diff options
| author | Imran Khan <imran.f.khan@oracle.com> | 2026-06-04 21:42:45 +0800 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2026-07-28 21:12:05 -0700 |
| commit | aaa98b100ea8d779d3c4dae516dc5a267f51418b (patch) | |
| tree | 21cde205693728042d43d68bd76e00790dc0c30b | |
| parent | a4519e5b648ae77d2ecb0343317169513e03dc6a (diff) | |
| download | linux-next-aaa98b100ea8d779d3c4dae516dc5a267f51418b.tar.gz linux-next-aaa98b100ea8d779d3c4dae516dc5a267f51418b.zip | |
mm/vmstat: avoid taking zone lock in /proc/buddyinfo reads
frag_show_print() just reads zone->free_area[order].nr_free, so it can
safely do this without needing the zone->lock.
Pass nolock=true from frag_show(), so that walk_zones_in_node() can skip
the zone->lock acquisition.
Link: https://lore.kernel.org/20260604134245.1580287-1-imran.f.khan@oracle.com
Signed-off-by: Imran Khan <imran.f.khan@oracle.com>
Reviewed-by: Joshua Hahn <joshua.hahnjy@gmail.com>
Acked-by: Vlastimil Babka (SUSE) <vbabka@kernel.org>
Reviewed-by: Lorenzo Stoakes <ljs@kernel.org>
Acked-by: David Hildenbrand (Arm) <david@kernel.org>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| -rw-r--r-- | mm/vmstat.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/vmstat.c b/mm/vmstat.c index f534972f517d..7b93fbf9af09 100644 --- a/mm/vmstat.c +++ b/mm/vmstat.c @@ -1568,7 +1568,7 @@ static void frag_show_print(struct seq_file *m, pg_data_t *pgdat, static int frag_show(struct seq_file *m, void *arg) { pg_data_t *pgdat = (pg_data_t *)arg; - walk_zones_in_node(m, pgdat, true, false, frag_show_print); + walk_zones_in_node(m, pgdat, true, true, frag_show_print); return 0; } |