This adds two new flags to the prctl documentation: PR_SET_MEMORY_MERGE and PR_GET_MEMORY_MERGE. The flags allow to enable KSM (kernel samepage merging) at the process level and query is state. The "mm: process/cgroup ksm support" patch series has been posted to the mm mailing list and it enables this feature. Signed-off-by: Stefan Roesch <shr@xxxxxxxxxxxx> --- man2/prctl.2 | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/man2/prctl.2 b/man2/prctl.2 index 2212331af0e4..d10334484bf7 100644 --- a/man2/prctl.2 +++ b/man2/prctl.2 @@ -591,6 +591,26 @@ the current per-process machine check kill policy. All unused .BR prctl () arguments must be zero. +.\" prctl PR_SET_MEMORY_MERGE +.TP +.BR PR_SET_MEMORY_MERGE " (since Linux 6.4)" +Enable the KSM (kernel samepage merging) feature for this process. If +.I arg2 +is nonzero, KSM gets enabled for this process. Child processes will inherit the +setting. +.IP +The calling process must have the +.B CAP_SYS_RESOURCE +capability. +.\" prctl PR_GET_MEMORY_MERGE +.TP +.BR PR_GET_MEMORY_MERGE " (since Linux 6.4)" +Return (as the function result) if KSM (kernel samepage merging) has been +enabled for this process. All unused prctl() arguments must be NULL. +.IP +The calling process must have the +.B CAP_SYS_RESOURCE +capability. .\" prctl PR_SET_MM .TP .BR PR_SET_MM " (since Linux 3.3)" base-commit: 53a7e5dfc3554a2e8dbdfdc4504e99652e1d6382 -- 2.30.2
