# git rev-parse -q --verify 86de312343c4b56d699f8ed98aac8bdab1e94225^{commit} 86de312343c4b56d699f8ed98aac8bdab1e94225 already have revision, skipping fetch # git checkout -q -f -B kisskb 86de312343c4b56d699f8ed98aac8bdab1e94225 # git clean -qxdf # < git log -1 # commit 86de312343c4b56d699f8ed98aac8bdab1e94225 # Author: Nicholas Piggin # Date: Mon Jun 10 13:08:18 2019 +1000 # # powerpc/64s/radix: Enable HAVE_ARCH_HUGE_VMAP # # This sets the HAVE_ARCH_HUGE_VMAP option, and defines the required # page table functions. # # This enables huge (2MB and 1GB) ioremap mappings. I don't have a # benchmark for this change, but huge vmap will be used by a later core # kernel change to enable huge vmalloc memory mappings. This improves # cached `git diff` performance by about 5% on a 2-node POWER9 with 32MB # size dentry cache hash. # # Profiling git diff dTLB misses with a vanilla kernel: # # 81.75% git [kernel.vmlinux] [k] __d_lookup_rcu # 7.21% git [kernel.vmlinux] [k] strncpy_from_user # 1.77% git [kernel.vmlinux] [k] find_get_entry # 1.59% git [kernel.vmlinux] [k] kmem_cache_free # # 40,168 dTLB-miss # 0.100342754 seconds time elapsed # # With powerpc huge vmalloc: # # 2,987 dTLB-miss # 0.095933138 seconds time elapsed # # Signed-off-by: Nicholas Piggin # Signed-off-by: Michael Ellerman # < /opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version # < /opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-ld --version # < git log --format=%s --max-count=1 86de312343c4b56d699f8ed98aac8bdab1e94225 # < make -s -j 80 ARCH=powerpc O=/kisskb/build/powerpc-next_ppc6xx_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux- ppc6xx_defconfig # make -s -j 80 ARCH=powerpc O=/kisskb/build/powerpc-next_ppc6xx_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux- /kisskb/src/kernel/futex.c: In function 'do_futex': /kisskb/src/kernel/futex.c:1658:17: warning: 'oldval' may be used uninitialized in this function [-Wmaybe-uninitialized] return oldval == cmparg; ^ /kisskb/src/kernel/futex.c:1633:6: note: 'oldval' was declared here int oldval, ret; ^ In file included from /kisskb/src/sound/ppc/pmac.h:25:0, from /kisskb/src/sound/ppc/awacs.c:29: /kisskb/src/sound/ppc/awacs.c: In function 'snd_pmac_awacs_init': /kisskb/src/include/sound/control.h:223:9: warning: 'speaker_vol' may be used uninitialized in this function [-Wmaybe-uninitialized] return _snd_ctl_add_slave(master, slave, 0); ^ /kisskb/src/sound/ppc/awacs.c:886:36: note: 'speaker_vol' was declared here struct snd_kcontrol *master_vol, *speaker_vol; ^ INFO: Uncompressed kernel (size 0xb018d0) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xc00000) INFO: Uncompressed kernel (size 0xb018d0) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xc00000) INFO: Uncompressed kernel (size 0xb018d0) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xc00000) INFO: Uncompressed kernel (size 0xb018d0) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xc00000) INFO: Uncompressed kernel (size 0xb018d0) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xc00000) INFO: Uncompressed kernel (size 0xb018d0) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xc00000) INFO: Uncompressed kernel (size 0xb018d0) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xc00000) INFO: Uncompressed kernel (size 0xb018d0) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xc00000) INFO: Uncompressed kernel (size 0xb018d0) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xc00000) INFO: Uncompressed kernel (size 0xb018d0) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xc00000) INFO: Uncompressed kernel (size 0xaf11b8) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xb00000) INFO: Uncompressed kernel (size 0xaf11b8) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xb00000) Image Name: Linux-5.2.0-rc2+ Created: Sun Jun 16 23:13:53 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5287250 Bytes = 5163.33 KiB = 5.04 MiB Load Address: 00c00000 Entry Point: 00c00294 Image Name: Linux-5.2.0-rc2+ Created: Sun Jun 16 23:13:53 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5287385 Bytes = 5163.46 KiB = 5.04 MiB Load Address: 00c00000 Entry Point: 00c00294 Image Name: Linux-5.2.0-rc2+ Created: Sun Jun 16 23:13:53 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5287255 Bytes = 5163.33 KiB = 5.04 MiB Load Address: 00c00000 Entry Point: 00c00894 Image Name: Linux-5.2.0-rc2+ Created: Sun Jun 16 23:13:53 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5287497 Bytes = 5163.57 KiB = 5.04 MiB Load Address: 00c00000 Entry Point: 00c00294 Image Name: Linux-5.2.0-rc2+ Created: Sun Jun 16 23:13:53 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5287451 Bytes = 5163.53 KiB = 5.04 MiB Load Address: 00c00000 Entry Point: 00c00294 Image Name: Linux-5.2.0-rc2+ Created: Sun Jun 16 23:13:53 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5286820 Bytes = 5162.91 KiB = 5.04 MiB Load Address: 00c00000 Entry Point: 00c00894 Image Name: Linux-5.2.0-rc2+ Created: Sun Jun 16 23:13:53 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5287511 Bytes = 5163.58 KiB = 5.04 MiB Load Address: 00c00000 Entry Point: 00c00294 Image Name: Linux-5.2.0-rc2+ Created: Sun Jun 16 23:13:53 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5287477 Bytes = 5163.55 KiB = 5.04 MiB Load Address: 00c00000 Entry Point: 00c00294 Image Name: Linux-5.2.0-rc2+ Created: Sun Jun 16 23:13:54 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5257362 Bytes = 5134.14 KiB = 5.01 MiB Load Address: 00000000 Entry Point: 00000000 Completed OK # rm -rf /kisskb/build/powerpc-next_ppc6xx_defconfig_powerpc-gcc5 # Build took: 0:03:19.420817