# git rev-parse -q --verify 0bcfe68b876748762557797a940d0a82de700629^{commit} 0bcfe68b876748762557797a940d0a82de700629 already have revision, skipping fetch # git checkout -q -f -B kisskb 0bcfe68b876748762557797a940d0a82de700629 # git clean -qxdf # < git log -1 # commit 0bcfe68b876748762557797a940d0a82de700629 # Author: Linus Torvalds # Date: Tue Sep 7 11:26:23 2021 -0700 # # Revert "memcg: enable accounting for pollfd and select bits arrays" # # This reverts commit b655843444152c0a14b749308e4cb35d91cbcf0b. # # Just like with the memcg lock accounting, the kernel test robot reports # a sizeable performance regression for this commit, and while it clearly # does the rigth thing in theory, we'll need to look at just how to avoid # or minimize the performance overhead of the memcg accounting. # # People already have suggestions on how to do that, but it's "future # work". # # So revert it for now. # # [ Note: the first link below is for this same commit but a different # commit ID, because it's the kernel test robot ended up noticing it in # Andrew Morton's patch queue ] # # Link: https://lore.kernel.org/lkml/20210905132732.GC15026@xsang-OptiPlex-9020/ # Link: https://lore.kernel.org/lkml/20210907150757.GE17617@xsang-OptiPlex-9020/ # Acked-by: Jens Axboe # Acked-by: Shakeel Butt # Acked-by: Roman Gushchin # Cc: Tejun Heo # Signed-off-by: Linus Torvalds # < /opt/cross/kisskb/korg/gcc-8.1.0-nolibc/s390-linux/bin/s390-linux-gcc --version # < /opt/cross/kisskb/korg/gcc-8.1.0-nolibc/s390-linux/bin/s390-linux-ld --version # < git log --format=%s --max-count=1 0bcfe68b876748762557797a940d0a82de700629 # < make -s -j 32 ARCH=s390 O=/kisskb/build/linus_s390-allyesconfig_s390x-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/s390-linux/bin/s390-linux- allyesconfig # Added to kconfig CONFIG_BUILD_DOCSRC=n # Added to kconfig CONFIG_MODULE_SIG=n # Added to kconfig CONFIG_KCOV=n # Added to kconfig # < make -s -j 32 ARCH=s390 O=/kisskb/build/linus_s390-allyesconfig_s390x-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/s390-linux/bin/s390-linux- help # make -s -j 32 ARCH=s390 O=/kisskb/build/linus_s390-allyesconfig_s390x-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/s390-linux/bin/s390-linux- olddefconfig # make -s -j 32 ARCH=s390 O=/kisskb/build/linus_s390-allyesconfig_s390x-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/s390-linux/bin/s390-linux- /kisskb/src/arch/s390/kernel/syscall.c: In function '__do_syscall': /kisskb/src/arch/s390/kernel/syscall.c:168:1: error: '__do_syscall' uses dynamic stack allocation [-Werror] } ^ cc1: all warnings being treated as errors make[3]: *** [/kisskb/src/scripts/Makefile.build:277: arch/s390/kernel/syscall.o] Error 1 make[3]: *** Waiting for unfinished jobs.... make[2]: *** [/kisskb/src/scripts/Makefile.build:540: arch/s390/kernel] Error 2 make[2]: *** Waiting for unfinished jobs.... make[1]: *** [/kisskb/src/Makefile:1872: arch/s390] Error 2 make[1]: *** Waiting for unfinished jobs.... /kisskb/src/kernel/trace/trace_osnoise.c: In function 'start_kthread': /kisskb/src/kernel/trace/trace_osnoise.c:1515:8: error: 'main' is usually a function [-Werror=main] void *main = osnoise_main; ^~~~ cc1: all warnings being treated as errors make[3]: *** [/kisskb/src/scripts/Makefile.build:277: kernel/trace/trace_osnoise.o] Error 1 make[3]: *** Waiting for unfinished jobs.... make[2]: *** [/kisskb/src/scripts/Makefile.build:540: kernel/trace] Error 2 make[2]: *** Waiting for unfinished jobs.... make[1]: *** [/kisskb/src/Makefile:1872: kernel] Error 2 /kisskb/src/drivers/gpu/drm/rockchip/cdn-dp-core.c:1126:12: error: 'cdn_dp_resume' defined but not used [-Werror=unused-function] static int cdn_dp_resume(struct device *dev) ^~~~~~~~~~~~~ cc1: all warnings being treated as errors make[5]: *** [/kisskb/src/scripts/Makefile.build:277: drivers/gpu/drm/rockchip/cdn-dp-core.o] Error 1 make[5]: *** Waiting for unfinished jobs.... make[4]: *** [/kisskb/src/scripts/Makefile.build:540: drivers/gpu/drm/rockchip] Error 2 make[4]: *** Waiting for unfinished jobs.... /kisskb/src/drivers/spi/spi-tegra20-slink.c:1200:12: error: 'tegra_slink_runtime_resume' defined but not used [-Werror=unused-function] static int tegra_slink_runtime_resume(struct device *dev) ^~~~~~~~~~~~~~~~~~~~~~~~~~ /kisskb/src/drivers/spi/spi-tegra20-slink.c:1188:12: error: 'tegra_slink_runtime_suspend' defined but not used [-Werror=unused-function] static int tegra_slink_runtime_suspend(struct device *dev) ^~~~~~~~~~~~~~~~~~~~~~~~~~~ cc1: all warnings being treated as errors make[3]: *** [/kisskb/src/scripts/Makefile.build:277: drivers/spi/spi-tegra20-slink.o] Error 1 make[3]: *** Waiting for unfinished jobs.... make[2]: *** [/kisskb/src/scripts/Makefile.build:540: drivers/spi] Error 2 make[2]: *** Waiting for unfinished jobs.... make[3]: *** [/kisskb/src/scripts/Makefile.build:540: drivers/gpu/drm] Error 2 make[2]: *** [/kisskb/src/scripts/Makefile.build:540: drivers/gpu] Error 2 make[1]: *** [/kisskb/src/Makefile:1872: drivers] Error 2 make: *** [Makefile:219: __sub-make] Error 2 Command 'make -s -j 32 ARCH=s390 O=/kisskb/build/linus_s390-allyesconfig_s390x-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/s390-linux/bin/s390-linux- ' returned non-zero exit status 2 # rm -rf /kisskb/build/linus_s390-allyesconfig_s390x-gcc8 # Build took: 0:06:37.941485