diff options
| author | Matthew Cassell <mcassell411@gmail.com> | 2024-07-22 19:13:16 +0200 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2024-09-02 05:25:43 +0200 |
| commit | 5fe690a5946442f7f2d08448341dd621367f80bc (patch) | |
| tree | 3cd8f8b733ef989e743177e2e26c7044343a6e89 | |
| parent | Linux 6.11-rc6 (diff) | |
| download | linux-5fe690a5946442f7f2d08448341dd621367f80bc.tar.xz linux-5fe690a5946442f7f2d08448341dd621367f80bc.zip | |
mm: add node_reclaim successes to VM event counters
/proc/vmstat currently shows the number of node_reclaim() failures when
vm.zone_reclaim_mode is set appropriately. It would be convenient to have
the number of successes right next to zone_reclaim_failed (similar to
compaction and migration).
While just a trivially addition to the vmstat file. It was helpful during
benchmarking to not have to probe node_reclaim() to observe the
success/failure ratio.
Link: https://lkml.kernel.org/r/20240722171316.7517-1-mcassell411@gmail.com
Signed-off-by: Matthew Cassell <mcassell411@gmail.com>
Cc: Domenico Cerasuolo <cerasuolodomenico@gmail.com>
Cc: "Huang, Ying" <ying.huang@intel.com>
Cc: Li Zhijian <lizhijian@fujitsu.com>
Cc: Yosry Ahmed <yosryahmed@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| -rw-r--r-- | include/linux/vm_event_item.h | 1 | ||||
| -rw-r--r-- | mm/vmscan.c | 4 | ||||
| -rw-r--r-- | mm/vmstat.c | 1 |
3 files changed, 5 insertions, 1 deletions
diff --git a/include/linux/vm_event_item.h b/include/linux/vm_event_item.h index 747943bc8cc2..6fff8ed3b1fd 100644 --- a/include/linux/vm_event_item.h +++ b/include/linux/vm_event_item.h @@ -50,6 +50,7 @@ enum vm_event_item { PGPGIN, PGPGOUT, PSWPIN, PSWPOUT, PGSTEAL_ANON, PGSTEAL_FILE, #ifdef CONFIG_NUMA + PGSCAN_ZONE_RECLAIM_SUCCESS, PGSCAN_ZONE_RECLAIM_FAILED, #endif PGINODESTEAL, SLABS_SCANNED, KSWAPD_INODESTEAL, diff --git a/mm/vmscan.c b/mm/vmscan.c index cfa839284b92..c9682c8a1d75 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -7539,7 +7539,9 @@ int node_reclaim(struct pglist_data *pgdat, gfp_t gfp_mask, unsigned int order) ret = __node_reclaim(pgdat, gfp_mask, order); clear_bit(PGDAT_RECLAIM_LOCKED, &pgdat->flags); - if (!ret) + if (ret) + count_vm_event(PGSCAN_ZONE_RECLAIM_SUCCESS); + else count_vm_event(PGSCAN_ZONE_RECLAIM_FAILED); return ret; diff --git a/mm/vmstat.c b/mm/vmstat.c index e875f2a4915f..1ac2a569b6cf 100644 --- a/mm/vmstat.c +++ b/mm/vmstat.c @@ -1314,6 +1314,7 @@ const char * const vmstat_text[] = { "pgsteal_file", #ifdef CONFIG_NUMA + "zone_reclaim_success", "zone_reclaim_failed", #endif "pginodesteal", |