# git rev-parse -q --verify 8f0c636b05429d3a83993074c35fce62eb9856ef^{commit}
8f0c636b05429d3a83993074c35fce62eb9856ef
already have revision, skipping fetch
# git checkout -q -f -B kisskb 8f0c636b05429d3a83993074c35fce62eb9856ef
# git clean -qxdf
# < git log -1
# commit 8f0c636b05429d3a83993074c35fce62eb9856ef
# Author: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
# Date:   Thu Sep 20 14:03:58 2018 +0530
# 
#     powerpc/mm: Increase the max addressable memory to 2PB
#     
#     Currently we limit the max addressable memory to 128TB. This patch increase the
#     limit to 2PB. We can have devices like nvdimm which adds memory above 512TB
#     limit.
#     
#     We still don't support regular system ram above 512TB. One of the challenge with
#     that is the percpu allocator, that allocates per node memory and use the max
#     distance between them as the percpu offsets. This means with large gap in
#     address space ( system ram above 1PB) we will run out of vmalloc space to map
#     the percpu allocation.
#     
#     In order to support addressable memory above 512TB, kernel should be able to
#     linear map this range. To do that with hash translation we now add 4 context
#     to kernel linear map region. Our per context addressable range is 512TB. We
#     still keep VMALLOC and VMEMMAP region to old size. SLB miss handlers is updated
#     to validate these limit.
#     
#     We also limit this update to SPARSEMEM_VMEMMAP and SPARSEMEM_EXTREME
#     
#     Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
# < /opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version
# < git log --format=%s --max-count=1 8f0c636b05429d3a83993074c35fce62eb9856ef
# < make -s -j 120 ARCH=powerpc O=/kisskb/build/powerpc-next_85xx_socrates_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  85xx/socrates_defconfig
# make -s -j 120 ARCH=powerpc O=/kisskb/build/powerpc-next_85xx_socrates_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  
INFO: Uncompressed kernel (size 0x583ba8) overlaps the address of the wrapper(0x400000)
INFO: Fixing the link_address of wrapper to (0x600000)
Image Name:   Linux-4.19.0-rc3-g8f0c636b0542
Created:      Sun Oct 14 01:18:50 2018
Image Type:   PowerPC Linux Kernel Image (gzip compressed)
Data Size:    2855320 Bytes = 2788.40 KiB = 2.72 MiB
Load Address: 00000000
Entry Point:  00000000
Completed OK
# rm -rf /kisskb/build/powerpc-next_85xx_socrates_defconfig_powerpc-gcc5
# Build took: 0:00:16.447715