Date: Sat, 11 Apr 2009 16:12:20 +0000 (UTC) From: Konstantin Belousov <kib@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r190942 - head/sys/kern Message-ID: <200904111612.n3BGCKs4091800@svn.freebsd.org>
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Author: kib Date: Sat Apr 11 16:12:20 2009 New Revision: 190942 URL: http://svn.freebsd.org/changeset/base/190942 Log: When zapping v_cache_dd for !MAKEENTRY case in cache_lookup(), we shall lock cache as writer. Reviewed by: kan Modified: head/sys/kern/vfs_cache.c Modified: head/sys/kern/vfs_cache.c ============================================================================== --- head/sys/kern/vfs_cache.c Sat Apr 11 15:26:31 2009 (r190941) +++ head/sys/kern/vfs_cache.c Sat Apr 11 16:12:20 2009 (r190942) @@ -410,6 +410,8 @@ retry_wlocked: goto unlock; } if ((cnp->cn_flags & MAKEENTRY) == 0) { + if (!wlocked && !CACHE_UPGRADE_LOCK()) + goto wlock; if (dvp->v_cache_dd->nc_flag & NCF_ISDOTDOT) cache_zap(dvp->v_cache_dd); dvp->v_cache_dd = NULL;
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