From 1a7dfea42049006c7faf6ff72fd1b84d0add4344 Mon Sep 17 00:00:00 2001 From: Yafang Shao Date: Fri, 8 Dec 2023 09:05:53 +0000 Subject: mbind.2: Add mode flag MPOL_F_NUMA_BALANCING In Linux Kernel 5.12, a new mode flag, MPOL_F_NUMA_BALANCING, was added to set_mempolicy() to optimize the page placement among the NUMA nodes with the NUMA balancing mechanism even if the memory of the applications is bound with MPOL_BIND. In Linux Kernel 5.15, this mode flag was extended to mbind(2). Let's also add man-page for mbind(2). It is copied from set_mempoicy(2) man-page with subtle modifications. Related kernel commits: bda420b985054a3badafef23807c4b4fa38a3dff 6d2aec9e123bb9c49cb5c7fc654f25f81e688e8c Suggested-by: "Huang, Ying" Signed-off-by: Yafang Shao Cc: "Huang, Ying" Cc: Michael Kerrisk Signed-off-by: Alejandro Colomar --- man2/mbind.2 | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/man2/mbind.2 b/man2/mbind.2 index 7dd1e856a..b0e961f9c 100644 --- a/man2/mbind.2 +++ b/man2/mbind.2 @@ -124,6 +124,23 @@ The supported .I "mode flags" are: .TP +.BR MPOL_F_NUMA_BALANCING " (since Linux 5.15)" +.\" commit bda420b985054a3badafef23807c4b4fa38a3dff +.\" commit 6d2aec9e123bb9c49cb5c7fc654f25f81e688e8c +When +.I mode +is +.BR MPOL_BIND , +enable the kernel NUMA balancing for the task if it is supported by the kernel. +If the flag isn't supported by the kernel, or is used with +.I mode +other than +.BR MPOL_BIND , +\-1 is returned and +.I errno +is set to +.BR EINVAL . +.TP .BR MPOL_F_STATIC_NODES " (since Linux-2.6.26)" A nonempty .I nodemask -- cgit v1.2.3