From mboxrd@z Thu Jan  1 00:00:00 1970
From: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Subject: Re: [PATCH linux v3 1/1] fs/proc: use a rb tree for the directory
 entries
Date: Mon, 13 Oct 2014 13:14:51 +0200
Message-ID: <543BB42B.30505@6wind.com>
References: <20141006.181448.1696747135961247651.davem@davemloft.net> <1412672559-5256-1-git-send-email-nicolas.dichtel@6wind.com> <1412672559-5256-2-git-send-email-nicolas.dichtel@6wind.com>
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Cc: davem@davemloft.net, ebiederm@xmission.com,
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	Linus Torvalds <torvalds@linux-foundation.org>
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Le 07/10/2014 11:02, Nicolas Dichtel a =C3=A9crit :
> The current implementation for the directories in /proc is using a si=
ngle
> linked list. This is slow when handling directories with large number=
s 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'.
>
> Before the patch:
> $ time ip -b dummy30000.batch
> real	2m31.950s
> user	0m0.440s
> sys	2m21.440s
> $ time rmmod dummy
> real	1m35.764s
> user	0m0.000s
> sys	1m24.088s
>
> After the patch:
> $ time ip -b dummy30000.batch
> real	2m0.874s
> user	0m0.448s
> sys	1m49.720s
> $ time rmmod dummy
> real	1m13.988s
> user	0m0.000s
> sys	1m1.008s
>
> The idea of improving this part was suggested by
> Thierry Herbelot <thierry.herbelot@6wind.com>.
>
> Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
> Acked-by: David S. Miller <davem@davemloft.net>
> ---

I'm not sure who is in charge of taking this patch. Should I resend it =
to
someone else or is it already included in a tree?


Thank you,
Nicolas