* nf_nat_cleanup_conntrack performance with rhlist
@ 2017-09-06 11:53 Ivan Babrou
2017-09-06 12:39 ` Florian Westphal
0 siblings, 1 reply; 2+ messages in thread
From: Ivan Babrou @ 2017-09-06 11:53 UTC (permalink / raw)
To: netfilter-devel, fw, pablo
Hello,
We hit a bug where nf_nat_cleanup_conntrack is taking exponential amount of time
if you ping a lot of distinct IPs. It seems to be related to hlist ->
rhlist migration.
Here's the bugzilla ticket:
* https://bugzilla.kernel.org/show_bug.cgi?id=196821
It has a reproduce script and the list of reverts that bring back
reasonable performance.
Dev mailing list seems like a good place to notify the right people.
The first email got rejected because of html subpart, apologies for
the duplicate.
Thanks.
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: nf_nat_cleanup_conntrack performance with rhlist
2017-09-06 11:53 nf_nat_cleanup_conntrack performance with rhlist Ivan Babrou
@ 2017-09-06 12:39 ` Florian Westphal
0 siblings, 0 replies; 2+ messages in thread
From: Florian Westphal @ 2017-09-06 12:39 UTC (permalink / raw)
To: Ivan Babrou; +Cc: netfilter-devel, fw, pablo
Ivan Babrou <ibobrik@gmail.com> wrote:
> Hello,
>
> We hit a bug where nf_nat_cleanup_conntrack is taking exponential amount of time
> if you ping a lot of distinct IPs. It seems to be related to hlist ->
> rhlist migration.
Yes, and its best to revert, I sent patches to do just that.
Thanks for the heads-up.
^ permalink raw reply [flat|nested] 2+ messages in thread
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2017-09-06 11:53 nf_nat_cleanup_conntrack performance with rhlist Ivan Babrou
2017-09-06 12:39 ` Florian Westphal
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