diff options
| author | Gou Hao <gouhao@uniontech.com> | 2021-11-02 03:46:48 +0100 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2022-05-15 00:47:28 +0200 |
| commit | 81132a39c152ca09832b9e4cb748129cee5f55ec (patch) | |
| tree | c680492afc83599e9f91bc028f7ddd2736418d15 /include | |
| parent | io_uring_enter(): don't leave f.flags uninitialized (diff) | |
| download | linux-81132a39c152ca09832b9e4cb748129cee5f55ec.tar.xz linux-81132a39c152ca09832b9e4cb748129cee5f55ec.zip | |
fs: remove fget_many and fput_many interface
These two interface were added in 091141a42 commit,
but now there is no place to call them.
The only user of fput/fget_many() was removed in commit
62906e89e63b ("io_uring: remove file batch-get optimisation").
A user of get_file_rcu_many() were removed in commit
f073531070d2 ("init: add an init_dup helper").
And replace atomic_long_sub/add to atomic_long_dec/inc
can improve performance.
Here are the test results of unixbench:
Cmd: ./Run -c 64 context1
Without patch:
System Benchmarks Partial Index BASELINE RESULT INDEX
Pipe-based Context Switching 4000.0 2798407.0 6996.0
========
System Benchmarks Index Score (Partial Only) 6996.0
With patch:
System Benchmarks Partial Index BASELINE RESULT INDEX
Pipe-based Context Switching 4000.0 3486268.8 8715.7
========
System Benchmarks Index Score (Partial Only) 8715.7
Signed-off-by: Gou Hao <gouhao@uniontech.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/file.h | 2 | ||||
| -rw-r--r-- | include/linux/fs.h | 4 |
2 files changed, 1 insertions, 5 deletions
diff --git a/include/linux/file.h b/include/linux/file.h index 51e830b4fe3a..39704eae83e2 100644 --- a/include/linux/file.h +++ b/include/linux/file.h @@ -14,7 +14,6 @@ struct file; extern void fput(struct file *); -extern void fput_many(struct file *, unsigned int); struct file_operations; struct task_struct; @@ -47,7 +46,6 @@ static inline void fdput(struct fd fd) } extern struct file *fget(unsigned int fd); -extern struct file *fget_many(unsigned int fd, unsigned int refs); extern struct file *fget_raw(unsigned int fd); extern struct file *fget_task(struct task_struct *task, unsigned int fd); extern unsigned long __fdget(unsigned int fd); diff --git a/include/linux/fs.h b/include/linux/fs.h index bbde95387a23..3660c338bb16 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -981,9 +981,7 @@ static inline struct file *get_file(struct file *f) atomic_long_inc(&f->f_count); return f; } -#define get_file_rcu_many(x, cnt) \ - atomic_long_add_unless(&(x)->f_count, (cnt), 0) -#define get_file_rcu(x) get_file_rcu_many((x), 1) +#define get_file_rcu(x) atomic_long_inc_not_zero(&(x)->f_count) #define file_count(x) atomic_long_read(&(x)->f_count) #define MAX_NON_LFS ((1UL<<31) - 1) |