MPOL_F_STATIC_NODES, MPOL_F_RELATIVE_NODES, and MPOL_F_NUMA_BALANCING are
mode flags applicable to both set_mempolicy(2) and mbind(2) system calls.
It's worth noting that MPOL_F_NUMA_BALANCING was initially introduced in
commit bda420b98505 ("numa balancing: migrate on fault among multiple bound
nodes") exclusively for set_mempolicy(2). However, it was later made a
shared flag for both set_mempolicy(2) and mbind(2) following
commit 6d2aec9e123b ("mm/mempolicy: do not allow illegal
MPOL_F_NUMA_BALANCING | MPOL_LOCAL in mbind()").
This revised version aims to clarify the details regarding the mode flags.
Signed-off-by: Yafang Shao <laoar.shao@xxxxxxxxx>
Cc: Eric Dumazet <edumazet@xxxxxxxxxx>
Cc: "Huang, Ying" <ying.huang@xxxxxxxxx>
---
include/uapi/linux/mempolicy.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/uapi/linux/mempolicy.h b/include/uapi/linux/mempolicy.h
index a8963f7ef4c2..afed4a45f5b9 100644
--- a/include/uapi/linux/mempolicy.h
+++ b/include/uapi/linux/mempolicy.h
@@ -26,7 +26,7 @@ enum {
MPOL_MAX, /* always last member of enum */
};
-/* Flags for set_mempolicy */
+/* Flags for set_mempolicy() or mbind() */
#define MPOL_F_STATIC_NODES (1 << 15)
#define MPOL_F_RELATIVE_NODES (1 << 14)
#define MPOL_F_NUMA_BALANCING (1 << 13) /* Optimize with NUMA balancing if possible */
--
2.30.1 (Apple Git-130)
