Date: Fri, 12 Aug 2016 16:05:53 +0000 (UTC) From: Bryan Drewery <bdrewery@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r304008 - head/sys/dev/filemon Message-ID: <201608121605.u7CG5rU9007016@repo.freebsd.org>
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Author: bdrewery Date: Fri Aug 12 16:05:53 2016 New Revision: 304008 URL: https://svnweb.freebsd.org/changeset/base/304008 Log: Avoid taking PROC_LOCK in syscalls if not being traced. MFC after: 1 week Sponsored by: EMC / Isilon Storage Division Modified: head/sys/dev/filemon/filemon.c Modified: head/sys/dev/filemon/filemon.c ============================================================================== --- head/sys/dev/filemon/filemon.c Fri Aug 12 14:10:11 2016 (r304007) +++ head/sys/dev/filemon/filemon.c Fri Aug 12 16:05:53 2016 (r304008) @@ -137,6 +137,8 @@ filemon_proc_get(struct proc *p) { struct filemon *filemon; + if (p->p_filemon == NULL) + return (NULL); PROC_LOCK(p); filemon = filemon_acquire(p->p_filemon); PROC_UNLOCK(p);
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