# git rev-parse -q --verify 4a4be1ad3a6efea16c56615f31117590fd881358^{commit}
4a4be1ad3a6efea16c56615f31117590fd881358
already have revision, skipping fetch
# git checkout -q -f -B kisskb 4a4be1ad3a6efea16c56615f31117590fd881358
# git clean -qxdf
# < git log -1
# commit 4a4be1ad3a6efea16c56615f31117590fd881358
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Wed May 29 09:39:34 2024 -0700
# 
#     Revert "vfs: Delete the associated dentry when deleting a file"
#     
#     This reverts commit 681ce8623567ba7e7333908e9826b77145312dda.
#     
#     We gave it a try, but it turns out the kernel test robot did in fact
#     find performance regressions for it, so we'll have to look at the more
#     involved alternative fixes for Yafang Shao's Elasticsearch load issue.
#     
#     There were several alternatives discussed, they just weren't as simple
#     as this first attempt.
#     
#     The report is of a -7.4% regression of filebench.sum_operations/s, which
#     appears significant enough to trigger my "this patch may get reverted if
#     somebody finds a performance regression on some other load" rule.
#     
#     So it's still the case that we should end up deleting dentries more
#     aggressively - or just be better at pruning them later - but it needs a
#     bit more finesse than this simple thing.
#     
#     Link: https://lore.kernel.org/all/202405291318.4dfbb352-oliver.sang@intel.com/
#     Cc: Yafang Shao <laoar.shao@gmail.com>
#     Cc: Al Viro <viro@zeniv.linux.org.uk>
#     Cc: Christian Brauner <brauner@kernel.org>
#     Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
# < /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 4a4be1ad3a6efea16c56615f31117590fd881358
# make -s -j 40 ARCH=powerpc O=/kisskb/build/linus_skiroot_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  skiroot_defconfig
# < make -s -j 40 ARCH=powerpc O=/kisskb/build/linus_skiroot_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  help
# make -s -j 40 ARCH=powerpc O=/kisskb/build/linus_skiroot_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  olddefconfig
# make -s -j 40 ARCH=powerpc O=/kisskb/build/linus_skiroot_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  
/kisskb/src/fs/btrfs/extent_io.c: In function 'extent_fiemap':
/kisskb/src/fs/btrfs/extent_io.c:3285:19: warning: 'last_extent_end' may be used uninitialized in this function [-Wmaybe-uninitialized]
  if (cache.cached && cache.offset + cache.len >= last_extent_end) {
                   ^
/kisskb/src/fs/btrfs/extent_io.c: At top level:
cc1: warning: unrecognized command line option '-Wno-shift-negative-value'
cc1: warning: unrecognized command line option '-Wno-shift-negative-value'
cc1: warning: unrecognized command line option '-Wno-stringop-overflow'
Completed OK
# rm -rf /kisskb/build/linus_skiroot_defconfig_powerpc-gcc5
# Build took: 0:01:01.637276