Hello Everybody,
I am investigating strange behaviour described here
https://github.com/coreos/bugs/issues/2357 and would like to ask for
help/advice.
It all boils down to:
1. start server, login to all iscsi portals, no need to mount anything
2. logout from all or one session
3. every sessions makes kworker to spin. `l > /proc/sysrq-trigger` shows:
[19806.968333] Call Trace:
[19806.968347] scsi_remove_device+0x19/0x60 [scsi_mod]
[19806.968354] scsi_remove_target+0x167/0x1b0 [scsi_mod]
[19806.968355] iscsi_free_session+0x383/0x430 [scsi_transport_iscsi]
[19806.968366] process_one_work+0x144/0x350
[19806.968367] worker_thread+0x4d/0x3e0
[19806.968369] kthread+0xfc/0x130
[19806.968370] ? rescuer_thread+0x310/0x310
[19806.968371] ? kthread_park+0x60/0x60
[19806.968372] ? do_syscall_64+0xe9/0x1c0
[19806.968374] ret_from_fork+0x35/0x40
4. if I do `multipath -F; for d in $(iscsiadm -m session -P3 |awk '/scsi
disk/ {print $4}'); do echo 1 > /sys/block/$d/device/delete; done` before
logging out, it works just fine
5. it is reproducible 100% of the time, so I you want me to collect some
data, I can run commands for you :)
Software versions:
Kernel version is 4.14.16-coreos (CoreOS 1632.2.1)
iscsid version 2.0-873
multipath-tools 0.6.4
no iSCSI offloading
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