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  1. 14 May, 2022 2 commits
    • Al Viro's avatar
      Unify the primitives for file descriptor closing · 6319194e
      Al Viro authored 
      Currently we have 3 primitives for removing an opened file from descriptor
table - pick_file(), __close_fd_get_file() and close_fd_get_file().  Their
calling conventions are rather odd and there's a code duplication for no
good reason.  They can be unified -

1) have __range_close() cap max_fd in the very beginning; that way
we don't need separate way for pick_file() to report being past the end
of descriptor table.

2) make {__,}close_fd_get_file() return file (or NULL) directly, rather
than returning it via struct file ** argument.  Don't bother with
(bogus) return value - nobody wants that -ENOENT.

3) make pick_file() return NULL on unopened descriptor - the only caller
that used to care about the distinction between descriptor past the end
of descriptor table and finding NULL in descriptor table doesn't give
a damn after (1).

4) lift ->files_lock out of pick_file()

That actually simplifies the callers, as well as the primitives themselves.
Code duplication is also gone...
Reviewed-by: default avatarChristian Brauner (Microsoft) <brauner@kernel.org>
Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
      6319194e
    • Gou Hao's avatar
      fs: remove fget_many and fput_many interface · 81132a39
      Gou Hao authored 
      These two interface were added in 091141a4 commit,
but now there is no place to call them.

The only user of fput/fget_many() was removed in commit
62906e89 ("io_uring: remove file batch-get optimisation").

A user of get_file_rcu_many() were removed in commit
f0735310 ("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: default avatarGou Hao <gouhao@uniontech.com>
Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
      81132a39
  3. 12 May, 2022 1 commit
  5. 03 Apr, 2022 8 commits
  7. 02 Apr, 2022 29 commits
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