From c441f58dedc465f59060296815a0bc7f9aeb743f Mon Sep 17 00:00:00 2001
From: todd stecher <todd.stecher@gmail.com>
Date: Tue, 17 Feb 2009 16:16:35 -0800
Subject: S3: Allow SMBD processes to survive in low memory condidtions

This commit adds a configure argument which allows for setting MADV_PROTECT
in the madvise() API.  With this enabled the kernel won't kill SMBD when
it's running low on memory.
---
 source3/smbd/server.c | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'source3/smbd')

diff --git a/source3/smbd/server.c b/source3/smbd/server.c
index 075e44d319..76dab96ad9 100644
--- a/source3/smbd/server.c
+++ b/source3/smbd/server.c
@@ -359,6 +359,10 @@ static void smbd_accept_connection(struct tevent_context *ev,
 		/* Child code ... */
 		am_parent = 0;
 
+#ifdef WITH_MADVISE_PROTECTED
+		madvise(NULL,0,MADV_PROTECT);
+#endif
+
 		/* Stop zombies, the parent explicitly handles
 		 * them, counting worker smbds. */
 		CatchChild();
@@ -1127,6 +1131,9 @@ extern void build_options(bool screen);
 	if (is_daemon && !interactive) {
 		DEBUG( 3, ( "Becoming a daemon.\n" ) );
 		become_daemon(Fork, no_process_group);
+#ifdef WITH_MADVISE_PROTECTED
+		madvise(NULL,0,MADV_PROTECT);
+#endif
 	}
 
 #if HAVE_SETPGID
-- 
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