From: Harlan Stenn <stenn@ntp.org>
Date: Mon, 15 Aug 2005 08:01:26 +0000 (-0400)
Subject: [Bug 477] Linux needs larger RLIM_MEMLOCK, from Cristoph Gysin
X-Git-Tag: NTP_4_2_0B_RC1~11^2~2
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a1a829f40bfb85b9bebe941f70dbc2756bb13a9a;p=thirdparty%2Fntp.git

[Bug 477] Linux needs larger RLIM_MEMLOCK, from Cristoph Gysin

bk: 43004bd6et0qsCzRlpMzJ9xxw4ciHg
---

diff --git a/ntpd/ntpd.c b/ntpd/ntpd.c
index 2f4fa00ce..dc0b82406 100644
--- a/ntpd/ntpd.c
+++ b/ntpd/ntpd.c
@@ -691,6 +691,18 @@ service_main(
 				"Cannot adjust stack limit for mlockall: %m");
 		    }
 	    }
+#  ifdef RLIMIT_MEMLOCK
+	    /*
+	     * The default RLIMIT_MEMLOCK is very low on Linux systems.
+	     * Unless we increase this limit malloc calls are likely to
+	     * fail if we drop root privlege.  To be useful the value
+	     * has to be larger than the largest ntpd resident set size.
+	     */
+	    rl.rlim_cur = rl.rlim_max = 32*1024*1024;
+	    if (setrlimit(RLIMIT_MEMLOCK, &rl) == -1) {
+	    	msyslog(LOG_ERR, "Cannot set RLIMIT_MEMLOCK: %m");
+	    }
+#  endif /* RLIMIT_MEMLOCK */
 	}
 # endif /* HAVE_SETRLIMIT */
 	/*