On 05/06/2020 01:59, Ming Lei wrote:
hctx5: default 36 37 38 39
hctx6: default 40 41 42 43
hctx7: default 44 45 46 47
hctx8: default 48 49 50 51
hctx9: default 52 53 54 55
hctx10: default 56 57 58 59
hctx11: default 60 61 62 63
hctx12: default 0 1 2 3
hctx13: default 4 5 6 7
hctx14: default 8 9 10 11
hctx15: default 12 13 14 15
OK, the queue mapping is correct.
As I mentioned in another thread, the real hw tag may be set as wrong.
I doubt this.
And I think that you should also be able to add the same debug to
blk_mq_hctx_notify_offline() to see that there may be still driver tags
allocated to when all the scheduler tags are free'd for any test in your
env.
You have to double check your cooked tag allocation algorithm and see if it
can work well when more requests than real hw queue depth are queued to hisi_sas,
and the correct way is to return SCSI_MLQUEUE_HOST_BUSY from .queuecommand().
Yeah, the LLDD would just reject requests in that scenario and we would
know about it from logs etc.
Anyway, I'll continue to check.
Thanks,
John
