查看问题详情
| 编号 | 项目 | 分类 | 查看权限 | 报告日期 | 最后更新 |
|---|---|---|---|---|---|
| 0000017 | Anolis OS 8 | kernel | public | 2021-03-19 11:16 | 2021-07-23 10:29 |
| 报告员 | wb-zmy745940 | 分派给 | cherryliyumei | ||
| 优先级 | low | 严重性 | minor | 出现频率 | always |
| 状态 | assigned | 处理状况 | open | ||
| 平台 | x86_64 | 操作系统 | Anolis OS | 操作系统版本 | 8 |
| 产品版本 | 8.2-rc1 | ||||
| 目标版本 | 8.2 正式版 | ||||
| 标题 | 0000017: [Anolis 8.2-RC1-4.18-x86]kdump配置crashkernel=0M-2G:0M,2G-8G:192M,8G-:256M,erho c触发异常后，系统起不来 | ||||
| 描述 | [缺陷描述]： kdump配置crashkernel=0M-2G:0M,2G-8G:192M,8G-:256M,erho c > /proc/sysrq-trigger触发异常后，系统起不来 # cat /proc/cmdline BOOT_IMAGE=(hd0,msdos1)/vmlinuz-4.18.0-193.el8.x86_64 root=/dev/mapper/ao-root ro mem=0 crashkernel=0M-2G:0M,2G-8G:192M,8G-:256M resume=/dev/mapper/ao-swap rd.lvm.lv=ao/root rd.lvm.lv=ao/swap rhgb quiet # cat /sys/kernel/kexec_crash_size 268435456 [重现概率] 必现 [重现环境] Host:虚拟机 ，x86 OS:Anolis OS release 8.2 kernel:4.18.0-193.el8.x86_64 # lscpu Architecture: x86_64 CPU op-mode(s): 32-bit, 64-bit Byte Order: Little Endian CPU(s): 4 On-line CPU(s) list: 0-3 Thread(s) per core: 2 Core(s) per socket: 1 Socket(s): 2 NUMA node(s): 1 Vendor ID: GenuineIntel CPU family: 6 Model: 85 Model name: Intel(R) Xeon(R) Platinum 8269CY CPU @ 2.50GHz Stepping: 7 CPU MHz: 2500.000 BogoMIPS: 5000.00 Hypervisor vendor: KVM Virtualization type: full L1d cache: 32K L1i cache: 32K L2 cache: 1024K L3 cache: 36608K NUMA node0 CPU(s): 0-3 Flags: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ss ht syscall nx pdpe1gb rdtscp lm constant_tsc rep_good nopl nonstop_tsc cpuid tsc_known_freq pni pclmulqdq monitor ssse3 fma cx16 pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand hypervisor lahf_lm abm 3dnowprefetch cpuid_fault invpcid_single pti ibrs ibpb stibp fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm mpx avx512f avx512dq rdseed adx smap avx512cd avx512bw avx512vl xsaveopt xsavec xgetbv1 xsaves avx512_vnni # cat /proc/meminfo MemTotal: 16254768 kB MemFree: 13529776 kB MemAvailable: 15595552 kB Buffers: 3268 kB Cached: 2296212 kB SwapCached: 0 kB Active: 860072 kB Inactive: 1600944 kB Active(anon): 153496 kB Inactive(anon): 24792 kB Active(file): 706576 kB Inactive(file): 1576152 kB Unevictable: 0 kB Mlocked: 0 kB SwapTotal: 1888252 kB SwapFree: 1888252 kB Dirty: 96 kB Writeback: 0 kB AnonPages: 156916 kB Mapped: 170500 kB Shmem: 26580 kB KReclaimable: 72452 kB Slab: 178440 kB SReclaimable: 72452 kB SUnreclaim: 105988 kB KernelStack: 4292 kB PageTables: 8784 kB NFS_Unstable: 0 kB Bounce: 0 kB WritebackTmp: 0 kB CommitLimit: 10015636 kB Committed_AS: 1355408 kB VmallocTotal: 34359738367 kB VmallocUsed: 0 kB VmallocChunk: 0 kB Percpu: 1808 kB HardwareCorrupted: 0 kB AnonHugePages: 36864 kB ShmemHugePages: 0 kB ShmemPmdMapped: 0 kB HugePages_Total: 0 HugePages_Free: 0 HugePages_Rsvd: 0 HugePages_Surp: 0 Hugepagesize: 2048 kB Hugetlb: 0 kB DirectMap4k: 147328 kB DirectMap2M: 5095424 kB DirectMap1G: 13631488 kB [重现步骤]： 1.安装相关包，重启kdump服务 yum -y install crash kexec-tools systemctl restart kdump 2.修改grub文件，配置crashkernel，重启 sed -i 's/\(^GRUB_CMDLINE_LINUX=.*\)\(crashkernel\)=[^ ]\+ /\1 mem=0 \2=0M-2G:0M,2G-8G:192M,8G-:256M /' /etc/default/grub grub2-mkconfig -o /boot/grub2/grub.cfg shutdown -r now 3.查看crashkernel内存是否预留成功 cat /sys/kernel/kexec_crash_size 4.触发异常 echo c >/proc/sysrq-trigger 5.查看系统是否生成vmcore ll /var/crash 6.crash解析vmcore [期望结果]： 触发异常后，可生成vmcore，并crash可正常解析 [实际结果]： echo c >/proc/sysrq-trigger 触发异常后，系统起不来 [原因定位]： crashkernel设置为256M，触发异常后，系统起不来 设置crashkernel=0M-2G:0M,2G-8G:192M,8G-:512M，触发异常后，系统可起来，可正常生成vmcore； # cat /proc/cmdline BOOT_IMAGE=(hd0,msdos1)/vmlinuz-4.18.0-193.el8.x86_64 root=/dev/mapper/ao-root ro mem=0 crashkernel=0M-2G:0M,2G-8G:192M,8G-:512M resume=/dev/mapper/ao-swap rd.lvm.lv=ao/root rd.lvm.lv=ao/swap rhgb quiet # cat /sys/kernel/kexec_crash_size 536870912 # cd /var/crash/127.0.0.1-2021-03-10-15\:39\:12/ # ll total 111680 -rw-------. 1 root root 114313580 Mar 11 04:39 vmcore -rw-r--r--. 1 root root 40970 Mar 11 04:39 vmcore-dmesg.txt [修复建议]： | ||||
| 标签 | 没加标签. | ||||
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rc2内核：4.18.0-193.el8.x86_64 同样有这个问题 1、启动参数： BOOT_IMAGE=(hd0,msdos1)/vmlinuz-4.18.0-193.el8.x86_64 root=/dev/mapper/ao-root ro crashkernel=0M-2G:0M,2G-8G:192M,8G-:256M resume=/dev/mappe/ao-swap rd.lvm.lv=ao/root rd.lvm.lv=ao/swap rhgb quiet 2、内存：# cat /proc/meminfo MemTotal: 16156464 kB MemFree: 15475960 kB MemAvailable: 15596584 kB Buffers: 3332 kB Cached: 368824 kB SwapCached: 0 kB Active: 204508 kB Inactive: 287424 kB Active(anon): 120848 kB Inactive(anon): 17332 kB Active(file): 83660 kB Inactive(file): 270092 kB Unevictable: 0 kB Mlocked: 0 kB SwapTotal: 528380 kB SwapFree: 528380 kB Dirty: 108 kB Writeback: 0 kB AnonPages: 115728 kB Mapped: 112824 kB Shmem: 18408 kB KReclaimable: 40100 kB Slab: 116172 kB SReclaimable: 40100 kB SUnreclaim: 76072 kB KernelStack: 4288 kB PageTables: 8380 kB NFS_Unstable: 0 kB Bounce: 0 kB WritebackTmp: 0 kB CommitLimit: 8606612 kB Committed_AS: 997084 kB VmallocTotal: 34359738367 kB VmallocUsed: 0 kB VmallocChunk: 0 kB Percpu: 1568 kB HardwareCorrupted: 0 kB AnonHugePages: 26624 kB ShmemHugePages: 0 kB ShmemPmdMapped: 0 kB HugePages_Total: 0 HugePages_Free: 0 HugePages_Rsvd: 0 HugePages_Surp: 0 Hugepagesize: 2048 kB Hugetlb: 0 kB DirectMap4k: 114560 kB DirectMap2M: 4079616 kB DirectMap1G: 14680064 kB |
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目前我们的内核不支持crashkernel=auto这个参数，只能手动配置crashkernel的值，而这个值的大小和系统内存大小有关。 crashkernel设置为256M，触发异常后，系统起不来是因为crashkernel值设置太小的问题。 设置crashkernel=0M-2G:0M,2G-8G:192M,8G-:512M，触发异常后，系统可起来，可正常生成vmcore。 # cat /sys/kernel/kexec_crash_size 536870912 可以看到kexec_crash_size被设置为512M了。 需要内核SIG组同志确认一下这个要支持不？ |
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该问题优先级低， 不影响发布 |
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# uname -r 4.18.0-305.an8.x86_64 [root@VM20210305-3 wb-wpp899309]# cat /etc/os-release NAME="Anolis OS" VERSION="8.4" ID="anolis" ID_LIKE="rhel fedora centos" VERSION_ID="8.4" PLATFORM_ID="platform:an8" PRETTY_NAME="Anolis OS 8.4" ANSI_COLOR="0;31" HOME_URL="https://openanolis.cn/" 有相同的问题 |
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RHCK的默认参数是crash=auto，如果测试case是8G以上分配256内存那需要确认，是不是256是合理的值，改成512后是不是足够用了（比如32G内存的情况） |
| 日期 | 用户名 | 字段 | 更改 |
|---|---|---|---|
| 2021-03-19 11:16 | wb-zmy745940 | 新建问题 | |
| 2021-03-19 11:16 | wb-zmy745940 | 状态 | 新建 => 已分配 |
| 2021-03-19 11:16 | wb-zmy745940 | 分派给 | => geliwei-ali |
| 2021-03-19 11:39 | wb-zmy745940 | 分类 | kdump-anaconda-addon => kexec-tools |
| 2021-03-19 22:44 | swordantcs | 产品版本 | 8.2 正式版 => 8.2-rc1 |
| 2021-03-19 22:45 | swordantcs | 目标版本 | => 8.2-rc2 |
| 2021-03-26 10:19 | jacobwang | 分派给 | geliwei-ali => xuehaolin |
| 2021-04-02 03:22 | swordantcs | 分类 | kexec-tools => （无分类） |
| 2021-04-02 12:21 | swordantcs | 分类 | （无分类） => kernel |
| 2021-04-13 15:13 | wb-wpp899309 | 注释已添加: 0000068 | |
| 2021-04-16 16:10 | xuehaolin | 注释已添加: 0000089 | |
| 2021-04-16 16:14 | xuehaolin | 注释已编辑: 0000089 | |
| 2021-04-26 10:31 | xuehaolin | 分派给 | xuehaolin => cherryliyumei |
| 2021-05-06 10:43 | jacobwang | 优先级 | 中 => 低 |
| 2021-05-06 10:44 | jacobwang | 注释已添加: 0000132 | |
| 2021-05-06 11:02 | jacobwang | 目标版本 | 8.2-rc2 => 8.2 正式版 |
| 2021-06-30 15:04 | wb-wpp899309 | 注释已添加: 0000294 | |
| 2021-07-23 10:29 | geliwei-ali | 注释已添加: 0000328 |
