mbind.2: Clarify MPOL_MF_MOVE with MPOL_INTERLEAVE policy

There was user confusion about specifying MPOL_MF_MOVE* with
MPOL_INTERLEAVE policy [1].  Add clarification.

[1] https://lore.kernel.org/linux-mm/20230501185836.GA85110@monkey/

Signed-off-by: Mike Kravetz <mike.kravetz@oracle.com>
Signed-off-by: Alejandro Colomar <alx@kernel.org>

diff --git a/man2/mbind.2 b/man2/mbind.2
index d540bbe232f7586ed7a4ab56d241a1f11001f47f..73ca95efeb8a4d5b5591190c99198aa83ee976be 100644 (file)
--- a/man2/mbind.2
+++ b/man2/mbind.2
@@ -311,6 +311,11 @@ If
 is also specified, then the call fails with the error
 .B EIO
 if some pages could not be moved.
+If the
+.B MPOL_INTERLEAVE
+policy was specified,
+pages already residing on the specified nodes
+will not be moved such that they are interleaved.
 .PP
 If
 .B MPOL_MF_MOVE_ALL
@@ -326,6 +331,11 @@ If
 is also specified, then the call fails with the error
 .B EIO
 if some pages could not be moved.
+If the
+.B MPOL_INTERLEAVE
+policy was specified,
+pages already residing on the specified nodes
+will not be moved such that they are interleaved.
 .\" ---------------------------------------------------------------
 .SH RETURN VALUE
 On success,