Date: Sun, 29 Sep 2013 19:11:24 -0400 (EDT) From: kwhite@site.uottawa.ca To: freebsd-current@freebsd.org Subject: ZFS panic with r255937 Message-ID: <60850.74.51.61.7.1380496284.squirrel@courriel.site.uottawa.ca>
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I get the following reproducible panic when doing a zfs send -R | zfs recv
of a well churned file system (snapshots of the ports tree before and
after libiconv update) running a recent current:
panic: solaris assert: dn->dn_maxblkid == 0 &&
(BP_IS_HOLE(&dn->dn_phys->dn_blkptr[0]) || dnode_block_freed(dn, 0)),
file:
/usr/src/sys/modules/zfs/../../cddl/contrib/opensolaris/uts/common/fs/zfs/dnode.c,
line: 598
coredump available.
# uname -a
FreeBSD freebsd10 10.0-ALPHA4 FreeBSD 10.0-ALPHA4 #0 r255937: Sun Sep 29
09:45:21 EDT 2013 kwhite@freebsd10:/usr/obj/usr/src/sys/GENERIC amd64
# zfs list -t snapshot -r tank/ports
NAME USED AVAIL REFER MOUNTPOINT
tank/ports@20130915 72.5M - 3.64G -
tank/ports@20130917 0 - 3.65G -
tank/ports@20130918 0 - 3.65G -
tank/ports@20130921 88.6M - 3.66G -
tank/ports@20130928 352K - 3.66G -
# zpool list -v
NAME SIZE ALLOC FREE CAP DEDUP HEALTH ALTROOT
m_tank 1.81T 831G 1.00T 44% 1.00x ONLINE -
ada4.nop.eli 1.81T 831G 1.00T -
tank 928G 831G 96.9G 89% 1.00x ONLINE -
ada3.nop.eli 928G 831G 96.9G -
# zfs send -vR tank/ports@20130928 | zfs recv -vF m_tank/xports
... panic eventually ...
# cd /boot/kernel; kgdb kernel /var/crash/vmcore.last
...
(kgdb) up
#5 0xffffffff81d09735 in dnode_reallocate (dn=0xfffff8006dde3000,
ot=DMU_OT_PLAIN_FILE_CONTENTS, blocksize=1024, bonustype=DMU_OT_SA,
bonuslen=168, tx=0xfffff8006d7a2600)
at
/usr/src/sys/modules/zfs/../../cddl/contrib/opensolaris/uts/common/fs/zfs/dnode.c:596
596 ASSERT(dn->dn_maxblkid == 0 &&
(kgdb) p dn->dn_maxblkid
$1 = 2
So, no question about why the ASSERT failed.
Sorry, debugging this is *way* beyond me. Any hints, patches to try?
...keith
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