Re: [PATCH] improvement on net/sched/cls_fw.c's hash function

[Thomas Graf <tgraf@xxxxxxx>]

* Thomas Graf <20050406134502.GP26731@xxxxxxxxxxxxxx> 2005-04-06 15:45
> * jamal <1112794459.1096.61.camel@xxxxxxxxxxxxxxxx> 2005-04-06 09:34
> > When does the user specify this? i would think you need to set it once
> > only per bootup. After that it will be quiet complex to reset. It could
> > be done but sounds complex and unnecessary. i.e it may be a boot or
> > module parameter more than it is a netlink controlled value, no?
> 
> I'm not 100% sure about this yet but I think during fw_change so
> we can have different hashes for different qdiscs filter chains.

The thing I'm worrying about is that I don't want to break the perfect
alignment of fw_head to good slab obj sizes but I guess there is no
way around. I'd really like to make hash size and hash function
configureable. For example a hash size of 1024 would perform much
better and would still fit into a single page on most systems.