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From: Mikolaj Golub <trociny@FreeBSD.org>
Date: Thu, 31 Oct 2013 20:32:11 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
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Subject: svn commit: r257471 - stable/8/sbin/hastd
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Author: trociny
Date: Thu Oct 31 20:32:11 2013
New Revision: 257471
URL: http://svnweb.freebsd.org/changeset/base/257471

Log:
  MFC r257154:
  
  Merging local and remote bitmaps must be protected by hr_amp lock.
  
  This is believed to fix hastd crashes, which might occur during
  synchronization, triggered by the failed assertion:
  
   Assertion failed: (amp->am_memtab[ext] > 0),
   function activemap_write_complete, file activemap.c, line 351.

Modified:
  stable/8/sbin/hastd/primary.c
Directory Properties:
  stable/8/sbin/hastd/   (props changed)

Modified: stable/8/sbin/hastd/primary.c
==============================================================================
--- stable/8/sbin/hastd/primary.c	Thu Oct 31 20:31:16 2013	(r257470)
+++ stable/8/sbin/hastd/primary.c	Thu Oct 31 20:32:11 2013	(r257471)
@@ -781,6 +781,7 @@ init_remote(struct hast_resource *res, s
 			free(map);
 			goto close;
 		}
+		mtx_lock(&res->hr_amp_lock);
 		/*
 		 * Merge local and remote bitmaps.
 		 */
@@ -790,7 +791,6 @@ init_remote(struct hast_resource *res, s
 		 * Now that we merged bitmaps from both nodes, flush it to the
 		 * disk before we start to synchronize.
 		 */
-		mtx_lock(&res->hr_amp_lock);
 		(void)hast_activemap_flush(res);
 	}
 	nv_free(nvin);