https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=242047
Bug ID: 242047
Summary: ctld zvol hangups
Product: Base System
Version: 12.1-RELEASE
Hardware: amd64
OS: Any
Status: New
Severity: Affects Many People
Priority: ---
Component: kern
Assignee: b...@freebsd.org
Reporter: pproca...@gmail.com
I believe I'm having similar issues to the following two bug reports but am not
100% sure:
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=229958
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=226499
I'm therefore creating a new bug report detailing the problems I have
happening.
I've created a 1TB ZVOL and have giving it to ctld for iSCSI attachment
elsewhere.
When the host that is copying large amount of data to this ZVOL fires up over
iSCSI, the iSCSI disk hangs and eventually disappears.
Furthermore, while this is happening, some processes (not all) on the host
itself hang entirely. zpool related commands hang, attempts to restart ctld
hang, a forceful kill of ctld does nothing.
I'm really not sure what information to provide other than my zfs
configuration:
-------------------------------
zpool status -v
pool: tank
state: ONLINE
scan: none requested
config:
NAME STATE READ WRITE CKSUM
tank ONLINE 0 0 0
raidz2-0 ONLINE 0 0 0
ada0 ONLINE 0 0 0
ada1 ONLINE 0 0 0
ada2 ONLINE 0 0 0
ada3 ONLINE 0 0 0
errors: No known data errors
pool: zroot
state: ONLINE
scan: none requested
config:
NAME STATE READ WRITE CKSUM
zroot ONLINE 0 0 0
nvd0p2 ONLINE 0 0 0
errors: No known data errors
-------------------------------
Other than the above, the only thing I can think to provide are system specs:
CPU: 29.7% user, 0.2% nice, 2.5% system, 0.1% interrupt, 67.4% idle
Mem: 737M Active, 3927M Inact, 13M Laundry, 55G Wired, 2334M Free
ARC: 46G Total, 21G MFU, 21G MRU, 2295M Anon, 204M Header, 1635M Other
40G Compressed, 41G Uncompressed, 1.02:1 Ratio
.. and perhaps OS version: # uname -a
FreeBSD nas.myhome 12.1-RELEASE-p1 FreeBSD 12.1-RELEASE-p1 GENERIC amd64
If there's a way I can debug this problem while it's occuring, I'd like to know
so I can pass it along, but it appears in the other two bug reports I've
listed, the problem area is around ZVOL/locking.
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