Re: regression: sysctl_check changes in 2.6.24 are O(n) resulting in slow creation of 10000 network interfaces

Andi Kleen
2008-01-07T20:45:31Z

David Miller <davem@davemloft.net> writes:
>
>> So is this a bug report telling me that there are users with
>> 10k or 100k interfaces that care. So we need to fix sysctl.
>
> Unquestionably, we do, it's a major regression.
>
> People create thousands of VLAN devices, as one of many examples, all
> the time.

It might be an reasonable option to just stop creating sysctl entries
for interfaces after some threshold. I presume people who have that
many interfaces will mostly work through {default,all}/* anyways.

I think that would be a better option than to complicate sysctl.c
for this uncommon case.

-Andi