The patch titled
Subject: mm: move recent_rotated pages calculation to shrink_inactive_list()
has been added to the -mm tree. Its filename is
mm-move-recent_rotated-pages-calculation-to-shrink_inactive_list.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-move-recent_rotated-pages-calculation-to-shrink_inactive_list.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-move-recent_rotated-pages-calculation-to-shrink_inactive_list.patch
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------------------------------------------------------
From: Kirill Tkhai <ktkhai@xxxxxxxxxxxxx>
Subject: mm: move recent_rotated pages calculation to shrink_inactive_list()
Patch series "mm: Generalize putback functions"]
putback_inactive_pages() and move_active_pages_to_lru() are almost
similar, so this patchset merges them ina single function.
This patch (of 4):
The patch moves the calculation from putback_inactive_pages() to
shrink_inactive_list(). This makes putback_inactive_pages() looking more
similar to move_active_pages_to_lru().
To do that, we account activated pages in reclaim_stat::nr_activate.
Since a page may change its LRU type from anon to file cache inside
shrink_page_list() (see ClearPageSwapBacked()), we have to account pages
for the both types. So, nr_activate becomes an array.
Previously we used nr_activate to account PGACTIVATE events, but now we
account them into pgactivate variable (since they are about number of
pages in general, not about sum of hpage_nr_pages).
Link: http://lkml.kernel.org/r/155290127956.31489.3393586616054413298.stgit@localhost.localdomain
Signed-off-by: Kirill Tkhai <ktkhai@xxxxxxxxxxxxx>
Reviewed-by: Daniel Jordan <daniel.m.jordan@xxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
Documentation/trace/postprocess/trace-vmscan-postprocess.pl | 7 ++--
include/linux/vmstat.h | 2 -
include/trace/events/vmscan.h | 13 +++++---
mm/vmscan.c | 15 ++++------
4 files changed, 20 insertions(+), 17 deletions(-)
--- a/Documentation/trace/postprocess/trace-vmscan-postprocess.pl~mm-move-recent_rotated-pages-calculation-to-shrink_inactive_list
+++ a/Documentation/trace/postprocess/trace-vmscan-postprocess.pl
@@ -113,7 +113,7 @@ my $regex_kswapd_wake_default = 'nid=([0
my $regex_kswapd_sleep_default = 'nid=([0-9]*)';
my $regex_wakeup_kswapd_default = 'nid=([0-9]*) zid=([0-9]*) order=([0-9]*) gfp_flags=([A-Z_|]*)';
my $regex_lru_isolate_default = 'isolate_mode=([0-9]*) classzone_idx=([0-9]*) order=([0-9]*) nr_requested=([0-9]*) nr_scanned=([0-9]*) nr_skipped=([0-9]*) nr_taken=([0-9]*) lru=([a-z_]*)';
-my $regex_lru_shrink_inactive_default = 'nid=([0-9]*) nr_scanned=([0-9]*) nr_reclaimed=([0-9]*) nr_dirty=([0-9]*) nr_writeback=([0-9]*) nr_congested=([0-9]*) nr_immediate=([0-9]*) nr_activate=([0-9]*) nr_ref_keep=([0-9]*) nr_unmap_fail=([0-9]*) priority=([0-9]*) flags=([A-Z_|]*)';
+my $regex_lru_shrink_inactive_default = 'nid=([0-9]*) nr_scanned=([0-9]*) nr_reclaimed=([0-9]*) nr_dirty=([0-9]*) nr_writeback=([0-9]*) nr_congested=([0-9]*) nr_immediate=([0-9]*) nr_activate_anon=([0-9]*) nr_activate_file=([0-9]*) nr_ref_keep=([0-9]*) nr_unmap_fail=([0-9]*) priority=([0-9]*) flags=([A-Z_|]*)';
my $regex_lru_shrink_active_default = 'lru=([A-Z_]*) nr_scanned=([0-9]*) nr_rotated=([0-9]*) priority=([0-9]*)';
my $regex_writepage_default = 'page=([0-9a-f]*) pfn=([0-9]*) flags=([A-Z_|]*)';
@@ -212,7 +212,8 @@ $regex_lru_shrink_inactive = generate_tr
"vmscan/mm_vmscan_lru_shrink_inactive",
$regex_lru_shrink_inactive_default,
"nid", "nr_scanned", "nr_reclaimed", "nr_dirty", "nr_writeback",
- "nr_congested", "nr_immediate", "nr_activate", "nr_ref_keep",
+ "nr_congested", "nr_immediate", "nr_activate_anon",
+ "nr_activate_file", "nr_ref_keep",
"nr_unmap_fail", "priority", "flags");
$regex_lru_shrink_active = generate_traceevent_regex(
"vmscan/mm_vmscan_lru_shrink_active",
@@ -407,7 +408,7 @@ EVENT_PROCESS:
}
my $nr_reclaimed = $3;
- my $flags = $12;
+ my $flags = $13;
my $file = 0;
if ($flags =~ /RECLAIM_WB_FILE/) {
$file = 1;
--- a/include/linux/vmstat.h~mm-move-recent_rotated-pages-calculation-to-shrink_inactive_list
+++ a/include/linux/vmstat.h
@@ -26,7 +26,7 @@ struct reclaim_stat {
unsigned nr_congested;
unsigned nr_writeback;
unsigned nr_immediate;
- unsigned nr_activate;
+ unsigned nr_activate[2];
unsigned nr_ref_keep;
unsigned nr_unmap_fail;
};
--- a/include/trace/events/vmscan.h~mm-move-recent_rotated-pages-calculation-to-shrink_inactive_list
+++ a/include/trace/events/vmscan.h
@@ -359,7 +359,8 @@ TRACE_EVENT(mm_vmscan_lru_shrink_inactiv
__field(unsigned long, nr_writeback)
__field(unsigned long, nr_congested)
__field(unsigned long, nr_immediate)
- __field(unsigned long, nr_activate)
+ __field(unsigned int, nr_activate0)
+ __field(unsigned int, nr_activate1)
__field(unsigned long, nr_ref_keep)
__field(unsigned long, nr_unmap_fail)
__field(int, priority)
@@ -374,20 +375,22 @@ TRACE_EVENT(mm_vmscan_lru_shrink_inactiv
__entry->nr_writeback = stat->nr_writeback;
__entry->nr_congested = stat->nr_congested;
__entry->nr_immediate = stat->nr_immediate;
- __entry->nr_activate = stat->nr_activate;
+ __entry->nr_activate0 = stat->nr_activate[0];
+ __entry->nr_activate1 = stat->nr_activate[1];
__entry->nr_ref_keep = stat->nr_ref_keep;
__entry->nr_unmap_fail = stat->nr_unmap_fail;
__entry->priority = priority;
__entry->reclaim_flags = trace_shrink_flags(file);
),
- TP_printk("nid=%d nr_scanned=%ld nr_reclaimed=%ld nr_dirty=%ld nr_writeback=%ld nr_congested=%ld nr_immediate=%ld nr_activate=%ld nr_ref_keep=%ld nr_unmap_fail=%ld priority=%d flags=%s",
+ TP_printk("nid=%d nr_scanned=%ld nr_reclaimed=%ld nr_dirty=%ld nr_writeback=%ld nr_congested=%ld nr_immediate=%ld nr_activate_anon=%d nr_activate_file=%d nr_ref_keep=%ld nr_unmap_fail=%ld priority=%d flags=%s",
__entry->nid,
__entry->nr_scanned, __entry->nr_reclaimed,
__entry->nr_dirty, __entry->nr_writeback,
__entry->nr_congested, __entry->nr_immediate,
- __entry->nr_activate, __entry->nr_ref_keep,
- __entry->nr_unmap_fail, __entry->priority,
+ __entry->nr_activate0, __entry->nr_activate1,
+ __entry->nr_ref_keep, __entry->nr_unmap_fail,
+ __entry->priority,
show_reclaim_flags(__entry->reclaim_flags))
);
--- a/mm/vmscan.c~mm-move-recent_rotated-pages-calculation-to-shrink_inactive_list
+++ a/mm/vmscan.c
@@ -1107,6 +1107,7 @@ static unsigned long shrink_page_list(st
LIST_HEAD(ret_pages);
LIST_HEAD(free_pages);
unsigned nr_reclaimed = 0;
+ unsigned pgactivate = 0;
memset(stat, 0, sizeof(*stat));
cond_resched();
@@ -1466,8 +1467,10 @@ activate_locked:
try_to_free_swap(page);
VM_BUG_ON_PAGE(PageActive(page), page);
if (!PageMlocked(page)) {
+ int type = page_is_file_cache(page);
SetPageActive(page);
- stat->nr_activate++;
+ pgactivate++;
+ stat->nr_activate[type] += hpage_nr_pages(page);
count_memcg_page_event(page, PGACTIVATE);
}
keep_locked:
@@ -1482,7 +1485,7 @@ keep:
free_unref_page_list(&free_pages);
list_splice(&ret_pages, page_list);
- count_vm_events(PGACTIVATE, stat->nr_activate);
+ count_vm_events(PGACTIVATE, pgactivate);
return nr_reclaimed;
}
@@ -1807,7 +1810,6 @@ static int too_many_isolated(struct pgli
static noinline_for_stack void
putback_inactive_pages(struct lruvec *lruvec, struct list_head *page_list)
{
- struct zone_reclaim_stat *reclaim_stat = &lruvec->reclaim_stat;
struct pglist_data *pgdat = lruvec_pgdat(lruvec);
LIST_HEAD(pages_to_free);
@@ -1833,11 +1835,6 @@ putback_inactive_pages(struct lruvec *lr
lru = page_lru(page);
add_page_to_lru_list(page, lruvec, lru);
- if (is_active_lru(lru)) {
- int file = is_file_lru(lru);
- int numpages = hpage_nr_pages(page);
- reclaim_stat->recent_rotated[file] += numpages;
- }
if (put_page_testzero(page)) {
__ClearPageLRU(page);
__ClearPageActive(page);
@@ -1945,6 +1942,8 @@ shrink_inactive_list(unsigned long nr_to
count_memcg_events(lruvec_memcg(lruvec), PGSTEAL_DIRECT,
nr_reclaimed);
}
+ reclaim_stat->recent_rotated[0] = stat.nr_activate[0];
+ reclaim_stat->recent_rotated[1] = stat.nr_activate[1];
putback_inactive_pages(lruvec, &page_list);
_
Patches currently in -mm which might be from ktkhai@xxxxxxxxxxxxx are
mm-move-recent_rotated-pages-calculation-to-shrink_inactive_list.patch
mm-move-nr_deactivate-accounting-to-shrink_active_list.patch
mm-remove-pages_to_free-argument-of-move_active_pages_to_lru.patch
mm-generalize-putback-scan-functions.patch
