Re: 100 network limit

[Ben Greear <greearb@xxxxxxxxxxxxxxx>]

David S. Miller wrote:
> On Thu, 28 Aug 2003 14:46:39 -0700
> Ben Greear <greearb@xxxxxxxxxxxxxxx> wrote:
>
>
> > Since you can rename devices, that might not work.  A long time ago
> > I hashed the devices, both by name and by index...that gives good
> > lookup performance, at least.  As for create-time issues, that is
> > definately slow path, and even searching linearly 4 or 8k devices is
> > not a big deal (in my opinion).  So, why not make the hard-coded 100
> > limit be more like 8196 or something really large?  (It could still
> > be adjustable if needed.)
>
>
> Right, it's also not going to fix the locking problems.
>
> I would suggest two things:
>
> 1) Ben's hashing patch for lookups.
>
> 2) RCU'ing read access to the device list.

I'm at least mostly on vacation for a week or so...  Here is a pointer
to the old patch I did..but it's ~2.5 years old.  If anyone wants
to get it working with recent code, please be my guest.

Otherwise, I'll try to get something together in a few weeks.

http://www.cs.helsinki.fi/linux/linux-kernel/2001-00/1227.html

Take it easy,
Ben

--
Ben Greear <greearb@xxxxxxxxxxxxxxx>
Candela Technologies Inc  http://www.candelatech.com