On Tue, 7 Oct 2014 11:02:39 +0200 Nicolas Dichtel <nicolas.dich...@6wind.com>
wrote:
> The current implementation for the directories in /proc is using a single
> linked list. This is slow when handling directories with large numbers of
> entries (eg netdevice-related entries when lots of tunnels are opened).
>
> This patch replaces this linked list by a red-black tree.
>
> ...
>
> --- a/fs/proc/root.c
> +++ b/fs/proc/root.c
> @@ -166,6 +166,7 @@ void __init proc_root_init(void)
> {
> int err;
>
> + proc_root.subdir = RB_ROOT;
> proc_init_inodecache();
> err = register_filesystem(&proc_fs_type);
> if (err)
This can be done at compile time can't it?
--- a/fs/proc/root.c~fs-proc-use-a-rb-tree-for-the-directory-entries-fix
+++ a/fs/proc/root.c
@@ -166,7 +166,6 @@ void __init proc_root_init(void)
{
int err;
- proc_root.subdir = RB_ROOT;
proc_init_inodecache();
err = register_filesystem(&proc_fs_type);
if (err)
@@ -252,6 +251,7 @@ struct proc_dir_entry proc_root = {
.proc_iops = &proc_root_inode_operations,
.proc_fops = &proc_root_operations,
.parent = &proc_root,
+ .subdir = RB_ROOT,
.name = "/proc",
};
_
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