Buildresult: powerpc-fixes/powernv_defconfig+STRICT_RWX/powerpc-gcc9 built on Nov 27 2020, 01:25

kisskb

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Status:	OK
Date/Time:	Nov 27 2020, 01:25
Duration:	0:03:49.247156
Builder:	ka3
Revision:	powerpc/64s: Trim offlined CPUs from mm_cpumasks (`01b0f0eae0812e80efeee4ee17687e5386335e08)`
Target:	powerpc-fixes/powernv_defconfig+STRICT_RWX/powerpc-gcc9
Branch:	powerpc-fixes
Compiler:	powerpc-gcc9 (powerpc64-linux-gcc (GCC) 9.2.0 / GNU ld (GNU Binutils) 2.32)
Config:	powernv_defconfig+STRICT_RWX (download)
Log:	Download original Possible warnings (1) .config:4012:warning: override: reassigning to symbol RELOCATABLE Full Log # git rev-parse -q --verify 01b0f0eae0812e80efeee4ee17687e5386335e08^{commit} 01b0f0eae0812e80efeee4ee17687e5386335e08 already have revision, skipping fetch # git checkout -q -f -B kisskb 01b0f0eae0812e80efeee4ee17687e5386335e08 # git clean -qxdf # < git log -1 # commit 01b0f0eae0812e80efeee4ee17687e5386335e08 # Author: Nicholas Piggin <npiggin@gmail.com> # Date: Thu Nov 26 20:25:30 2020 +1000 # # powerpc/64s: Trim offlined CPUs from mm_cpumasks # # When offlining a CPU, powerpc/64s does not flush TLBs, rather it just # leaves the CPU set in mm_cpumasks, so it continues to receive TLBIEs # to manage its TLBs. # # However the exit_flush_lazy_tlbs() function expects that after # returning, all CPUs (except self) have flushed TLBs for that mm, in # which case TLBIEL can be used for this flush. This breaks for offline # CPUs because they don't get the IPI to flush their TLB. This can lead # to stale translations. # # Fix this by clearing the CPU from mm_cpumasks, then flushing all TLBs # before going offline. # # These offlined CPU bits stuck in the cpumask also prevents the cpumask # from being trimmed back to local mode, which means continual broadcast # IPIs or TLBIEs are needed for TLB flushing. This patch prevents that # situation too. # # A cast of many were involved in working this out, but in particular # Milton, Aneesh, Paul made key discoveries. # # Fixes: 0cef77c7798a7 ("powerpc/64s/radix: flush remote CPUs out of single-threaded mm_cpumask") # Signed-off-by: Nicholas Piggin <npiggin@gmail.com> # Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> # Debugged-by: Milton Miller <miltonm@us.ibm.com> # Debugged-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> # Debugged-by: Paul Mackerras <paulus@samba.org> # Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> # Link: https://lore.kernel.org/r/20201126102530.691335-5-npiggin@gmail.com # < /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 01b0f0eae0812e80efeee4ee17687e5386335e08 # < make -s -j 80 ARCH=powerpc O=/kisskb/build/powerpc-fixes_powernv_defconfig+STRICT_RWX_powerpc-gcc9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-9.2.0-nolibc/powerpc64-linux/bin/powerpc64-linux- powernv_defconfig # Added to kconfig CONFIG_RELOCATABLE=n # Added to kconfig CONFIG_STRICT_KERNEL_RWX=y # < make -s -j 80 ARCH=powerpc O=/kisskb/build/powerpc-fixes_powernv_defconfig+STRICT_RWX_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-fixes_powernv_defconfig+STRICT_RWX_powerpc-gcc9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-9.2.0-nolibc/powerpc64-linux/bin/powerpc64-linux- olddefconfig .config:4012:warning: override: reassigning to symbol RELOCATABLE # make -s -j 80 ARCH=powerpc O=/kisskb/build/powerpc-fixes_powernv_defconfig+STRICT_RWX_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-fixes_powernv_defconfig+STRICT_RWX_powerpc-gcc9 # Build took: 0:03:49.247156

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