namespace's request queue is frozen and quiesced during error recovering,
writeback IO is blocked in bio_queue_enter(), so fsync_bdev() <-
del_gendisk()
can't move on, and causes IO hang. Removal could be from sysfs, hard
unplug or error handling.
Fix this kind of issue by marking controller as DEAD if removal breaks
error recovery.
This ways is reasonable too, because controller can't be recovered any
more after being removed.
This looks fine to me Ming,
Reviewed-by: Sagi Grimberg <sagi@xxxxxxxxxxx>
I still want your patches for tcp/rdma that move the freeze.
If you are not planning to send them, I swear I will :)
Ming, can you please send the tcp/rdma patches that move the
freeze? As I said before, it addresses an existing issue with
requests unnecessarily blocked on a frozen queue instead of
failing over.
