifdef CONFIG_NORECLAIM_LRU
+ global_page_state(NR_NORECLAIM),
+#endif
global_page_state(NR_FILE_DIRTY),
global_page_state(NR_WRITEBACK),
global_page_state(NR_UNSTABLE_NFS),
@@ -1950,6 +1958,9 @@ void show_free_areas(void)
" inactive_anon:%lukB"
" active_file:%lukB"
" inactive_file:%lukB"
+#ifdef CONFIG_NORECLAIM_LRU
+ " noreclaim:%lukB"
+#endif
" present:%lukB"
" pages_scanned:%lu"
" all_unreclaimable? %s"
@@ -1963,6 +1974,9 @@ void show_free_areas(void)
K(zone_page_state(zone, NR_INACTIVE_ANON)),
K(zone_page_state(zone, NR_ACTIVE_FILE)),
K(zone_page_state(zone, NR_INACTIVE_FILE)),
+#ifdef CONFIG_NORECLAIM_LRU
+ K(zone_page_state(zone, NR_NORECLAIM)),
+#endif
K(zone->present_pages),
zone->pages_scanned,
(zone_is_all_unreclaimable(zone) ? "yes" : "no")
Index: linux-2.6.26-rc2-mm1/mm/vmstat.c
===================================================================
--- linux-2.6.26-rc2-mm1.orig/mm/vmstat.c 2008-05-16 14:03:56.000000000 -0400
+++ linux-2.6.26-rc2-mm1/mm/vmstat.c 2008-05-16 14:05:13.000000000 -0400
@@ -699,6 +699,9 @@ static const char * const vmstat_text[]
"nr_active_anon",
"nr_inactive_file",
"nr_active_file",
+#ifdef CONFIG_NORECLAIM_LRU
+ "nr_noreclaim",
+#endif
"nr_anon_pages",
"nr_mapped",
"nr_file_pages",
Index: linux-2.6.26-rc2-mm1/drivers/base/node.c
===================================================================
--- linux-2.6.26-rc2-mm1.orig/drivers/base/node.c 2008-05-16 13:53:09.000000000 -0400
+++ linux-2.6.26-rc2-mm1/drivers/base/node.c 2008-05-16 14:05:13.000000000 -0400
@@ -67,6 +67,9 @@ static ssize_t node_read_meminfo(struct
"Node %d Inactive(anon): %8lu kB\n"
"Node %d Active(file): %8lu kB\n"
"Node %d Inactive(file): %8lu kB\n"
+#ifdef CONFIG_NORECLAIM_LRU
+ "Node %d Noreclaim: %8lu kB\n"
+#endif
#ifdef CONFIG_HIGHMEM
"Node %d HighTotal: %8lu kB\n"
"Node %d HighFree: %8lu kB\n"
@@ -96,6 +99,9 @@ static ssize_t node_read_meminfo(struct
nid, node_page_state(nid, NR_INACTIVE_ANON),
nid, node_page_state(nid, NR_ACTIVE_FILE),
nid, node_page_state(nid, NR_INACTIVE_FILE),
+#ifdef CONFIG_NORECLAIM_LRU
+ nid, node_page_state(nid, NR_NORECLAIM),
+#endif
#ifdef CONFIG_HIGHMEM
nid, K(i.totalhigh),
nid, K(i.freehigh),
Index: linux-2.6.26-rc2-mm1/fs/proc/proc_misc.c
===================================================================
--- linux-2.6.26-rc2-mm1.orig/fs/proc/proc_misc.c 2008-05-16 13:53:09.000000000 -0400
+++ linux-2.6.26-rc2-mm1/fs/proc/proc_misc.c 2008-05-16 14:05:13.000000000 -0400
@@ -174,6 +174,9 @@ static int meminfo_read_proc(char *page,
"Inactive(anon): %8lu kB\n"
"Active(file): %8lu kB\n"
"Inactive(file): %8lu kB\n"
+#ifdef CONFIG_NORECLAIM_LRU
+ "Noreclaim: %8lu kB\n"
+#endif
#ifdef CONFIG_HIGHMEM
"HighTotal: %8lu kB\n"
"HighFree: %8lu kB\n"
@@ -209,6 +212,9 @@ static int meminfo_read_proc(char *page,
K(inactive_anon),
K(active_file),
K(inactive_file),
+#ifdef CONFIG_NORECLAIM_LRU
+ K(global_page_state(NR_NORECLAIM)),
+#endif
#ifdef CONFIG_HIGHMEM
K(i.totalhigh),
K(i.freehigh),
--
All Rights Reversed
next prev parent reply other threads:[~2008-05-16 18:48 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-05-16 18:32 [patch 00/14] VM pageout scalability improvements (V7) Rik van Riel
2008-05-16 18:32 ` [patch 01/14] move isolate_lru_page() to vmscan.c Rik van Riel
2008-05-16 18:32 ` [patch 02/14] Use an indexed array for LRU variables Rik van Riel
2008-05-16 18:32 ` [patch 03/14] use an array for the LRU pagevecs Rik van Riel
2008-05-16 18:32 ` [patch 04/14] free swap space on swap-in/activation Rik van Riel
2008-05-19 12:35 ` MinChan Kim
2008-05-19 16:01 ` Rik van Riel
2008-05-16 18:32 ` [patch 05/14] define page_file_cache() function Rik van Riel
2008-05-16 18:32 ` [patch 06/14] split LRU lists into anon & file sets Rik van Riel
2008-05-16 18:32 ` [patch 07/14] second chance replacement for anonymous pages Rik van Riel
2008-05-16 18:32 ` [patch 08/14] add some sanity checks to get_scan_ratio Rik van Riel
2008-05-16 18:32 ` [patch 09/14] add newly swapped in pages to the inactive list Rik van Riel
2008-05-16 18:32 ` [patch 10/14] more aggressively use lumpy reclaim Rik van Riel
2008-05-16 18:32 ` [patch 11/14] No Reclaim LRU Infrastructure Rik van Riel
2008-05-16 18:32 ` Rik van Riel [this message]
2008-05-16 18:32 ` [patch 13/14] ramfs pages are non-reclaimable Rik van Riel
2008-05-16 18:32 ` [patch 14/14] SHM_LOCKED pages are nonreclaimable Rik van Riel
2008-05-17 5:51 ` [patch 00/14] VM pageout scalability improvements (V7) MinChan Kim
2008-05-17 13:35 ` Rik van Riel
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