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

Christian Borntraeger
2018-04-05T17:39:56Z

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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.

[-- Attachment #2: dmesg.gz --]
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[-- Attachment #3: lscpu --]
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Architecture: s390x
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Big Endian
CPU(s): 16
On-line CPU(s) list: 0-15
Thread(s) per core: 2
Core(s) per socket: 8
Socket(s) per book: 3
Book(s) per drawer: 2
Drawer(s): 4
NUMA node(s): 1
Vendor ID: IBM/S390
Machine type: 2964
CPU dynamic MHz: 5000
CPU static MHz: 5000
BogoMIPS: 20325.00
Hypervisor: PR/SM
Hypervisor vendor: IBM
Virtualization type: full
Dispatching mode: horizontal
L1d cache: 128K
L1i cache: 96K
L2d cache: 2048K
L2i cache: 2048K
L3 cache: 65536K
L4 cache: 491520K
NUMA node0 CPU(s): 0-15
Flags: esan3 zarch stfle msa ldisp eimm dfp edat etf3eh highgprs te vx sie

[-- Attachment #4: lscpu2 --]
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CPU NODE DRAWER BOOK SOCKET CORE L1d:L1i:L2d:L2i ONLINE CONFIGURED POLARIZATION ADDRESS
0 0 0 0 0 0 0:0:0:0 yes yes horizontal 0
1 0 0 0 0 0 1:1:1:1 yes yes horizontal 1
2 0 0 0 0 1 2:2:2:2 yes yes horizontal 2
3 0 0 0 0 1 3:3:3:3 yes yes horizontal 3
4 0 0 0 0 2 4:4:4:4 yes yes horizontal 4
5 0 0 0 0 2 5:5:5:5 yes yes horizontal 5
6 0 0 0 0 3 6:6:6:6 yes yes horizontal 6
7 0 0 0 0 3 7:7:7:7 yes yes horizontal 7
8 0 0 0 1 4 8:8:8:8 yes yes horizontal 8
9 0 0 0 1 4 9:9:9:9 yes yes horizontal 9
10 0 0 0 1 5 10:10:10:10 yes yes horizontal 10
11 0 0 0 1 5 11:11:11:11 yes yes horizontal 11
12 0 0 0 1 6 12:12:12:12 yes yes horizontal 12
13 0 0 0 1 6 13:13:13:13 yes yes horizontal 13
14 0 0 0 1 7 14:14:14:14 yes yes horizontal 14
15 0 0 0 1 7 15:15:15:15 yes yes horizontal 15