Description shanxifanshi 2022-12-05 13:37:17 UTC

[缺陷描述]：
liburing-test下sqpoll-idle-us用例fail， sqe submit failed: -22

测试日志：
# ./sqpoll-idle-us
sqe submit failed: -22
test failed: 1

[重现概率]：
必现

[重现环境]：
环境信息：物理机

OS：
KERNEL: 
# uname -r
5.10.134-494.git.97a308195.an8.x86_64

MEMORY:
# free -h
              total        used        free      shared  buff/cache   available
Mem:           62Gi       1.4Gi        59Gi       127Mi       1.1Gi        59Gi
Swap:         2.0Gi        24Mi       2.0Gi

CPU:
# lscpu
Architecture:        x86_64
CPU op-mode(s):      32-bit, 64-bit
Byte Order:          Little Endian
CPU(s):              24
On-line CPU(s) list: 0-23
Thread(s) per core:  2
Core(s) per socket:  12
Socket(s):           1
NUMA node(s):        1
Vendor ID:           GenuineIntel
BIOS Vendor ID:      Intel
CPU family:          6
Model:               63
Model name:          Intel(R) Xeon(R) CPU E5-2680 v3 @ 2.50GHz
BIOS Model name:     Intel(R) Xeon(R) CPU E5-2680 v3 @ 2.50GHz
Stepping:            2
CPU MHz:             2177.958
CPU max MHz:         2500.0000
CPU min MHz:         1200.0000
BogoMIPS:            4988.62
Virtualization:      VT-x
L1d cache:           32K
L1i cache:           32K
L2 cache:            256K
L3 cache:            30720K
NUMA node0 CPU(s):   0-23
Flags:               fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc cpuid aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid dca sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm cpuid_fault epb invpcid_single pti intel_ppin ssbd ibrs ibpb stibp tpr_shadow vnmi flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid cqm xsaveopt cqm_llc cqm_occup_llc dtherm arat pln pts md_clear flush_l1d

# cat /etc/os-release
NAME="Anolis OS"
VERSION="8.6"
ID="anolis"
ID_LIKE="rhel fedora centos"
VERSION_ID="8.6"
PLATFORM_ID="platform:an8"
PRETTY_NAME="Anolis OS 8.6"
ANSI_COLOR="0;31"
HOME_URL="https://openanolis.cn/"


[复现步骤]：
1. 下载liburing代码
2. 解压liburing，cd liburing && tar -xvf liburing-0.7.tar.gz
3. 编译前配置：cd liburing-0.7 && ./configure
4. 对源码进行编译：make
5. 执行测试：cd test && ./sqpoll-idle-us

[期望结果]：
用例pass

[实际结果]：
用例fail


[原因分析]：
这个用例在11.29号的nightly中还是pass的，在12.1号的nightly首次fail，之后一直fail

fail部分测试代码如下：

static int submit_single_nop(struct io_uring *ring, bool submit_on_idle)
{
        struct io_uring_sqe *sqe;
        int ret;

        sqe = io_uring_get_sqe(ring);
        if (!sqe) {
                fprintf(stderr, "get sqe failed\n");
                goto err;
        }

        io_uring_prep_nop(sqe);

        if (submit_on_idle)
                ret = io_uring_submit_on_idle(ring);
        else
                ret = io_uring_submit(ring);
        if (ret <= 0) {
                fprintf(stderr, "sqe submit failed: %d\n", ret);  --用例在此fail
                goto err;
        }

        return 0;
err:
        return 1;
}

从近期提交的PR看，可能跟这个PR相关
https://gitee.com/anolis/cloud-kernel/pulls/924/