[dm-devel] [PATCH] Increase bindings file lock timeout to avoid failure of user_friendly_names map.

[Dave Wysochanski <dwysocha redhat com>]

On setups with a large number of paths / multipath maps, contention for
the advisory lock on the bindings file may take longer than 3 seconds,
and some multipath processes may create maps based on WWID despite having
user_friendly_names set.  Increasing the timeout is a simple fix that
gets us a bit further.

More extensive fixes might include:
1) improving the efficiency of the critical section code
2) use shared/read locks initially, then use exclusive/write locks only when
it is known the bindings file needs updated

Signed-off-by: Dave Wysochanski <dwysocha redhat com>
---
 libmultipath/alias.h |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/libmultipath/alias.h b/libmultipath/alias.h
index 3d64b9b..fe1191b 100644
--- a/libmultipath/alias.h
+++ b/libmultipath/alias.h
@@ -1,4 +1,4 @@
-#define BINDINGS_FILE_TIMEOUT 3
+#define BINDINGS_FILE_TIMEOUT 30
 #define BINDINGS_FILE_HEADER \
 "# Multipath bindings, Version : 1.0\n" \
 "# NOTE: this file is automatically maintained by the multipath program.\n" \
-- 
1.5.5.1