From owner-svn-src-head@FreeBSD.ORG Tue Mar 10 09:26:48 2009 Return-Path: Delivered-To: svn-src-head@FreeBSD.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id CAB3E1065672; Tue, 10 Mar 2009 09:26:48 +0000 (UTC) (envelope-from keramida@ceid.upatras.gr) Received: from poseidon.ceid.upatras.gr (poseidon.ceid.upatras.gr [150.140.141.169]) by mx1.freebsd.org (Postfix) with ESMTP id 367348FC08; Tue, 10 Mar 2009 09:26:48 +0000 (UTC) (envelope-from keramida@ceid.upatras.gr) Received: from mail.ceid.upatras.gr (unknown [10.1.0.143]) by poseidon.ceid.upatras.gr (Postfix) with ESMTP id 459E2EB51D5; Tue, 10 Mar 2009 11:03:14 +0200 (EET) Received: from localhost (europa.ceid.upatras.gr [127.0.0.1]) by mail.ceid.upatras.gr (Postfix) with ESMTP id 49799450C6; Tue, 10 Mar 2009 11:03:14 +0200 (EET) X-Virus-Scanned: amavisd-new at ceid.upatras.gr Received: from mail.ceid.upatras.gr ([127.0.0.1]) by localhost (europa.ceid.upatras.gr [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id UPuYwyiLp6iR; Tue, 10 Mar 2009 11:03:14 +0200 (EET) Received: from kobe.laptop (ppp079166006185.dsl.hol.gr [79.166.6.185]) by mail.ceid.upatras.gr (Postfix) with ESMTP id AB99145088; Tue, 10 Mar 2009 11:03:13 +0200 (EET) Received: from kobe.laptop (kobe.laptop [127.0.0.1]) by kobe.laptop (8.14.3/8.14.3) with ESMTP id n2A93CiZ002704; Tue, 10 Mar 2009 11:03:12 +0200 (EET) (envelope-from keramida@ceid.upatras.gr) Received: (from keramida@localhost) by kobe.laptop (8.14.3/8.14.3/Submit) id n2A93BFP002703; Tue, 10 Mar 2009 11:03:11 +0200 (EET) (envelope-from keramida@ceid.upatras.gr) From: Giorgos Keramidas To: Joe Marcus Clarke References: <200903081905.n28J5sFQ092475@svn.freebsd.org> Date: Tue, 10 Mar 2009 11:03:09 +0200 In-Reply-To: <200903081905.n28J5sFQ092475@svn.freebsd.org> (Joe Marcus Clarke's message of "Sun, 8 Mar 2009 19:05:54 +0000 (UTC)") Message-ID: <878wndeomq.fsf@kobe.laptop> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.0.91 (berkeley-unix) MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Cc: svn-src-head@FreeBSD.org, svn-src-all@FreeBSD.org, src-committers@FreeBSD.org Subject: Re: svn commit: r189539 - head/sys/kern X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 10 Mar 2009 09:26:49 -0000 On Sun, 8 Mar 2009 19:05:54 +0000 (UTC), Joe Marcus Clarke wrote: > Author: marcus (doc,ports committer) > Date: Sun Mar 8 19:05:53 2009 > New Revision: 189539 > URL: http://svn.freebsd.org/changeset/base/189539 > > Log: > Add a default implementation for VOP_VPTOCNP(9) which scans the parent > directory of a vnode to find a dirent with a matching file number. The > name from that dirent is then used to provide the component name. > > Note: if the initial vnode argument is not a directory itself, then > the default VOP_VPTOCNP(9) implementation still returns ENOENT. > > Reviewed by: kib > Approved by: kib > Tested by: pho I think this panics nullfs mounts. I have a kernel build from subversion changeset /head@189540 that panics instantly with: panic: vrele: negative ref cnt inside nullfs, every time I do something like: # mount -t nullfs /home/build/obj /usr/obj # mount -t nullfs /home/build/src /usr/src # cd /usr/src/usr.sbin/fwcontrol # make clean # make all The `make all' command never returns, and the resulting kgdb backtrace is something like: (kgdb) bt #0 doadump () at pcpu.h:246 #1 0xc063d4be in boot (howto=3D260) at /usr/src/sys/kern/kern_shutdown.c= :420 #2 0xc063d792 in panic (fmt=3DVariable "fmt" is not available. ) at /usr/src/sys/kern/kern_shutdown.c:576 #3 0xc06c8fb1 in vrele (vp=3D0xc8896648) at /usr/src/sys/kern/vfs_subr.c= :2191 #4 0xc6761610 in null_nodeget (mp=3D0xc674f000, lowervp=3D0xc8896648, vpp=3D0xe9081bf0) at /usr/src/sys/modules/nullfs/../../fs/nullfs/null_subr.c:204 #5 0xc6762601 in null_bypass (ap=3D0xe9081bdc) at /usr/src/sys/modules/nullfs/../../fs/nullfs/null_vnops.c:325 #6 0xc08d7173 in VOP_VPTOCNP_APV (vop=3D0xc6763240, a=3D0xe9081bdc) at vnode_if.c:2871 #7 0xc06b4e89 in vn_vptocnp (vp=3D0xe9081c24, bp=3D0xe9081c28, buf=3D0xc63ce000 "=CE=AE=CE=90=C2=AD=CE=AE=CE=AE=CE=90=C2=AD=CE=AE=CE= =AE=CE=90=C2=AD=CE=AE=CE=AE=CE=90=C2=AD=CE=AE=CE=AE=CE=90=C2=AD=CE=AE=CE=AE= =CE=90=C2=AD=CE=AE=CE=AE=CE=90=C2=AD=CE=AE=CE=AE=CE=90=C2=AD=CE=AE=CE=AE=CE= =90=C2=AD=CE=AE=CE=AE=CE=90=C2=AD=CE=AE=CE=AE=CE=90=C2=AD=CE=AE=CE=AE=CE=90= =C2=AD=CE=AE=CE=AE=CE=90=C2=AD=CE=AE=CE=AE=CE=90=C2=AD=CE=AE=CE=AE=CE=90=C2= =AD=CE=AE=CE=AE=CE=90=C2=AD=CE=AE=CE=AE=CE=90=C2=AD=CE=AE=CE=AE=CE=90=C2=AD= =CE=AE=CE=AE=CE=90=C2=AD=CE=AE=CE=AE=CE=90=C2=AD=CE=AE=CE=AE=CE=90=C2=AD=CE= =AE=CE=AE=CE=90=C2=AD=CE=AE=CE=AE=CE=90=C2=AD=CE=AE=CE=AE=CE=90=C2=AD=CE=AE= =CE=AE=CE=90=C2=AD=CE=AE=CE=AE=CE=90=C2=AD=CE=AE=CE=AE=CE=90=C2=AD=CE=AE=CE= =AE=CE=90=C2=AD=CE=AE=CE=AE=CE=90=C2=AD=CE=AE=CE=AE=CE=90=C2=AD=CE=AE=CE=AE= =CE=90=C2=AD=CE=AE=CE=AE=CE=90=C2=AD=CE=AE=CE=AE=CE=90=C2=AD=CE=AE=CE=AE=CE= =90=C2=AD=CE=AE=CE=AE=CE=90=C2=AD=CE=AE=CE=AE=CE=90=C2=AD=CE=AE=CE=AE=CE=90= =C2=AD=CE=AE=CE=AE=CE=90=C2=AD=CE=AE=CE=AE=CE=90=C2=AD=CE=AE=CE=AE=CE=90=C2= =AD=CE=AE=CE=AE=CE=90=C2=AD=CE=AE=CE=AE=CE=90=C2=AD=CE=AE=CE=AE=CE=90=C2=AD= =CE=AE=CE=AE=CE=90=C2=AD=CE=AE=CE=AE=CE=90=C2=AD=CE=AE=CE=AE=CE=90=C2=AD=CE= =AE=CE=AE=CE=90=C2=AD=CE=AE=CE=AE=CE=90=C2=AD=CE=AE=CE=AE=CE=90=C2=AD=CE=AE= =CE=AE=CE=90=C2=AD=CE=AE"..., buflen=3D0xe9081c48) at vnode_if.h:1541 #8 0xc06b520a in vn_fullpath1 (td=3DVariable "td" is not available. ) at /usr/src/sys/kern/vfs_cache.c:1001 #9 0xc06b55a0 in kern___getcwd (td=3D0xc6de56c0, buf=3D0xbfbfddf6
, bufseg=3DUIO_USE= RSPACE, buflen=3D1024) at /usr/src/sys/kern/vfs_cache.c:795 #10 0xc06b5749 in __getcwd (td=3D0xc6de56c0, uap=3D0xe9081cf8) at /usr/src/sys/kern/vfs_cache.c:769 #11 0xc08cc973 in syscall (frame=3D0xe9081d38) at /usr/src/sys/i386/i386/trap.c:1076 ---Type to continue, or q to quit--- #12 0xc08b0eb0 in Xint0x80_syscall () at /usr/src/sys/i386/i386/exception= .s:261 #13 0x00000033 in ?? () Previous frame inner to this frame (corrupt stack?) (kgdb) q root@kobe:/var/crash# exit exit