162306a36Sopenharmony_ciWhat: /sys/kernel/fadump/* 262306a36Sopenharmony_ciDate: Dec 2019 362306a36Sopenharmony_ciContact: linuxppc-dev@lists.ozlabs.org 462306a36Sopenharmony_ciDescription: 562306a36Sopenharmony_ci The /sys/kernel/fadump/* is a collection of FADump sysfs 662306a36Sopenharmony_ci file provide information about the configuration status 762306a36Sopenharmony_ci of Firmware Assisted Dump (FADump). 862306a36Sopenharmony_ci 962306a36Sopenharmony_ciWhat: /sys/kernel/fadump/enabled 1062306a36Sopenharmony_ciDate: Dec 2019 1162306a36Sopenharmony_ciContact: linuxppc-dev@lists.ozlabs.org 1262306a36Sopenharmony_ciDescription: read only 1362306a36Sopenharmony_ci Primarily used to identify whether the FADump is enabled in 1462306a36Sopenharmony_ci the kernel or not. 1562306a36Sopenharmony_ciUser: Kdump service 1662306a36Sopenharmony_ci 1762306a36Sopenharmony_ciWhat: /sys/kernel/fadump/registered 1862306a36Sopenharmony_ciDate: Dec 2019 1962306a36Sopenharmony_ciContact: linuxppc-dev@lists.ozlabs.org 2062306a36Sopenharmony_ciDescription: read/write 2162306a36Sopenharmony_ci Helps to control the dump collect feature from userspace. 2262306a36Sopenharmony_ci Setting 1 to this file enables the system to collect the 2362306a36Sopenharmony_ci dump and 0 to disable it. 2462306a36Sopenharmony_ciUser: Kdump service 2562306a36Sopenharmony_ci 2662306a36Sopenharmony_ciWhat: /sys/kernel/fadump/release_mem 2762306a36Sopenharmony_ciDate: Dec 2019 2862306a36Sopenharmony_ciContact: linuxppc-dev@lists.ozlabs.org 2962306a36Sopenharmony_ciDescription: write only 3062306a36Sopenharmony_ci This is a special sysfs file and only available when 3162306a36Sopenharmony_ci the system is booted to capture the vmcore using FADump. 3262306a36Sopenharmony_ci It is used to release the memory reserved by FADump to 3362306a36Sopenharmony_ci save the crash dump. 3462306a36Sopenharmony_ci 3562306a36Sopenharmony_ciWhat: /sys/kernel/fadump/mem_reserved 3662306a36Sopenharmony_ciDate: Dec 2019 3762306a36Sopenharmony_ciContact: linuxppc-dev@lists.ozlabs.org 3862306a36Sopenharmony_ciDescription: read only 3962306a36Sopenharmony_ci Provide information about the amount of memory reserved by 4062306a36Sopenharmony_ci FADump to save the crash dump in bytes. 41