# 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/sparc64-linux/bin/sparc64-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-5.5.0-nolibc/sparc64-linux/bin/sparc64-linux-ld --version
# < git log --format=%s --max-count=1 4a4be1ad3a6efea16c56615f31117590fd881358
# make -s -j 40 ARCH=sparc64 O=/kisskb/build/linus_allnoconfig_sparc64-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/sparc64-linux/bin/sparc64-linux-  allnoconfig
# < make -s -j 40 ARCH=sparc64 O=/kisskb/build/linus_allnoconfig_sparc64-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/sparc64-linux/bin/sparc64-linux-  help
# make -s -j 40 ARCH=sparc64 O=/kisskb/build/linus_allnoconfig_sparc64-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/sparc64-linux/bin/sparc64-linux-  olddefconfig
# make -s -j 40 ARCH=sparc64 O=/kisskb/build/linus_allnoconfig_sparc64-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/sparc64-linux/bin/sparc64-linux-  
<stdin>:1519:2: warning: #warning syscall clone3 not implemented [-Wcpp]
cc1: warning: unrecognized command line option '-Wno-shift-negative-value'
cc1: warning: unrecognized command line option '-Wno-stringop-overflow'
/kisskb/src/arch/sparc/vdso/vclock_gettime.c:254:1: warning: no previous prototype for '__vdso_clock_gettime' [-Wmissing-prototypes]
 __vdso_clock_gettime(clockid_t clock, struct __kernel_old_timespec *ts)
 ^
/kisskb/src/arch/sparc/vdso/vclock_gettime.c:282:1: warning: no previous prototype for '__vdso_clock_gettime_stick' [-Wmissing-prototypes]
 __vdso_clock_gettime_stick(clockid_t clock, struct __kernel_old_timespec *ts)
 ^
/kisskb/src/arch/sparc/vdso/vclock_gettime.c:307:1: warning: no previous prototype for '__vdso_gettimeofday' [-Wmissing-prototypes]
 __vdso_gettimeofday(struct __kernel_old_timeval *tv, struct timezone *tz)
 ^
/kisskb/src/arch/sparc/vdso/vclock_gettime.c:343:1: warning: no previous prototype for '__vdso_gettimeofday_stick' [-Wmissing-prototypes]
 __vdso_gettimeofday_stick(struct __kernel_old_timeval *tv, struct timezone *tz)
 ^
cc1: warning: unrecognized command line option '-Wno-shift-negative-value'
cc1: warning: unrecognized command line option '-Wno-stringop-overflow'
/kisskb/src/arch/sparc/prom/misc_64.c:165:5: warning: no previous prototype for 'prom_get_mmu_ihandle' [-Wmissing-prototypes]
 int prom_get_mmu_ihandle(void)
     ^
cc1: warning: unrecognized command line option '-Wno-shift-negative-value'
cc1: warning: unrecognized command line option '-Wno-stringop-overflow'
In file included from /kisskb/src/arch/sparc/vdso/vdso32/vclock_gettime.c:22:0:
/kisskb/src/arch/sparc/vdso/vdso32/../vclock_gettime.c:254:1: warning: no previous prototype for '__vdso_clock_gettime' [-Wmissing-prototypes]
 __vdso_clock_gettime(clockid_t clock, struct __kernel_old_timespec *ts)
 ^
/kisskb/src/arch/sparc/vdso/vdso32/../vclock_gettime.c:282:1: warning: no previous prototype for '__vdso_clock_gettime_stick' [-Wmissing-prototypes]
 __vdso_clock_gettime_stick(clockid_t clock, struct __kernel_old_timespec *ts)
 ^
/kisskb/src/arch/sparc/vdso/vdso32/../vclock_gettime.c:307:1: warning: no previous prototype for '__vdso_gettimeofday' [-Wmissing-prototypes]
 __vdso_gettimeofday(struct __kernel_old_timeval *tv, struct timezone *tz)
 ^
/kisskb/src/arch/sparc/vdso/vdso32/../vclock_gettime.c:343:1: warning: no previous prototype for '__vdso_gettimeofday_stick' [-Wmissing-prototypes]
 __vdso_gettimeofday_stick(struct __kernel_old_timeval *tv, struct timezone *tz)
 ^
cc1: warning: unrecognized command line option '-Wno-shift-negative-value'
cc1: warning: unrecognized command line option '-Wno-stringop-overflow'
/kisskb/src/arch/sparc/prom/p1275.c:52:6: warning: no previous prototype for 'prom_cif_init' [-Wmissing-prototypes]
 void prom_cif_init(void *cif_handler, void *cif_stack)
      ^
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_allnoconfig_sparc64-gcc5
# Build took: 0:00:14.869718