Comment 110 for bug 417757
Revision history for this message
| Martin Pitt (pitti) wrote Re: [karmic regression] all network apps / browsers suffer from multi-second delays by default due to IPv6 DNS lookups | #110 |
The RH workaround with a preload library isn't something that we could sensibly put into an SRU, since you'd have to preload it for every single program that does DNS resolution (and there are thousands in the archive).
Just to ensure that we are all talking about the same thing, this is what I see:
$ time host www.ubuntu.com
www.ubuntu.com has address 91.189.90.40 <- appears immediately
[20 second pause here]
;; connection timed out; no servers could be reached
;; connection timed out; no servers could be reached
real 0m20.371s
user 0m0.000s
sys 0m0.050s
> and why not blacklisting the loading of the ipv6 module instead of replacing system functions like that?
IPv6 is built into our kernel, there are no modules. But perhaps we could modularize those in the kernel? Kernel team, does the Jaunty kernel have a different IPv6 setup than Lucid? We didn't have this problem in Jaunty, and I don't believe it's a glibc regression (since a jaunty chroot on karmic kernel has the same problem).