Lines Matching refs:kernel

21   for dump, with a single operation of echo 1 > /sys/kernel/fadump_release_mem.
22 - Once enabled through kernel boot parameter, fadump can be
23   started/stopped through /sys/kernel/fadump_registered interface (see
31    with a fresh copy of the kernel.  In particular,
35    is immediately available to the running kernel. And therefore,
43 -- The first kernel registers the sections of memory with the
46    kernel during early boot.
54          that is required for a kernel to boot successfully when
61          kernel to boot successfully.
68 -- The freshly booted kernel will notice that there is a new
69    node (ibm,dump-kernel) in the device tree, indicating that
73    size. This will make sure that the second kernel will not
77    of memory, which holds the previous crashed kernel dump in ELF
82    '1' to /sys/kernel/fadump_release_mem to release the reserved
87      # echo 1 > /sys/kernel/fadump_release_mem
103 /sys/kernel/fadump_release_mem file is created, and the reserved
114   o Memory Reservation during first kernel
132   o Memory Reservation during second kernel after crash
144    kernel to boot
159 1. Set config option CONFIG_FA_DUMP=y and build kernel.
160 2. Boot into linux kernel with 'fadump=on' kernel cmdline option.
161 3. Optionally, user can also set 'fadump_reserve_mem=' kernel cmdline
167    is set at kernel cmdline.
175 Here is the list of files under kernel sysfs:
177  /sys/kernel/fadump_enabled
184     fadump is enabled in the kernel and act accordingly.
186  /sys/kernel/fadump_registered
193     To register fadump echo 1 > /sys/kernel/fadump_registered and
194     echo 0 > /sys/kernel/fadump_registered for un-register and stop the
199  /sys/kernel/fadump_release_mem
202     second kernel. This is used to release the reserved memory
206     echo 1  > /sys/kernel/fadump_release_mem
208     After echo 1, the content of the /sys/kernel/debug/powerpc/fadump_region
216 (Assuming debugfs is mounted on /sys/kernel/debug directory.)
218  /sys/kernel/debug/powerpc/fadump_region
226     Contents when fadump is registered during first kernel
228     # cat /sys/kernel/debug/powerpc/fadump_region
233     Contents when fadump is active during second kernel
235     # cat /sys/kernel/debug/powerpc/fadump_region
248    accurate boot memory size that is required for a kernel to
253    kernel which will help second kernel to populate ELF core header with