# git rev-parse -q --verify ea721ec55c8a4a166373978b9c8ce77374d684d6^{commit} ea721ec55c8a4a166373978b9c8ce77374d684d6 already have revision, skipping fetch # git checkout -q -f -B kisskb ea721ec55c8a4a166373978b9c8ce77374d684d6 # git clean -qxdf # < git log -1 # commit ea721ec55c8a4a166373978b9c8ce77374d684d6 # Author: Jordan Niethe # Date: Mon Feb 8 14:29:57 2021 +1100 # # selftests/powerpc: Test for spurious kernel memory faults on radix # # Previously when mapping kernel memory on radix, no ptesync was included # which would periodically lead to unhandled spurious faults. Mapping # kernel memory is used when code patching with Strict RWX enabled. As # suggested by Chris Riedl, turning ftrace on and off does a large amount # of code patching so is a convenient way to see this kind of fault. # # Add a selftest to try and trigger this kind of a spurious fault. It # tests for 30 seconds which is usually long enough for the issue to show # up. # # Signed-off-by: Jordan Niethe # Signed-off-by: Michael Ellerman # Link: https://lore.kernel.org/r/20210208032957.1232102-2-jniethe5@gmail.com # < /opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version # < /opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-ld --version # < git log --format=%s --max-count=1 ea721ec55c8a4a166373978b9c8ce77374d684d6 # < make -s -j 32 ARCH=powerpc O=/kisskb/build/powerpc-next_85xx_ppa8548_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux- 85xx/ppa8548_defconfig # < make -s -j 32 ARCH=powerpc O=/kisskb/build/powerpc-next_85xx_ppa8548_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux- help # make -s -j 32 ARCH=powerpc O=/kisskb/build/powerpc-next_85xx_ppa8548_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux- olddefconfig # make -s -j 32 ARCH=powerpc O=/kisskb/build/powerpc-next_85xx_ppa8548_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux- INFO: Uncompressed kernel (size 0x535820) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x600000) Image Name: Linux-5.11.0-rc2-gea721ec55c8a Created: Thu Feb 11 02:35:35 2021 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 2503345 Bytes = 2444.67 KiB = 2.39 MiB Load Address: 00000000 Entry Point: 00000000 Completed OK # rm -rf /kisskb/build/powerpc-next_85xx_ppa8548_defconfig_powerpc-gcc5 # Build took: 0:00:50.772297