Re: [PATCH linux v3 1/1] fs/proc: use a rb tree for the directory entries

[Nicolas Dichtel]

Le 07/10/2014 11:02, Nicolas Dichtel a Ãcrit :
> 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'.
>
> 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@xxxxxxxxx>.
>
> Signed-off-by: Nicolas Dichtel <nicolas.dichtel@xxxxxxxxx>
> Acked-by: David S. Miller <davem@xxxxxxxxxxxxx>
> ---

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
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