Kernel reset to recover from operating system errors
A baseboard management controller (BMC) of an information handling system may generate a signal to cause the information handling system to reload a kernel of an operating system of the information handling system. The BMC may generate a signal for reloading a kernel of an operating system of an information handling system, and the information handling system may reload the operating system kernel.
1. A method for reloading a kernel of an operating system of an information handling system, comprising:
generating a signal, by a baseboard management controller (BMC), for reloading the kernel of the operating system; and
reloading the kernel of the operating system based on the signal generated by the BMC,
wherein reloading the kernel comprises issuing a kernel reset command by an advanced configuration and power interface (ACPI) driver of the information handling system, and
wherein reloading the kernel comprises resetting the kernel without rebooting the information handling system.
2. The method of claim 1 , further comprising:
detecting an operating system hang,
wherein the step of generating is performed based, at least in part, on the detection of the operating system hang.
3. The method of claim 1 , wherein generating the signal comprises pulsing power to a power button line of the information handling system for a predetermined interval.
4. The method of claim 3 , wherein pulsing power to the power button line of the information handling system is performed by a complex programmable logic device (CPLD) of the BMC.
5. The method of claim 1 , further comprising detecting the signal, by the advanced configuration and power interface (ACPI) driver of the information handling system.
6. The method of claim 1 , wherein reloading the kernel comprises reloading the kernel from a non-volatile random access memory (NVRAM) of the information handling system.
7. The method of claim 1 , wherein resetting the kernel without rebooting the information handling system comprises reloading the kernel without engaging in basic input output system (BIOS) booting steps.
8. An information handling system comprising:
a baseboard management controller (BMC); and
a processor,
wherein the processor is configured to perform steps comprising
detecting a signal generated by the BMC for reloading a kernel of the operating system; and
reloading the kernel of the operating system based on the signal generated by the BMC,
wherein reloading the kernel comprises issuing a kernel reset command by an advanced configuration and power interface (ACPI) driver of the information handling system, and
wherein reloading the kernel comprises resetting the kernel without rebooting the information handling system.
9. The information handling system of claim 8 , wherein the BMC is configured to perform steps comprising:
detecting an operating system hang, and
generating the signal for reloading the kernel of the operating system based, at least in part, on the detection of the operating system hang.
10. The information handling system of claim 8 , wherein the BMC is configured to generate the signal by pulsing power to a power button line of the information handling system for a predetermined interval.
11. The information handling system of claim 10 , wherein pulsing power to the power button line of the information handling system is performed by a complex programmable logic device (CPLD) of the BMC.
12. The information handling system of claim 8 , further comprising detecting the signal, by the advanced configuration and power interface (ACPI) driver of the information handling system.
13. The information handling system of claim 8 , wherein reloading the kernel comprises reloading the kernel from a non-volatile random access memory (NVRAM) of the information handling system.
14. The information handling system of claim 8 , wherein resetting the kernel without rebooting the information handling system comprises reloading the kernel without engaging in basic input output system (BIOS) booting steps.
15. A computer program product, comprising:
a non-transitory computer readable medium comprising instructions to perform steps comprising:
generating a signal, by a baseboard management controller (BMC), for reloading a kernel of an operating system; and
reloading the kernel of the operating system based on the signal generated by the BMC,
wherein reloading the kernel comprises issuing a kernel reset command by an advanced configuration and power interface (ACPI) driver of an information handling system, and
wherein reloading the kernel comprises resetting the kernel without rebooting the information handling system.
16. The computer program product of claim 15 , wherein the non-transitory computer readable medium comprises instructions to perform steps further comprising:
detecting an operating system hang,
wherein the step of generating is performed based, at least in part, on the detection of the operating system hang.
17. The computer program product of claim 15 , wherein generating the signal comprises pulsing power to a power button line of the information handling system for a predetermined interval.
18. The computer program product of claim 17 , wherein pulsing power to the power button line of the information handling system is performed by a complex programmable logic device (CPLD) of the BMC.
19. The computer program product of claim 15 , wherein the non-transitory computer readable medium comprises instructions to perform steps further comprising detecting the signal, by the advanced configuration and power interface (ACPI) driver of the information handling system.
20. The computer program product of claim 15 , wherein resetting the kernel without rebooting the information handling system comprises reloading the kernel without engaging in basic input output system (BIOS) booting steps.