Buildresult: powerpc-next/cell_defconfig/powerpc-gcc4.6 built on Sep 2 2017, 06:52
kisskb
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Status:
Failed
Date/Time:
Sep 2 2017, 06:52
Duration:
0:00:15.700711
Builder:
ka3
Revision:
powerpc: Rewrite local_t using soft_irq (
64214e28edc846b4277c422451d7a361b80779d2)
Target:
powerpc-next/cell_defconfig/powerpc-gcc4.6
Branch:
powerpc-next
Compiler:
powerpc-gcc4.6
(powerpc-linux-gcc (GCC) 4.6.3)
Config:
cell_defconfig
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Log:
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Possible errors
/home/kisskb/slave/src/arch/powerpc/lib/sstep.c:2758:23: error: 'val' may be used uninitialized in this function [-Werror=uninitialized] cc1: all warnings being treated as errors make[2]: *** [arch/powerpc/lib/sstep.o] Error 1 make[1]: *** [arch/powerpc/lib] Error 2 make: *** [sub-make] Error 2
No warnings found in log.
Full Log
# git rev-parse -q --verify 64214e28edc846b4277c422451d7a361b80779d2^{commit} 64214e28edc846b4277c422451d7a361b80779d2 already have revision, skipping fetch # git checkout -q -f -B kisskb 64214e28edc846b4277c422451d7a361b80779d2 # git clean -qxdf # git log -1 commit 64214e28edc846b4277c422451d7a361b80779d2 Author: Madhavan Srinivasan <maddy@linux.vnet.ibm.com> Date: Sun Aug 20 23:28:31 2017 +0530 powerpc: Rewrite local_t using soft_irq Local atomic operations are fast and highly reentrant per CPU counters. Used for percpu variable updates. Local atomic operations only guarantee variable modification atomicity wrt the CPU which owns the data and these needs to be executed in a preemption safe way. Here is the design of this patch. Since local_* operations are only need to be atomic to interrupts (IIUC), we have two options. Either replay the "op" if interrupted or replay the interrupt after the "op". Initial patchset posted was based on implementing local_* operation based on CR5 which replay's the "op". Patchset had issues in case of rewinding the address pointor from an array. This make the slow path really slow. Since CR5 based implementation proposed using __ex_table to find the rewind addressr, this rasied concerns about size of __ex_table and vmlinux. https://lists.ozlabs.org/pipermail/linuxppc-dev/2014-December/123115.html But this patch uses, powerpc_local_irq_pmu_save to soft_disable interrupts (including PMIs). After finishing the "op", powerpc_local_irq_pmu_restore() called and correspondingly interrupts are replayed if any occured. patch re-write the current local_* functions to use arch_local_irq_disable. Base flow for each function is: { powerpc_local_irq_pmu_save(flags) load .. store powerpc_local_irq_pmu_restore(flags) } Reason for the approach is that, currently l[w/d]arx/st[w/d]cx. instruction pair is used for local_* operations, which are heavy on cycle count and they dont support a local variant. So to see whether the new implementation helps, used a modified version of Rusty's benchmark code on local_t. https://lkml.org/lkml/2008/12/16/450 Modifications to Rusty's benchmark code: - Executed only local_t test Here are the values with the patch. Time in ns per iteration Local_t Without Patch With Patch _inc 38 10 _add 38 10 _read 4 4 _add_return 38 10 Currently only asm/local.h has been rewritten, and also the entire change is tested only in PPC64 (pseries guest) and PPC64 host (LE) Patch convert the inline asm implementation of the local_t to C. Also removed the local_dec_if_positive since there are no users for this. Reviewed-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Madhavan Srinivasan <maddy@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> # < /opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-gcc --version # < git log --format=%s --max-count=1 64214e28edc846b4277c422451d7a361b80779d2 # < make -j 10 ARCH=powerpc O=/home/kisskb/slave/build/powerpc-next_cell_defconfig_powerpc CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux- cell_defconfig # make -j 10 ARCH=powerpc O=/home/kisskb/slave/build/powerpc-next_cell_defconfig_powerpc CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux- make[1]: Entering directory '/home/kisskb/slave/build/powerpc-next_cell_defconfig_powerpc' GEN ./Makefile scripts/kconfig/conf --silentoldconfig Kconfig CHK include/config/kernel.release GEN ./Makefile WRAP arch/powerpc/include/generated/uapi/asm/param.h WRAP arch/powerpc/include/generated/uapi/asm/poll.h WRAP arch/powerpc/include/generated/uapi/asm/resource.h WRAP arch/powerpc/include/generated/uapi/asm/sockios.h WRAP arch/powerpc/include/generated/uapi/asm/statfs.h CHK include/generated/uapi/linux/version.h UPD include/generated/uapi/linux/version.h HOSTCC scripts/basic/bin2c UPD include/config/kernel.release Using /home/kisskb/slave/src as source for kernel WRAP arch/powerpc/include/generated/asm/clkdev.h WRAP arch/powerpc/include/generated/asm/div64.h WRAP arch/powerpc/include/generated/asm/export.h WRAP arch/powerpc/include/generated/asm/irq_regs.h WRAP arch/powerpc/include/generated/asm/irq_work.h WRAP arch/powerpc/include/generated/asm/local64.h WRAP arch/powerpc/include/generated/asm/mcs_spinlock.h WRAP arch/powerpc/include/generated/asm/preempt.h WRAP arch/powerpc/include/generated/asm/rwsem.h WRAP arch/powerpc/include/generated/asm/vtime.h WRAP arch/powerpc/include/generated/asm/msi.h CHK include/generated/utsrelease.h UPD include/generated/utsrelease.h HOSTCC scripts/dtc/dtc.o HOSTCC scripts/dtc/flattree.o CC scripts/mod/empty.o HOSTCC scripts/dtc/fstree.o HOSTCC scripts/mod/mk_elfconfig CC scripts/mod/devicetable-offsets.s HOSTCC scripts/dtc/data.o HOSTCC scripts/kallsyms HOSTCC scripts/conmakehash HOSTCC scripts/sortextable CHK scripts/mod/devicetable-offsets.h HOSTCC scripts/dtc/livetree.o UPD scripts/mod/devicetable-offsets.h MKELF scripts/mod/elfconfig.h HOSTCC scripts/mod/modpost.o HOSTCC scripts/dtc/treesource.o HOSTCC scripts/dtc/srcpos.o HOSTCC scripts/dtc/checks.o HOSTCC scripts/mod/file2alias.o CC kernel/bounds.s HOSTCC scripts/dtc/util.o SHIPPED scripts/dtc/dtc-lexer.lex.c SHIPPED scripts/dtc/dtc-parser.tab.h SHIPPED scripts/dtc/dtc-parser.tab.c HOSTCC scripts/mod/sumversion.o CHK include/generated/timeconst.h HOSTCC scripts/dtc/dtc-lexer.lex.o UPD include/generated/timeconst.h CHK include/generated/bounds.h UPD include/generated/bounds.h CC arch/powerpc/kernel/asm-offsets.s HOSTCC scripts/dtc/dtc-parser.tab.o CHK include/generated/asm-offsets.h UPD include/generated/asm-offsets.h CALL /home/kisskb/slave/src/scripts/checksyscalls.sh HOSTLD scripts/dtc/dtc HOSTLD scripts/mod/modpost CC init/main.o CHK include/generated/compile.h CC init/do_mounts.o HOSTCC usr/gen_init_cpio CC init/do_mounts_rd.o CC init/do_mounts_initrd.o CC init/initramfs.o CC init/init_task.o UPD include/generated/compile.h CC arch/powerpc/mm/fault.o AS arch/powerpc/lib/string.o CC arch/powerpc/kernel/cputable.o CC arch/powerpc/lib/alloc.o GEN usr/initramfs_data.cpio AS usr/initramfs_data.o CC arch/powerpc/lib/code-patching.o AR usr/built-in.o CC arch/powerpc/lib/feature-fixups.o CC arch/powerpc/kernel/ptrace.o CC arch/powerpc/kernel/syscalls.o CC arch/powerpc/kernel/irq.o AS arch/powerpc/lib/checksum_64.o CC arch/powerpc/lib/checksum_wrappers.o CC arch/powerpc/sysdev/mpic.o CC arch/powerpc/mm/mem.o CC arch/powerpc/lib/sstep.o CC arch/powerpc/mm/pgtable.o CC arch/powerpc/mm/mmap.o CC arch/powerpc/mm/init_64.o CC arch/powerpc/mm/pgtable_64.o CC init/version.o AR init/mounts.o CC arch/powerpc/mm/init-common.o AR init/built-in.o CC arch/powerpc/mm/mmu_context.o CC arch/powerpc/kernel/align.o CC arch/powerpc/mm/pgtable-hash64.o CC arch/powerpc/platforms/cell/cbe_regs.o CC arch/powerpc/platforms/ps3/setup.o CC arch/powerpc/platforms/cell/interrupt.o CC arch/powerpc/platforms/cell/pervasive.o CC arch/powerpc/sysdev/mmio_nvram.o CC arch/powerpc/sysdev/dcr.o CC arch/powerpc/kernel/signal_32.o CC arch/powerpc/kernel/pmc.o CC arch/powerpc/mm/hash_utils_64.o AR arch/powerpc/math-emu/built-in.o /home/kisskb/slave/src/arch/powerpc/lib/sstep.c: In function 'emulate_loadstore': /home/kisskb/slave/src/arch/powerpc/lib/sstep.c:2758:23: error: 'val' may be used uninitialized in this function [-Werror=uninitialized] CC arch/powerpc/kernel/vdso.o AR arch/powerpc/crypto/built-in.o cc1: all warnings being treated as errors CC arch/powerpc/kernel/process.o CC arch/powerpc/platforms/ps3/mm.o /home/kisskb/slave/src/scripts/Makefile.build:302: recipe for target 'arch/powerpc/lib/sstep.o' failed make[2]: *** [arch/powerpc/lib/sstep.o] Error 1 /home/kisskb/slave/src/Makefile:1019: recipe for target 'arch/powerpc/lib' failed make[1]: *** [arch/powerpc/lib] Error 2 make[1]: *** Waiting for unfinished jobs.... CC arch/powerpc/platforms/ps3/time.o CC [M] arch/powerpc/sysdev/axonram.o CC arch/powerpc/platforms/cell/iommu.o AS arch/powerpc/platforms/ps3/hvcall.o CC arch/powerpc/platforms/ps3/htab.o CPP arch/powerpc/kernel/systbl_chk.i CC arch/powerpc/platforms/cell/setup.o AR arch/powerpc/sysdev/built-in.o CC arch/powerpc/platforms/cell/spider-pic.o CC arch/powerpc/platforms/cell/pmu.o CC arch/powerpc/platforms/cell/spider-pci.o AS arch/powerpc/mm/slb_low.o CC arch/powerpc/kernel/idle.o CC arch/powerpc/platforms/cell/ras.o CC arch/powerpc/platforms/ps3/repository.o CC arch/powerpc/platforms/ps3/interrupt.o CC arch/powerpc/kernel/signal.o CC arch/powerpc/kernel/sysfs.o CC arch/powerpc/platforms/cell/smp.o CC arch/powerpc/mm/slb.o CC arch/powerpc/platforms/ps3/exports.o CC arch/powerpc/mm/hash_native_64.o CC arch/powerpc/platforms/cell/spu_callbacks.o CC arch/powerpc/mm/mmu_context_book3s64.o CC arch/powerpc/platforms/ps3/os-area.o CC arch/powerpc/platforms/cell/spu_base.o CC arch/powerpc/platforms/cell/spu_notify.o CC arch/powerpc/platforms/ps3/system-bus.o CC arch/powerpc/platforms/cell/spu_syscalls.o CC arch/powerpc/kernel/cacheinfo.o CC arch/powerpc/kernel/time.o CC arch/powerpc/platforms/ps3/smp.o CC arch/powerpc/kernel/prom.o CC arch/powerpc/mm/pgtable-book3s64.o CC arch/powerpc/mm/pgtable-radix.o CC arch/powerpc/mm/tlb-radix.o CC arch/powerpc/mm/tlb_hash64.o CC arch/powerpc/platforms/cell/spu_priv1_mmio.o CC arch/powerpc/platforms/cell/spu_manage.o CC arch/powerpc/platforms/ps3/spu.o CC arch/powerpc/platforms/ps3/device-init.o CC arch/powerpc/mm/hash64_64k.o CC arch/powerpc/mm/numa.o CC arch/powerpc/kernel/traps.o CC arch/powerpc/kernel/setup-common.o CC arch/powerpc/mm/slice.o CC [M] arch/powerpc/platforms/cell/cbe_thermal.o AR arch/powerpc/platforms/cell/spufs/built-in.o CC [M] arch/powerpc/platforms/cell/spufs/inode.o CC [M] arch/powerpc/platforms/cell/spufs/file.o CC arch/powerpc/kernel/udbg.o AS arch/powerpc/kernel/misc.o CC arch/powerpc/mm/hugetlbpage.o AR arch/powerpc/platforms/ps3/built-in.o CC arch/powerpc/mm/hugetlbpage-hash64.o CC [M] arch/powerpc/platforms/cell/spufs/context.o CC [M] arch/powerpc/platforms/cell/cpufreq_spudemand.o CC arch/powerpc/mm/hugetlbpage-radix.o CC arch/powerpc/kernel/io.o CC arch/powerpc/kernel/dma.o CC [M] arch/powerpc/platforms/cell/spufs/syscalls.o CC arch/powerpc/mm/copro_fault.o AS arch/powerpc/kernel/misc_64.o CC arch/powerpc/kernel/of_platform.o CC arch/powerpc/kernel/prom_parse.o CC arch/powerpc/kernel/setup_64.o CC [M] arch/powerpc/platforms/cell/spufs/sched.o CC [M] arch/powerpc/platforms/cell/spufs/backing_ops.o CC [M] arch/powerpc/platforms/cell/spufs/hw_ops.o CC [M] arch/powerpc/platforms/cell/spufs/run.o CC arch/powerpc/kernel/sys_ppc32.o AR arch/powerpc/mm/built-in.o CC arch/powerpc/kernel/signal_64.o CC [M] arch/powerpc/platforms/cell/spufs/gang.o SHIPPED arch/powerpc/platforms/cell/spufs/spu_save_dump.h CC arch/powerpc/kernel/ptrace32.o SHIPPED arch/powerpc/platforms/cell/spufs/spu_restore_dump.h CC arch/powerpc/kernel/paca.o CC arch/powerpc/kernel/nvram_64.o CC [M] arch/powerpc/platforms/cell/spufs/fault.o CC arch/powerpc/kernel/firmware.o CC [M] arch/powerpc/platforms/cell/spufs/lscsa_alloc.o CC arch/powerpc/kernel/trace/trace_clock.o LDS arch/powerpc/kernel/vdso32/vdso32.lds VDSO32A arch/powerpc/kernel/vdso32/sigtramp.o VDSO32A arch/powerpc/kernel/vdso32/gettimeofday.o AR arch/powerpc/kernel/trace/built-in.o VDSO32A arch/powerpc/kernel/vdso32/datapage.o LDS arch/powerpc/kernel/vdso64/vdso64.lds VDSO32A arch/powerpc/kernel/vdso32/cacheflush.o AS arch/powerpc/kernel/vdso64/sigtramp.o VDSO32A arch/powerpc/kernel/vdso32/note.o AS arch/powerpc/kernel/vdso64/gettimeofday.o CC arch/powerpc/kernel/hw_breakpoint.o VDSO32A arch/powerpc/kernel/vdso32/getcpu.o AS arch/powerpc/kernel/cpu_setup_ppc970.o AS arch/powerpc/kernel/vdso64/datapage.o VDSO32L arch/powerpc/kernel/vdso32/vdso32.so.dbg OBJCOPY arch/powerpc/kernel/vdso32/vdso32.so AS arch/powerpc/kernel/vdso64/cacheflush.o CC [M] arch/powerpc/platforms/cell/spufs/coredump.o AS arch/powerpc/kernel/vdso32/vdso32_wrapper.o AS arch/powerpc/kernel/vdso64/note.o AR arch/powerpc/kernel/vdso32/built-in.o AS arch/powerpc/kernel/cpu_setup_pa6t.o AS arch/powerpc/kernel/vdso64/getcpu.o AS arch/powerpc/kernel/cpu_setup_power.o VDSO64L arch/powerpc/kernel/vdso64/vdso64.so.dbg CC arch/powerpc/kernel/mce.o CC arch/powerpc/kernel/mce_power.o CC arch/powerpc/kernel/vecemu.o OBJCOPY arch/powerpc/kernel/vdso64/vdso64.so AS arch/powerpc/kernel/vdso64/vdso64_wrapper.o AR arch/powerpc/kernel/vdso64/built-in.o CC [M] arch/powerpc/platforms/cell/spufs/switch.o CC arch/powerpc/kernel/proc_powerpc.o CC arch/powerpc/kernel/rtas.o CC arch/powerpc/kernel/rtas-rtc.o CC arch/powerpc/kernel/rtas_pci.o CC arch/powerpc/kernel/rtas_flash.o CC arch/powerpc/kernel/rtas-proc.o CC arch/powerpc/kernel/dt_cpu_ftrs.o CC arch/powerpc/kernel/module.o CC arch/powerpc/kernel/module_64.o CC arch/powerpc/kernel/dma-iommu.o CC arch/powerpc/kernel/iommu.o CC arch/powerpc/kernel/smp.o CC arch/powerpc/kernel/uprobes.o CC arch/powerpc/kernel/legacy_serial.o CC arch/powerpc/kernel/udbg_16550.o CC arch/powerpc/kernel/stacktrace.o CC arch/powerpc/kernel/pci_64.o CC arch/powerpc/kernel/pci_dn.o CC arch/powerpc/kernel/pci-hotplug.o CC arch/powerpc/kernel/isa-bridge.o CC arch/powerpc/kernel/pci-common.o LD [M] arch/powerpc/platforms/cell/spufs/spufs.o AR arch/powerpc/platforms/cell/built-in.o AR arch/powerpc/platforms/built-in.o CC arch/powerpc/kernel/pci_of_scan.o CC arch/powerpc/kernel/io-workarounds.o AS arch/powerpc/kernel/ppc_save_regs.o CC arch/powerpc/kernel/prom_init.o AS arch/powerpc/kernel/head_64.o LDS arch/powerpc/kernel/vmlinux.lds AS arch/powerpc/kernel/fpu.o AS arch/powerpc/kernel/vector.o AS arch/powerpc/kernel/entry_64.o CALL /home/kisskb/slave/src/arch/powerpc/kernel/systbl_chk.sh AS arch/powerpc/kernel/systbl.o CALL /home/kisskb/slave/src/arch/powerpc/kernel/prom_init_check.sh AR arch/powerpc/kernel/built-in.o make[1]: Leaving directory '/home/kisskb/slave/build/powerpc-next_cell_defconfig_powerpc' Makefile:145: recipe for target 'sub-make' failed make: *** [sub-make] Error 2 Command 'make -j 10 ARCH=powerpc O=/home/kisskb/slave/build/powerpc-next_cell_defconfig_powerpc CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux- ' returned non-zero exit status 2 # rm -rf /home/kisskb/slave/build/powerpc-next_cell_defconfig_powerpc # Build took: 0:00:15.700711
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