# git rev-parse -q --verify ae14c63a9f20d49dacfb6f3fa3fb11b3b4eb11bf^{commit}
ae14c63a9f20d49dacfb6f3fa3fb11b3b4eb11bf
already have revision, skipping fetch
# git checkout -q -f -B kisskb ae14c63a9f20d49dacfb6f3fa3fb11b3b4eb11bf
# git clean -qxdf
# < git log -1
# commit ae14c63a9f20d49dacfb6f3fa3fb11b3b4eb11bf
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Sat Jul 17 13:27:00 2021 -0700
# 
#     Revert "mm/slub: use stackdepot to save stack trace in objects"
#     
#     This reverts commit 788691464c29455346dc613a3b43c2fb9e5757a4.
#     
#     It's not clear why, but it causes unexplained problems in entirely
#     unrelated xfs code.  The most likely explanation is some slab
#     corruption, possibly triggered due to CONFIG_SLUB_DEBUG_ON.  See [1].
#     
#     It ends up having a few other problems too, like build errors on
#     arch/arc, and Geert reporting it using much more memory on m68k [3] (it
#     probably does so elsewhere too, but it is probably just more noticeable
#     on m68k).
#     
#     The architecture issues (both build and memory use) are likely just
#     because this change effectively force-enabled STACKDEPOT (along with a
#     very bad default value for the stackdepot hash size).  But together with
#     the xfs issue, this all smells like "this commit was not ready" to me.
#     
#     Link: https://lore.kernel.org/linux-xfs/YPE3l82acwgI2OiV@infradead.org/ [1]
#     Link: https://lore.kernel.org/lkml/202107150600.LkGNb4Vb-lkp@intel.com/ [2]
#     Link: https://lore.kernel.org/lkml/CAMuHMdW=eoVzM1Re5FVoEN87nKfiLmM2+Ah7eNu2KXEhCvbZyA@mail.gmail.com/ [3]
#     Reported-by: Christoph Hellwig <hch@infradead.org>
#     Reported-by: kernel test robot <lkp@intel.com>
#     Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
#     Cc: Andrew Morton <akpm@linux-foundation.org>
#     Cc: Vlastimil Babka <vbabka@suse.cz>
#     Cc: Randy Dunlap <rdunlap@infradead.org>
#     Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
# < /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 ae14c63a9f20d49dacfb6f3fa3fb11b3b4eb11bf
# < make -s -j 120 ARCH=powerpc O=/kisskb/build/linus-rand_powerpc-randconfig_powerpc-gcc9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-9.2.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  randconfig
# Added to kconfig CONFIG_STANDALONE=y
# Added to kconfig CONFIG_BUILD_DOCSRC=n
# Added to kconfig CONFIG_MODULE_SIG=n
# Added to kconfig CONFIG_CPU_BIG_ENDIAN=y
# Added to kconfig CONFIG_PPC64=y
# Added to kconfig CONFIG_PPC_DISABLE_WERROR=y
# Added to kconfig CONFIG_SECTION_MISMATCH_WARN_ONLY=y
# Added to kconfig CONFIG_PREVENT_FIRMWARE_BUILD=y
# Added to kconfig CONFIG_CC_STACKPROTECTOR_STRONG=n
# Added to kconfig CONFIG_GCC_PLUGINS=n
# Added to kconfig CONFIG_LD_HEAD_STUB_CATCH=y
# Added to kconfig CONFIG_TRIM_UNUSED_KSYMS=n
# Added to kconfig CONFIG_UBSAN=n
# < make -s -j 120 ARCH=powerpc O=/kisskb/build/linus-rand_powerpc-randconfig_powerpc-gcc9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-9.2.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  help
# make -s -j 120 ARCH=powerpc O=/kisskb/build/linus-rand_powerpc-randconfig_powerpc-gcc9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-9.2.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  olddefconfig
.config:4689:warning: override: reassigning to symbol PPC_DISABLE_WERROR
.config:4691:warning: override: reassigning to symbol PREVENT_FIRMWARE_BUILD
.config:4693:warning: override: reassigning to symbol GCC_PLUGINS
# make -s -j 120 ARCH=powerpc O=/kisskb/build/linus-rand_powerpc-randconfig_powerpc-gcc9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-9.2.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  
Completed OK
# rm -rf /kisskb/build/linus-rand_powerpc-randconfig_powerpc-gcc9
# Build took: 0:01:50.956073