OpenVZ Forum


Home » Mailing lists » Devel » [PATCH 2.6.21-rc6] [netfilter] early_drop imrovement
Re: [NETFILTER] early_drop() imrovement (v4) [message #14605 is a reply to message #14588] Tue, 03 July 2007 11:42 Go to previous messageGo to previous message
Patrick McHardy is currently offline  Patrick McHardy
Messages: 107
Registered: March 2006
Senior Member
Rusty Russell wrote:
> On Wed, 2007-06-27 at 15:54 +0200, Patrick McHardy wrote:
>
>>[NETFILTER]: nf_conntrack: early_drop improvement
>
> This looks good. The randomness in the hash means we no longer need the
> "hit the same hash bucket" heuristic to avoid hashbombing.
>
> I still wonder if we should batch up the drops a little while we're
> doing all this work? Should reduce stress under serious flood load.


Good point, I didn't think of that. Its a bit tricky though, we can't
destroy them while holding nf_conntrack_lock, so we'd either have to
release and re-grab it for every conntrack we want to kill or write
lock it from the beginning, clean them from the lists immediately and
put them on a temporary destruction queue. Or split death_by_timeout
so it can deal with callers already holding nf_conntrack_lock ..

I'll see if I can come up with a halfway decent looking patch :)

Report message to a moderator

[Message index]
 
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Previous Topic: [PATCH 1/2] signal checkpoint: define /proc/pid/sig/
Next Topic: [PATCH] .gitignore update
Goto Forum:
  

[ Syndicate this forum (XML) ] [ RSS ] [ PDF ]

Current Time: Thu Oct 09 16:46:10 GMT 2025

Total time taken to generate the page: 0.13330 seconds
Powered by FUDforum Powered by Virtuozzo Containers