Date: Sun, 11 Jan 2009 11:51:18 +0000 (UTC) From: Alexander Motin <mav@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-7@freebsd.org Subject: svn commit: r187051 - in stable/7/sys: . contrib/pf dev/ath/ath_hal dev/cxgb netgraph Message-ID: <200901111151.n0BBpIcA027596@svn.freebsd.org>
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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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