# git rev-parse -q --verify eaa567ccaf3a2a7b14ffa38af4bd09613aa1830f^{commit}
eaa567ccaf3a2a7b14ffa38af4bd09613aa1830f
already have revision, skipping fetch
# git checkout -q -f -B kisskb eaa567ccaf3a2a7b14ffa38af4bd09613aa1830f
# git clean -qxdf
# < git log -1
# commit eaa567ccaf3a2a7b14ffa38af4bd09613aa1830f
# Author: Hari Bathini <hbathini@linux.ibm.com>
# Date:   Mon Jul 27 01:10:28 2020 +0530
# 
#     ppc64/kexec_file: fix kexec load failure with lack of memory hole
#     
#     The kexec purgatory has to run in real mode. Only the first memory
#     block maybe accessible in real mode. And, unlike the case with panic
#     kernel, no memory is set aside for regular kexec load. Another thing
#     to note is, the memory for crashkernel is reserved at an offset of
#     128MB. So, when crashkernel memory is reserved, the memory ranges to
#     load kexec segments shrink further as the generic code only looks for
#     memblock free memory ranges and in all likelihood only a tiny bit of
#     memory from 0 to 128MB would be available to load kexec segments.
#     
#     With kdump being used by default in general, kexec file load is likely
#     to fail almost always. This can be fixed by changing the memory hole
#     lookup logic for regular kexec to use the same method as kdump. This
#     would mean that most kexec segments will overlap with crashkernel
#     memory region. That should still be ok as the pages, whose destination
#     address isn't available while loading, are placed in an intermediate
#     location till a flush to the actual destination address happens during
#     kexec boot sequence.
#     
#     Signed-off-by: Hari Bathini <hbathini@linux.ibm.com>
#     Tested-by: Pingfan Liu <piliu@redhat.com>
#     Reviewed-by: Thiago Jung Bauermann <bauerman@linux.ibm.com>
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
#     Link: https://lore.kernel.org/r/159579242226.5790.13933486642004084417.stgit@hbathini
# < /opt/cross/kisskb/korg/gcc-9.2.0-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-9.2.0-nolibc/powerpc64-linux/bin/powerpc64-linux-ld --version
# < git log --format=%s --max-count=1 eaa567ccaf3a2a7b14ffa38af4bd09613aa1830f
# < make -s -j 80 ARCH=powerpc O=/kisskb/build/powerpc-next_powernv_defconfig+NO_RADIX_powerpc-gcc9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-9.2.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  powernv_defconfig
# Added to kconfig CONFIG_PPC_RADIX_MMU=n
# < make -s -j 80 ARCH=powerpc O=/kisskb/build/powerpc-next_powernv_defconfig+NO_RADIX_powerpc-gcc9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-9.2.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  help
# make -s -j 80 ARCH=powerpc O=/kisskb/build/powerpc-next_powernv_defconfig+NO_RADIX_powerpc-gcc9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-9.2.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  olddefconfig
# make -s -j 80 ARCH=powerpc O=/kisskb/build/powerpc-next_powernv_defconfig+NO_RADIX_powerpc-gcc9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-9.2.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  
Completed OK
# rm -rf /kisskb/build/powerpc-next_powernv_defconfig+NO_RADIX_powerpc-gcc9
# Build took: 0:03:46.952394