Author: mav
Date: Sun Jan 11 11:51:18 2009
New Revision: 187051
URL: http://svn.freebsd.org/changeset/base/187051
Log:
MFC rev. 186907:
Mark ng_vjc node as FORCE_WRITER to protect slcompress state.
I think it can be the reason of livelock in netgraph reported by some
mpd users.
Modified:
stable/7/sys/ (props changed)
stable/7/sys/contrib/pf/ (props changed)
stable/7/sys/dev/ath/ath_hal/ (props changed)
stable/7/sys/dev/cxgb/ (props changed)
stable/7/sys/netgraph/ng_vjc.c
Modified: stable/7/sys/netgraph/ng_vjc.c
==============================================================================
--- stable/7/sys/netgraph/ng_vjc.c Sun Jan 11 11:36:00 2009
(r187050)
+++ stable/7/sys/netgraph/ng_vjc.c Sun Jan 11 11:51:18 2009
(r187051)
@@ -249,6 +249,9 @@ ng_vjc_constructor(node_p node)
NG_NODE_SET_PRIVATE(node, priv);
+ /* slcompress is not thread-safe. Protect it's state here. */
+ NG_NODE_FORCE_WRITER(node);
+
/* Done */
return (0);
}
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