On Thu, 2017-06-08 at 07:34 -0500, Bryant G. Ly wrote: > > Thanks Nic, > > > > applied to the configfs-for-next tree. I'm not entirely sure if we > > should bother adding this to 4.12 or if it hits rarely enough? > > > It hits for us pretty often when we have a GPFS setup with 10 hosts and 1k+ vms. > > That is how we discovered the bug in the first place. > Using a DATERA workload with 1K unique multi-tenant backend devices and 1K unique iscsi-target IQNs per node, I've never tripped across this particular bug.. However, our userspace built atop rtslib is enforcing tenant shutdown of individual rmdir(2) of /sys/kernel/config/target/$FABRIC/$WWN/$TPGT/, before rmdir(2) of /sys/kernel/config/target/core/$HBA/$DEV/ occurs. Based on Bryant's original backtrace with targetcli, it looks like the Novalink user-space is not enforcing this requirement across user-space processes doing fabric port symlink and backend device shutdown. That said it probably doesn't need a special v4.12-rc PULL, but based on Bryant's feedback it certainly does deserve a stable CC'.
