https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=229694
Bug ID: 229694
Summary: [zfs] unkillable "zpool scrub" in
[tx->tx_sync_done_cv] state for damaged data
Product: Base System
Version: 11.2-STABLE
Hardware: Any
OS: Any
Status: New
Severity: Affects Some People
Priority: ---
Component: kern
Assignee: sta...@freebsd.org
Reporter: eu...@freebsd.org
CC: f...@freebsd.org
Hi!
"zpool scrub" may hang in an uninterruptable disk i/o state in case of damaged
pool data for 11.2-STABLE/amd64 r335757. This is easily reproduceable using
file-backed ZFS pool when files reside on another ("real") pool:
cd dir # resides on ZFS
size=100
rm -f vdev1 vdev2
truncate -s ${size}m vdev1 vdev2
zpool create ztest $(realpath vdev1)
zpool add ztest $(realpath vdev2)
# simulate data corruption
dd if=/dev/urandom of=vdev2 bs=1m count=${size}
zpool scrub ztest
The last command "zpool scrub" always hangs here:
load: 0.53 cmd: zpool 2130 [tx->tx_sync_done_cv] 34.59r 0.00u 0.00s 0% 3692k
"kill -9" cannot kill it.
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