Re: [PATCH] blk-mq: only run mapped hw queues in blk_mq_run_hw_queues()

Christian Borntraeger
2018-04-05T17:43:20Z

On 04/05/2018 07:39 PM, Christian Borntraeger wrote:
>
>
> On 04/05/2018 06:11 PM, Ming Lei wrote:
>>>
>>> Could you please apply the following patch and provide the dmesg boot log?
>>
>> And please post out the 'lscpu' log together from the test machine too.
>
> attached.
>
> As I said before this seems to go way with CONFIG_NR_CPUS=64 or smaller.
> We have 282 nr_cpu_ids here (max 141CPUs on that z13 with SMT2) but only 8 Cores
> == 16 threads.

To say it differently
The whole system has up to 141 cpus, but this LPAR has only 8 cpus assigned. So we
have 16 CPUS (SMT) but this could become up to 282 IF I would do CPU hotplug. (But
this is not used here).