# git rev-parse -q --verify d909f9109c301f4e9e41678025c45d719ab8f7d7^{commit} d909f9109c301f4e9e41678025c45d719ab8f7d7 already have revision, skipping fetch # git checkout -q -f -B kisskb d909f9109c301f4e9e41678025c45d719ab8f7d7 # git clean -qxdf # < git log -1 # commit d909f9109c301f4e9e41678025c45d719ab8f7d7 # 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/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-gcc --version # < /opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-ld --version # < git log --format=%s --max-count=1 d909f9109c301f4e9e41678025c45d719ab8f7d7 # < make -s -j 24 ARCH=powerpc O=/kisskb/build/powerpc-next-rand_powerpc-randconfig_powerpc-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux- randconfig KCONFIG_SEED=0xFDFF92B6 # Added to kconfig CONFIG_STANDALONE=y # Added to kconfig CONFIG_BUILD_DOCSRC=n # Added to kconfig CONFIG_MODULE_SIG=n # Added to kconfig CONFIG_CPU_BIG_ENDIAN=y # Added to kconfig CONFIG_PPC64=y # Added to kconfig CONFIG_PPC_DISABLE_WERROR=y # Added to kconfig CONFIG_SECTION_MISMATCH_WARN_ONLY=y # Added to kconfig CONFIG_PREVENT_FIRMWARE_BUILD=y # Added to kconfig CONFIG_CC_STACKPROTECTOR_STRONG=n # Added to kconfig CONFIG_GCC_PLUGINS=n # Added to kconfig CONFIG_LD_HEAD_STUB_CATCH=y # Added to kconfig CONFIG_TRIM_UNUSED_KSYMS=n # Added to kconfig CONFIG_UBSAN=n # yes \n | make -s -j 24 ARCH=powerpc O=/kisskb/build/powerpc-next-rand_powerpc-randconfig_powerpc-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux- oldconfig yes: standard output: Broken pipe # make -s -j 24 ARCH=powerpc O=/kisskb/build/powerpc-next-rand_powerpc-randconfig_powerpc-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux- /kisskb/src/ipc/shm.c: In function 'ksys_shmdt': /kisskb/src/ipc/shm.c:1712:59: warning: 'file' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/sound/hda/hdac_regmap.c: In function 'hda_reg_write': /kisskb/src/sound/hda/hdac_regmap.c:283:16: warning: 'err' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/arch/powerpc/kernel/eeh.c:1792:12: warning: 'proc_eeh_show' defined but not used [-Wunused-function] /kisskb/src/kernel/locking/lockdep.c:2821:13: warning: 'print_lock_trace' defined but not used [-Wunused-function] /kisskb/src/drivers/char/ipmi/ipmi_si_hotmod.c: In function 'hotmod_handler': /kisskb/src/drivers/char/ipmi/ipmi_si_hotmod.c:219:6: warning: 'op' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/kernel/printk/printk.c: In function 'devkmsg_sysctl_set_loglvl': /kisskb/src/kernel/printk/printk.c:194:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/kernel/rcu/srcutree.c: In function 'init_srcu_struct_fields': /kisskb/src/kernel/rcu/srcutree.c:140:32: warning: 'levelspread[]' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/kernel/rcu/srcutree.c:88:6: note: 'levelspread[]' was declared here /kisskb/src/mm/vmalloc.c: In function 'pcpu_get_vm_areas': /kisskb/src/mm/vmalloc.c:976:28: warning: 'lva' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/mm/vmalloc.c:916:20: note: 'lva' was declared here /kisskb/src/lib/mpi/mpicoder.c: In function 'mpi_read_raw_from_sgl': /kisskb/src/lib/mpi/mpicoder.c:352:8: warning: 'buff' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/sound/pci/atiixp_modem.c: In function 'snd_atiixp_probe': /kisskb/src/sound/pci/atiixp_modem.c:489:2: warning: 'chip' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/sound/pci/atiixp_modem.c:1268:23: note: 'chip' was declared here /kisskb/src/sound/pci/via82xx_modem.c: In function 'snd_via82xx_probe': /kisskb/src/sound/pci/via82xx_modem.c:1191:22: warning: 'chip' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/lib/rhashtable.c: In function 'rht_deferred_worker': /kisskb/src/include/linux/rhashtable.h:110:10: warning: 'next' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/lib/rhashtable.c:225:28: note: 'next' was declared here /kisskb/src/drivers/hwspinlock/hwspinlock_core.c: In function 'of_hwspin_lock_get_id': /kisskb/src/drivers/hwspinlock/hwspinlock_core.c:329:6: warning: 'ret' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/hwtracing/intel_th/msu.c: In function 'msc_buffer_win_alloc': /kisskb/src/drivers/hwtracing/intel_th/msu.c:783:21: warning: unused variable 'i' [-Wunused-variable] /kisskb/src/drivers/hwtracing/intel_th/msu.c: In function 'msc_buffer_win_free': /kisskb/src/drivers/hwtracing/intel_th/msu.c:863:6: warning: unused variable 'i' [-Wunused-variable] /kisskb/src/drivers/macintosh/via-pmu.c:864:12: warning: 'pmu_info_proc_show' defined but not used [-Wunused-function] /kisskb/src/drivers/macintosh/via-pmu.c:875:12: warning: 'pmu_irqstats_proc_show' defined but not used [-Wunused-function] /kisskb/src/drivers/macintosh/via-pmu.c:901:12: warning: 'pmu_battery_proc_show' defined but not used [-Wunused-function] /kisskb/src/drivers/input/touchscreen/goodix.c: In function 'goodix_ts_probe': /kisskb/src/drivers/input/touchscreen/goodix.c:855:5: warning: 'error' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/input/touchscreen/s6sy761.c: In function 's6sy761_probe': /kisskb/src/drivers/input/touchscreen/s6sy761.c:437:22: warning: 'max_y' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/input/touchscreen/s6sy761.c:436:22: warning: 'max_x' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/gpu/drm/amd/amdgpu/soc15.c: In function 'soc15_set_ip_blocks': /kisskb/src/drivers/gpu/drm/amd/amdgpu/soc15.c:630:3: warning: #warning "Enable CONFIG_DRM_AMD_DC for display support on SOC15." [-Wcpp] /kisskb/src/drivers/gpu/drm/amd/amdgpu/soc15.c:652:3: warning: #warning "Enable CONFIG_DRM_AMD_DC for display support on SOC15." [-Wcpp] /kisskb/src/lib/kobject_uevent.c: In function 'kobject_synth_uevent': /kisskb/src/lib/kobject_uevent.c:222:39: warning: 'env' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/lib/kobject_uevent.c:133:47: warning: 'action_args' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/lib/kobject_uevent.c:196:14: note: 'action_args' was declared here /kisskb/src/lib/radix-tree.c: In function 'radix_tree_insert': /kisskb/src/lib/radix-tree.c:104:23: warning: 'slot' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/lib/radix-tree.c:729:15: note: 'slot' was declared here /kisskb/src/include/asm-generic/bitops/non-atomic.h:106:20: warning: 'node' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/lib/radix-tree.c:728:26: note: 'node' was declared here /kisskb/src/drivers/input/touchscreen/wdt87xx_i2c.c: In function 'wdt87xx_update_firmware': /kisskb/src/drivers/input/touchscreen/wdt87xx_i2c.c:752:7: warning: 'device_checksum' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/input/touchscreen/wdt87xx_i2c.c:695:6: note: 'device_checksum' was declared here /kisskb/src/drivers/gpu/drm/scheduler/sched_main.c: In function 'drm_sched_resubmit_jobs': /kisskb/src/drivers/gpu/drm/scheduler/sched_main.c:475:20: warning: 'guilty_context' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/gpu/drm/drm_dp_mst_topology.c: In function 'drm_dp_sideband_msg_build': /kisskb/src/drivers/gpu/drm/drm_dp_mst_topology.c:423:23: warning: 'hdrlen' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/video/backlight/adp8860_bl.c: In function 'adp8860_bl_ambient_light_zone_show': /kisskb/src/drivers/video/backlight/adp8860_bl.c:601:32: warning: 'reg_val' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/video/backlight/adp8860_bl.c: In function 'adp8860_bl_ambient_light_level_show': /kisskb/src/drivers/video/backlight/adp8860_bl.c:579:10: warning: 'reg_val' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/video/backlight/adp8860_bl.c:579:10: warning: 'ret_val' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/video/backlight/adp8860_bl.c: In function 'adp8860_show': /kisskb/src/drivers/video/backlight/adp8860_bl.c:443:16: warning: 'reg_val' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/gpu/drm/nouveau/nvkm/subdev/bios/power_budget.c: In function 'nvbios_power_budget_header': /kisskb/src/drivers/gpu/drm/nouveau/nvkm/subdev/bios/power_budget.c:94:15: warning: 'len' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/gpu/drm/nouveau/nvkm/subdev/bios/power_budget.c:84:5: warning: 'cnt' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/gpu/drm/nouveau/nvkm/subdev/bios/power_budget.c:93:15: warning: 'hdr' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/gpu/drm/nouveau/nvkm/subdev/bios/power_budget.c:92:14: warning: 'ver' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/gpu/drm/drm_atomic.c: In function 'drm_atomic_check_only': /kisskb/src/drivers/gpu/drm/drm_atomic.c:420:38: warning: 'crtc_state' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/gpu/drm/drm_atomic.c:399:25: note: 'crtc_state' was declared here /kisskb/src/drivers/gpu/drm/nouveau/nvkm/subdev/i2c/auxg94.c: In function 'g94_i2c_aux_xfer': /kisskb/src/drivers/gpu/drm/nouveau/nvkm/subdev/i2c/auxg94.c:160:31: warning: 'stat' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/gpu/drm/nouveau/nvkm/subdev/i2c/auxgm200.c: In function 'gm200_i2c_aux_xfer': /kisskb/src/drivers/gpu/drm/nouveau/nvkm/subdev/i2c/auxgm200.c:160:31: warning: 'stat' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/gpu/drm/nouveau/nvkm/subdev/top/gk104.c: In function 'gk104_top_oneinit': /kisskb/src/drivers/gpu/drm/nouveau/nvkm/subdev/top/gk104.c:92:20: warning: 'inst' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/gpu/drm/nouveau/nvkm/subdev/top/gk104.c:77:3: warning: 'type' may be used uninitialized in this function [-Wuninitialized] Completed OK # rm -rf /kisskb/build/powerpc-next-rand_powerpc-randconfig_powerpc-gcc4.6 # Build took: 0:06:34.908977