# 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-13.1.0-nolibc/sh4-linux/bin/sh4-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-13.1.0-nolibc/sh4-linux/bin/sh4-linux-ld --version
# < git log --format=%s --max-count=1 4a4be1ad3a6efea16c56615f31117590fd881358
# make -s -j 32 ARCH=sh O=/kisskb/build/linus_defconfig_sh4-gcc13 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-13.1.0-nolibc/sh4-linux/bin/sh4-linux-  defconfig
# < make -s -j 32 ARCH=sh O=/kisskb/build/linus_defconfig_sh4-gcc13 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-13.1.0-nolibc/sh4-linux/bin/sh4-linux-  help
# make -s -j 32 ARCH=sh O=/kisskb/build/linus_defconfig_sh4-gcc13 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-13.1.0-nolibc/sh4-linux/bin/sh4-linux-  olddefconfig
# make -s -j 32 ARCH=sh O=/kisskb/build/linus_defconfig_sh4-gcc13 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-13.1.0-nolibc/sh4-linux/bin/sh4-linux-  
  Generating include/generated/machtypes.h
<stdin>:1519:2: warning: #warning syscall clone3 not implemented [-Wcpp]
/kisskb/src/kernel/locking/spinlock.c:68:17: warning: no previous prototype for '__raw_spin_lock' [-Wmissing-prototypes]
   68 | void __lockfunc __raw_##op##_lock(locktype##_t *lock)                   \
      |                 ^~~~~~
/kisskb/src/kernel/locking/spinlock.c:126:1: note: in expansion of macro 'BUILD_LOCK_OPS'
  126 | BUILD_LOCK_OPS(spin, raw_spinlock);
      | ^~~~~~~~~~~~~~
/kisskb/src/kernel/locking/spinlock.c:80:26: warning: no previous prototype for '__raw_spin_lock_irqsave' [-Wmissing-prototypes]
   80 | unsigned long __lockfunc __raw_##op##_lock_irqsave(locktype##_t *lock)  \
      |                          ^~~~~~
/kisskb/src/kernel/locking/spinlock.c:126:1: note: in expansion of macro 'BUILD_LOCK_OPS'
  126 | BUILD_LOCK_OPS(spin, raw_spinlock);
      | ^~~~~~~~~~~~~~
/kisskb/src/kernel/locking/spinlock.c:98:17: warning: no previous prototype for '__raw_spin_lock_irq' [-Wmissing-prototypes]
   98 | void __lockfunc __raw_##op##_lock_irq(locktype##_t *lock)               \
      |                 ^~~~~~
/kisskb/src/kernel/locking/spinlock.c:126:1: note: in expansion of macro 'BUILD_LOCK_OPS'
  126 | BUILD_LOCK_OPS(spin, raw_spinlock);
      | ^~~~~~~~~~~~~~
/kisskb/src/kernel/locking/spinlock.c:103:17: warning: no previous prototype for '__raw_spin_lock_bh' [-Wmissing-prototypes]
  103 | void __lockfunc __raw_##op##_lock_bh(locktype##_t *lock)                \
      |                 ^~~~~~
/kisskb/src/kernel/locking/spinlock.c:126:1: note: in expansion of macro 'BUILD_LOCK_OPS'
  126 | BUILD_LOCK_OPS(spin, raw_spinlock);
      | ^~~~~~~~~~~~~~
/kisskb/src/kernel/locking/spinlock.c:68:17: warning: no previous prototype for '__raw_read_lock' [-Wmissing-prototypes]
   68 | void __lockfunc __raw_##op##_lock(locktype##_t *lock)                   \
      |                 ^~~~~~
/kisskb/src/kernel/locking/spinlock.c:129:1: note: in expansion of macro 'BUILD_LOCK_OPS'
  129 | BUILD_LOCK_OPS(read, rwlock);
      | ^~~~~~~~~~~~~~
/kisskb/src/kernel/locking/spinlock.c:80:26: warning: no previous prototype for '__raw_read_lock_irqsave' [-Wmissing-prototypes]
   80 | unsigned long __lockfunc __raw_##op##_lock_irqsave(locktype##_t *lock)  \
      |                          ^~~~~~
/kisskb/src/kernel/locking/spinlock.c:129:1: note: in expansion of macro 'BUILD_LOCK_OPS'
  129 | BUILD_LOCK_OPS(read, rwlock);
      | ^~~~~~~~~~~~~~
/kisskb/src/kernel/locking/spinlock.c:98:17: warning: no previous prototype for '__raw_read_lock_irq' [-Wmissing-prototypes]
   98 | void __lockfunc __raw_##op##_lock_irq(locktype##_t *lock)               \
      |                 ^~~~~~
/kisskb/src/kernel/locking/spinlock.c:129:1: note: in expansion of macro 'BUILD_LOCK_OPS'
  129 | BUILD_LOCK_OPS(read, rwlock);
      | ^~~~~~~~~~~~~~
/kisskb/src/kernel/locking/spinlock.c:103:17: warning: no previous prototype for '__raw_read_lock_bh' [-Wmissing-prototypes]
  103 | void __lockfunc __raw_##op##_lock_bh(locktype##_t *lock)                \
      |                 ^~~~~~
/kisskb/src/kernel/locking/spinlock.c:129:1: note: in expansion of macro 'BUILD_LOCK_OPS'
  129 | BUILD_LOCK_OPS(read, rwlock);
      | ^~~~~~~~~~~~~~
/kisskb/src/kernel/locking/spinlock.c:68:17: warning: no previous prototype for '__raw_write_lock' [-Wmissing-prototypes]
   68 | void __lockfunc __raw_##op##_lock(locktype##_t *lock)                   \
      |                 ^~~~~~
/kisskb/src/kernel/locking/spinlock.c:130:1: note: in expansion of macro 'BUILD_LOCK_OPS'
  130 | BUILD_LOCK_OPS(write, rwlock);
      | ^~~~~~~~~~~~~~
/kisskb/src/kernel/locking/spinlock.c:80:26: warning: no previous prototype for '__raw_write_lock_irqsave' [-Wmissing-prototypes]
   80 | unsigned long __lockfunc __raw_##op##_lock_irqsave(locktype##_t *lock)  \
      |                          ^~~~~~
/kisskb/src/kernel/locking/spinlock.c:130:1: note: in expansion of macro 'BUILD_LOCK_OPS'
  130 | BUILD_LOCK_OPS(write, rwlock);
      | ^~~~~~~~~~~~~~
/kisskb/src/kernel/locking/spinlock.c:98:17: warning: no previous prototype for '__raw_write_lock_irq' [-Wmissing-prototypes]
   98 | void __lockfunc __raw_##op##_lock_irq(locktype##_t *lock)               \
      |                 ^~~~~~
/kisskb/src/kernel/locking/spinlock.c:130:1: note: in expansion of macro 'BUILD_LOCK_OPS'
  130 | BUILD_LOCK_OPS(write, rwlock);
      | ^~~~~~~~~~~~~~
/kisskb/src/kernel/locking/spinlock.c:103:17: warning: no previous prototype for '__raw_write_lock_bh' [-Wmissing-prototypes]
  103 | void __lockfunc __raw_##op##_lock_bh(locktype##_t *lock)                \
      |                 ^~~~~~
/kisskb/src/kernel/locking/spinlock.c:130:1: note: in expansion of macro 'BUILD_LOCK_OPS'
  130 | BUILD_LOCK_OPS(write, rwlock);
      | ^~~~~~~~~~~~~~
/kisskb/src/fs/ext4/readpage.c: In function 'ext4_mpage_readpages':
/kisskb/src/fs/ext4/readpage.c:391:1: warning: the frame size of 1120 bytes is larger than 1024 bytes [-Wframe-larger-than=]
  391 | }
      | ^
  Kernel: arch/sh/boot/zImage is ready
Completed OK
# rm -rf /kisskb/build/linus_defconfig_sh4-gcc13
# Build took: 0:00:56.151829