misc/157179: zfs/dbuf.c: panic: solaris assert: arc_buf_remove_ref(db->db_buf, db) == 0

B. sbremal at hotmail.com
Thu May 19 12:10:10 UTC 2011 

>Number:         157179
>Category:       misc
>Synopsis:       zfs/dbuf.c: panic: solaris assert: arc_buf_remove_ref(db->db_buf, db) == 0
>Confidential:   no
>Severity:       critical
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Thu May 19 12:10:09 UTC 2011
>Closed-Date:
>Last-Modified:
>Originator:     B.
>Release:        FreeBSD 7.2-RELEASE
>Organization:
>Environment:
FreeBSD babapc.dyndns.org 7.2-RELEASE FreeBSD 7.2-RELEASE #0: Fri May  1 08:49:13 UTC 2009     root at walker.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC  i386
>Description:
This may be of interest for you to improve some ZFS code:

Actually the file system which is full (/usr) is not the ZFS file system (/backups). However the ZFS pool file store is located on at /usr/local/zfs/store:

su
mkdir /usr/local/zfs
dd bs=1k count=20000000 if=/dev/zero of=/usr/local/zfs/store
mdconfig -f /usr/local/zfs/store -u 0
zpool create backups /dev/md0

security run output:

+++ /tmp/security.CU0Mf52A	2011-05-19 03:04:11.000000000 +0200
+pid 97987 (bsdtar), uid 1001 inumber 37848101 on /usr: filesystem full
+pid 97987 (bsdtar), uid 1001 inumber 37918725 on /usr: filesystem full
+pid 97987 (bsdtar), uid 1001 inumber 37918726 on /usr: filesystem full
+pid 97987 (bsdtar), uid 1001 inumber 37918729 on /usr: filesystem full
+pid 97987 (bsdtar), uid 1001 inumber 37918732 on /usr: filesystem full
+pid 97987 (bsdtar), uid 1001 inumber 37918736 on /usr: filesystem full
+pid 97987 (bsdtar), uid 1001 inumber 37918736 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+pid 642 (postgres), uid 70 inumber 7539820 on /usr: filesystem full
+panic: solaris assert: arc_buf_remove_ref(db->db_buf, db) == 0, file: /usr/src/sys/modules/zfs/../../cddl/contrib/opensolaris/uts/common/fs/zfs/dbuf.c, line: 1718
+cpuid = 0
+Uptime: 97d20h52m17s
+Physical memory: 1779 MB
+Dumping 396 MB: 381 365 349 333 317 301 285 269 253 237 221 205 189 173 157 141 125 109 93 77 61 45 29 13Copyright (c) 1992-2009 The FreeBSD Project.
+Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
+	The Regents of the University of California. All rights reserved.
+FreeBSD is a registered trademark of The FreeBSD Foundation.
+FreeBSD 7.2-RELEASE #0: Fri May  1 08:49:13 UTC 2009
+    root at walker.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC
+Timecounter "i8254" frequency 1193182 Hz quality 0
+CPU: Intel(R) Atom(TM) CPU  330   @ 1.60GHz (1600.02-MHz 686-class CPU)
+  Origin = "GenuineIntel"  Id = 0x106c2  Stepping = 2
+  Features=0xbfe9fbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE>
+  Features2=0x40e31d<SSE3,DTES64,MON,DS_CPL,TM2,SSSE3,CX16,xTPR,PDCM,<b22>>
+  AMD Features=0x20100000<NX,LM>
+  AMD Features2=0x1<LAHF>
+  Cores per package: 2
+  Logical CPUs per core: 2

>How-To-Repeat:
Did not try to repeat (causes panic and server restart)
>Fix:
Not known

>Release-Note:
>Audit-Trail:
>Unformatted:

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