Index: sshd.c
===================================================================
--- sshd.c
+++ sshd.c
@@ -46,6 +46,7 @@
 
 #include <sys/types.h>
 #include <sys/ioctl.h>
+#include <sys/mman.h>
 #include <sys/socket.h>
 #ifdef HAVE_SYS_STAT_H
 # include <sys/stat.h>
@@ -2026,6 +2027,10 @@
 	/* Reinitialize the log (because of the fork above). */
 	log_init(__progname, options.log_level, options.log_facility, log_stderr);
 
+	/* Avoid killing the process in high-pressure swapping environments. */
+	if (!inetd_flag && madvise(NULL, 0, MADV_PROTECT) != 0)
+		debug("madvise(): %.200s", strerror(errno));
+
 	/*
 	 * Chdir to the root directory so that the current disk can be
 	 * unmounted if desired.