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| author | Jaewon Kim <jaewon31.kim@samsung.com> | 2024-10-11 21:49:28 +0900 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2024-11-06 20:11:13 -0800 |
| commit | 1f2d03cc535138b7cdbed0122cdc0f9e9626c6bf (patch) | |
| tree | 61b462329afbfa8bbcc1d94e5897fbe12966104f /mm/vmscan.c | |
| parent | 5708d96da20b99b4665ad72395e3727016057f70 (diff) | |
| download | linux-1f2d03cc535138b7cdbed0122cdc0f9e9626c6bf.tar.gz linux-1f2d03cc535138b7cdbed0122cdc0f9e9626c6bf.tar.bz2 linux-1f2d03cc535138b7cdbed0122cdc0f9e9626c6bf.zip | |
vmscan: add a vmscan event for reclaim_pages
reclaim_folio_list uses a dummy reclaim_stat and is not being used. To
know the memory stat, add a new trace event. This is useful how how many
pages are not reclaimed or why.
This is an example:
mm_vmscan_reclaim_pages: nid=0 nr_scanned=112 nr_reclaimed=112 nr_dirty=0 nr_writeback=0 nr_congested=0 nr_immediate=0 nr_activate_anon=0 nr_activate_file=0 nr_ref_keep=0 nr_unmap_fail=0
Currently reclaim_folio_list is only called by reclaim_pages, and
reclaim_pages is used by damon and madvise. In the latest Android,
reclaim_pages is also used by shmem to reclaim all pages in a
address_space.
[jaewon31.kim@samsung.com: use sc.nr_scanned rather than new counting]
Link: https://lkml.kernel.org/r/20241016143227.961162-1-jaewon31.kim@samsung.com
Link: https://lkml.kernel.org/r/20241011124928.1224813-1-jaewon31.kim@samsung.com
Signed-off-by: Jaewon Kim <jaewon31.kim@samsung.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Jaewon Kim <jaewon31.kim@samsung.com>
Cc: Kalesh Singh <kaleshsingh@google.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: SeongJae Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/vmscan.c')
| -rw-r--r-- | mm/vmscan.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/mm/vmscan.c b/mm/vmscan.c index 6a3c498383fa..5bec29914f12 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -2129,7 +2129,7 @@ static void shrink_active_list(unsigned long nr_to_scan, static unsigned int reclaim_folio_list(struct list_head *folio_list, struct pglist_data *pgdat) { - struct reclaim_stat dummy_stat; + struct reclaim_stat stat; unsigned int nr_reclaimed; struct folio *folio; struct scan_control sc = { @@ -2140,12 +2140,13 @@ static unsigned int reclaim_folio_list(struct list_head *folio_list, .no_demotion = 1, }; - nr_reclaimed = shrink_folio_list(folio_list, pgdat, &sc, &dummy_stat, true); + nr_reclaimed = shrink_folio_list(folio_list, pgdat, &sc, &stat, true); while (!list_empty(folio_list)) { folio = lru_to_folio(folio_list); list_del(&folio->lru); folio_putback_lru(folio); } + trace_mm_vmscan_reclaim_pages(pgdat->node_id, sc.nr_scanned, nr_reclaimed, &stat); return nr_reclaimed; } |