linux-kernel - Re: [PATCH linux v2 1/1] fs/proc: use a rb tree for the directory entries

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Message-Id: <20141006.181448.1696747135961247651.davem@davemloft.net>
Date:	Mon, 06 Oct 2014 18:14:48 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	nicolas.dichtel@...nd.com
Cc:	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	ebiederm@...ssion.com, akpm@...ux-foundation.org,
	adobriyan@...il.com, rui.xiang@...wei.com, viro@...iv.linux.org.uk,
	oleg@...hat.com, gorcunov@...nvz.org,
	kirill.shutemov@...ux.intel.com, grant.likely@...retlab.ca,
	tytso@....edu
Subject: Re: [PATCH linux v2 1/1] fs/proc: use a rb tree for the directory
 entries

From: Nicolas Dichtel <nicolas.dichtel@...nd.com>
Date: Mon,  6 Oct 2014 16:30:34 +0200

> 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.
> 
> Here are some numbers:
> 
> dummy30000.batch contains 30 000 times 'link add type dummy'.
 ...
> Signed-off-by: Nicolas Dichtel <nicolas.dichtel@...nd.com>

FWIW:

Acked-by: David S. Miller <davem@...emloft.net>
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