# git rev-parse -q --verify 0ba09b1733878afe838fe35c310715fda3d46428^{commit} 0ba09b1733878afe838fe35c310715fda3d46428 already have revision, skipping fetch # git checkout -q -f -B kisskb 0ba09b1733878afe838fe35c310715fda3d46428 # git clean -qxdf # < git log -1 # commit 0ba09b1733878afe838fe35c310715fda3d46428 # Author: Linus Torvalds # Date: Sun Dec 4 12:51:59 2022 -0800 # # Revert "mm: align larger anonymous mappings on THP boundaries" # # This reverts commit f35b5d7d676e59e401690b678cd3cfec5e785c23. # # It has been reported to cause huge performance regressions on some loads # (will-it-scale.per_process_ops, but also building the kernel with # clang). # # The commit did speed up gcc builds by a small amount, so it's not an # unambiguous regression, but until the big regressions are understood, # let's revert it. # # Reported-by: kernel test robot # Link: https://lore.kernel.org/r/202210181535.7144dd15-yujie.liu@intel.com # Reported-by: Nathan Chancellor # Link: https://lore.kernel.org/lkml/Y1DNQaoPWxE%2BrGce@dev-arch.thelio-3990X/ # Cc: Huang, Ying # Cc: Rik van Riel # Cc: Andrew Morton # Cc: Yang Shi # Signed-off-by: Linus Torvalds # < /opt/cross/kisskb/korg/gcc-12.2.0-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version # < /opt/cross/kisskb/korg/gcc-12.2.0-nolibc/powerpc64-linux/bin/powerpc64-linux-ld --version # < git log --format=%s --max-count=1 0ba09b1733878afe838fe35c310715fda3d46428 # < make -s -j 160 ARCH=powerpc O=/kisskb/build/linus_corenet32_smp_defconfig_powerpc-gcc12 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-12.2.0-nolibc/powerpc64-linux/bin/powerpc64-linux- corenet32_smp_defconfig # < make -s -j 160 ARCH=powerpc O=/kisskb/build/linus_corenet32_smp_defconfig_powerpc-gcc12 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-12.2.0-nolibc/powerpc64-linux/bin/powerpc64-linux- help # make -s -j 160 ARCH=powerpc O=/kisskb/build/linus_corenet32_smp_defconfig_powerpc-gcc12 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-12.2.0-nolibc/powerpc64-linux/bin/powerpc64-linux- olddefconfig # make -s -j 160 ARCH=powerpc O=/kisskb/build/linus_corenet32_smp_defconfig_powerpc-gcc12 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-12.2.0-nolibc/powerpc64-linux/bin/powerpc64-linux- Completed OK # rm -rf /kisskb/build/linus_corenet32_smp_defconfig_powerpc-gcc12 # Build took: 0:03:05.584312