Jun700:42:57localhost kernel: CPU0: hi:0, btch:1usd:0Jun700:42:57localhost kernel: CPU1: hi:0, btch:1usd:0Jun700:42:57localhost kernel: Node0DMA32 per-cpu: Jun700:42:57localhost kernel: CPU0: hi:186, btch:31usd:129Jun700:42:57localhost kernel: CPU1: hi:186, btch:31usd...
Dec 09 17:14:12 localhost.localdomain kdumpctl[3730]: kexec: loaded kdump kernel Dec 09 17:14:12 localhost.localdomain kdumpctl[3730]: Starting kdump: [OK] Dec 09 17:14:12 localhost.localdomain systemd[1]: Started Crash recovery kernel arming. Environment Red Hat Enterprise Linux 7...
[ 420.587373] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000007 [ 420.587423] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000007 [ 420.587667] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000007 [ 420.587670]...
Dmesg under the hood: Dmesg allows us to grasp what's going on under the hood when the kernel gets bad. Check out how dmesg is able to read kernel logs and show to the user. Petitboot: is an operating system bootloader based on Linux kexec. It can load any operating system image that...
BetrFS: The Bε-tree File System, or BetrFS, is an in-kernel file system that uses Bε trees to organize on-disk storage. Bε trees are a write-optimized dictionary, and offer the same asymptotic behavior for sequential I/O and point queries as a B-tree. github. exFAT: Free exFAT...
= none | {{ <boolean> | xen } { [:[powersave|performance|ondemand|userspace][,[<maxfreq>]][,[<minfreq>]]] } [,verbose]} | dom0-kernel | hwp[:[<hdc>][,verbose]] Default:xen Indicate where the responsibility for driving power states lies. Note that the choice ofdom0-kernelis...
上面是 SysRq-6 的输出,它等同于 echo "6" > /proc/sys/kernel/printk 操作,将 console_loglevel 设置为 6 。 C - 触发 Crashdump SysRq : Trigger a crashdump Kexec: Warning: crash image not loaded Kernel panic - not syncing: SysRq-triggered panic!
利用SysRq 键排除和诊断系统故障,说白了,SysRq手动触发而不用命令,/proc/sysrq-trigger这个是通过命令接口实验:LINUX窗口下,CTRL+ALT+F1,切换到TTY1,在文本模式下,按下ALT+SysRq+F组合健,手动OOPS,在另一个远程连接下打开/var/log/messages查看OOM[root@localhostlog]#c
= none | {{ <boolean> | xen } { [:[powersave|performance|ondemand|userspace][,[<maxfreq>]][,[<minfreq>]]] } [,verbose]} | dom0-kernel | hwp[:[<hdc>][,verbose]] Default:xen Indicate where the responsibility for driving power states lies. Note that the choice ofdom0-kernelis...