diff options
| author | Alexey Dobriyan <adobriyan@gmail.com> | 2018-04-10 16:32:20 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-04-11 10:28:34 -0700 |
| commit | 4f1134370a29a5f2d0f4b4be4c5e2fddd38f0f9d (patch) | |
| tree | 0fcae1f568cf1c2870f615e214f3e92a77afcd30 /fs/proc/internal.h | |
| parent | 05c3f29283af9e3da0ab7414f666cb37f530950a (diff) | |
proc: use slower rb_first()
In a typical for /proc "open+read+close" usecase, dentry is looked up
successfully on open only to be killed in dput() on close. In fact
dentries which aren't /proc/*/... and /proc/sys/* were almost NEVER
CACHED. Simple printk in proc_lookup_de() shows that.
Now that ->delete hook intelligently picks which dentries should live in
dcache and which should not, rbtree caching is not necessary as dcache
does it job, at last!
As a side effect, struct proc_dir_entry shrinks by one pointer which can
go into inline name.
Link: http://lkml.kernel.org/r/20180314231032.GA15854@avx2
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Acked-by: Davidlohr Bueso <dbueso@suse.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/proc/internal.h')
| -rw-r--r-- | fs/proc/internal.h | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/fs/proc/internal.h b/fs/proc/internal.h index b7024f174778..0f1692e63cb6 100644 --- a/fs/proc/internal.h +++ b/fs/proc/internal.h @@ -51,15 +51,15 @@ struct proc_dir_entry { kgid_t gid; loff_t size; struct proc_dir_entry *parent; - struct rb_root_cached subdir; + struct rb_root subdir; struct rb_node subdir_node; char *name; umode_t mode; u8 namelen; #ifdef CONFIG_64BIT -#define SIZEOF_PDE_INLINE_NAME (192-147) +#define SIZEOF_PDE_INLINE_NAME (192-139) #else -#define SIZEOF_PDE_INLINE_NAME (128-91) +#define SIZEOF_PDE_INLINE_NAME (128-87) #endif char inline_name[SIZEOF_PDE_INLINE_NAME]; } __randomize_layout; |