diff --git a/man2/mremap.2 b/man2/mremap.2
index f82f39d7e..c3055e10d 100644
--- a/man2/mremap.2
+++ b/man2/mremap.2
@@ -145,9 +145,8 @@ The
 .BR MREMAP_DONTUNMAP
 flag may be used to atomically move a mapping while leaving the source
 mapped.
-Possible applications for this behavior include garbage collection and
-non-cooperative
-.BR userfaultfd (2).
+See NOTES for some possible applications of
+.BR MREMAP_DONTUNMAP .
 .PP
 If the memory segment specified by
 .I old_address
@@ -305,6 +304,33 @@ and the prototype for
 did not allow for the
 .I new_address
 argument.
+.\"
+.SS MREMAP_DONTUNMAP use cases
+Possible applications for
+.BR MREMAP_DONTUNMAP
+include:
+.IP * 3
+Non-cooperative
+.BR userfaultfd (2):
+an application can yank out a virtual address range using
+.BR MREMAP_DONTUNMAP
+and then employ a
+.BR userfaultfd (2)
+handler to handle the page faults that subsequently occur
+as other threads in the process touch pages in the yanked range.
+.IP *
+Garbage collection:
+.BR MREMAP_DONTUNMAP
+can be used in conjunction with
+.BR userfaultfd (2)
+to implement garbage collection algorithms (e.g., in a Java virtual machine).
+Such an implementation can be cheaper (and simpler)
+than conventional garbage collection techniques that involve
+marking pages with protection
+.BR PROT_NONE
+in conjunction with the of a
+.BR SIGSEGV
+handler to catch accesses to those pages.
 .SH BUGS
 Before Linux 4.14,
 if