Process in T state does not want to die.....

[Eugene Grosbein]

29.11.2019 16:24, Eugene Grosbein wrote:

> 29.11.2019 4:46, Konstantin Belousov write:
> 
>>> sys_extattr_set_fd+0xee amd64_syscall+0x364 fast_syscall_common+0x101
>> This is an example of the cause for your problem.
> 
> I observe this problem too, but my use case is different.
> 
> I have several bhyve instances running Windows guests over ZVOLs over SSD-only RAIDZ1 pool.
> "zfs destroy" for snapshots with large "used" numbers takes long time (several minutes) due to slow TRIM.
> Sometimes this makes virtual guest unresponsible and attempt to restart the bhyve instance may bring it to Exiting (E)
> state for several minutes and it finishes successfully after that. But sometimes bhyve process hangs in T state indefinitely.
> 
> This is 11.3-STABLE/amd64 r354667. Should I try your patch too?

OTOH, same system has several FreeBSD jails over mounted ZFS (file systems) over same pool.
These file systems have snapshots created/removed too and snapshot are large (upto 10G).