Le 07/10/2014 11:02, Nicolas Dichtel a écrit :
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.herbe...@6wind.com>.
Signed-off-by: Nicolas Dichtel <nicolas.dich...@6wind.com>
Acked-by: David S. Miller <da...@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
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