# git rev-parse -q --verify 52e44129fba5cfc4e351fdb5e45849afc74d9a53^{commit}
52e44129fba5cfc4e351fdb5e45849afc74d9a53
already have revision, skipping fetch
# git checkout -q -f -B kisskb 52e44129fba5cfc4e351fdb5e45849afc74d9a53
# git clean -qxdf
# < git log -1
# commit 52e44129fba5cfc4e351fdb5e45849afc74d9a53
# Merge: efc2da9241e6 0760fa3d8f7f
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Sat Apr 10 12:51:12 2021 -0700
# 
#     Merge branch 'for-5.12-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/dennis/percpu
#     
#     Pull percpu fix from Dennis Zhou:
#      "This contains a fix for sporadically failing atomic percpu
#       allocations.
#     
#       I only caught it recently while I was reviewing a new series [1] and
#       simultaneously saw reports by btrfs in xfstests [2] and [3].
#     
#       In v5.9, memcg accounting was extended to percpu done by adding a
#       second type of chunk. I missed an interaction with the free page float
#       count used to ensure we can support atomic allocations. If one type of
#       chunk has no free pages, but the other has enough to satisfy the free
#       page float requirement, we will not repopulate the free pages for the
#       former type of chunk. This led to the sporadically failing atomic
#       allocations"
#     
#     Link: https://lore.kernel.org/linux-mm/20210324190626.564297-1-guro@fb.com/ [1]
#     Link: https://lore.kernel.org/linux-mm/20210401185158.3275.409509F4@e16-tech.com/ [2]
#     Link: https://lore.kernel.org/linux-mm/CAL3q7H5RNBjCi708GH7jnczAOe0BLnacT9C+OBgA-Dx9jhB6SQ@mail.gmail.com/ [3]
#     
#     * 'for-5.12-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/dennis/percpu:
#       percpu: make pcpu_nr_empty_pop_pages per chunk type
# < /opt/cross/kisskb/korg/gcc-4.9.4-nolibc/arm-linux-gnueabi/bin/arm-linux-gnueabi-gcc --version
# < /opt/cross/kisskb/korg/gcc-4.9.4-nolibc/arm-linux-gnueabi/bin/arm-linux-gnueabi-ld --version
# < git log --format=%s --max-count=1 52e44129fba5cfc4e351fdb5e45849afc74d9a53
# < make -s -j 48 ARCH=arm O=/kisskb/build/linus_lubbock_defconfig_arm-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/arm-linux-gnueabi/bin/arm-linux-gnueabi-  lubbock_defconfig
# < make -s -j 48 ARCH=arm O=/kisskb/build/linus_lubbock_defconfig_arm-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/arm-linux-gnueabi/bin/arm-linux-gnueabi-  help
# make -s -j 48 ARCH=arm O=/kisskb/build/linus_lubbock_defconfig_arm-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/arm-linux-gnueabi/bin/arm-linux-gnueabi-  olddefconfig
# make -s -j 48 ARCH=arm O=/kisskb/build/linus_lubbock_defconfig_arm-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/arm-linux-gnueabi/bin/arm-linux-gnueabi-  
Completed OK
# rm -rf /kisskb/build/linus_lubbock_defconfig_arm-gcc4.9
# Build took: 0:00:46.315576