Date: Thu, 26 Apr 2001 10:11:10 -0400 (EDT) From: jfh@cise.ufl.edu To: FreeBSD-gnats-submit@freebsd.org Subject: kern/26878: Kernel panic in nfs subsystem (vrele: negative ref cnt) Message-ID: <200104261411.f3QEBAp33921@cedar.cise.ufl.edu>
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>Number: 26878 >Category: kern >Synopsis: Kernel panic in nfs subststem (vrele: negative ref cnt) >Confidential: no >Severity: serious >Priority: medium >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Thu Apr 26 07:20:01 PDT 2001 >Closed-Date: >Last-Modified: >Originator: Jim Hranicky (jfh@cise.ufl.edu) >Release: FreeBSD 4.2-STABLE i386 >Organization: University of Florida CISE Department >Environment: - FreeBSD 4.2-STABLE #3: Tue Jan 23 10:54:27 EST 2001 - 650MHz Pentium III - 440 GX motherboard - 1 internal LVD SCSI drive - 4 external LVD SCSI drives - NFS exported partitions created with vinum (multiple single-plex concat partitions) - ffs+softupdates >Description: Kernel panic in the nfs subsystem. Here is the trace: db> trace Debugger(c0338723) at Debugger+0x34 panic(c033c69c,55,0,0,d6e1dcfc) at panic+0x70 vrele(d732bcc0) at vrele+0x92 nfsrv_symlink(c7748800,c7e4d100,d5a568a0,d6e1ddfc,0) at nfsrv_symlink+0x1212 nfssvc_nfsd(d6e1de5c,807c360,d5a568a0,d5a568a0,2) at nfssvc_nfsd+0x502 nfssvc(d5a568a0,d6e1df80,4,0,0) at nfssvc+0x643 syscall2(2f,2f,2f,0,0) at syscall2+0x1f1 Xint0x80_syscall() at Xint0x80_syscall+0x25 Unfortunately, I've just upgraded to 4.3-STABLE on my master machine, and though I have a dump, I don't have a debugging kernel to go along with it. I tried checking out -STABLE for 01/23/01, but no luck (I've probably modified the kernel config since then, no backup *sigh*). However, this machine did have a filesystem fill up on it prior to the panic, and the process writing to it over NFS obviously didn't notice, and kept trying repeatedly. The machine had been up for 46 days without a problem (and without any modifications) before this. >How-To-Repeat: Fill up a filesystem and write to it continuously over NFS? >Fix: Unknown. >Release-Note: >Audit-Trail: >Unformatted: To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-bugs" in the body of the message
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