Messages in this thread | | | Date | Thu, 4 Mar 2021 08:44:52 +0100 | From | Florian Westphal <> | Subject | Re: [PATCH 2/3] Revert "netfilter: x_tables: Switch synchronization to RCU" |
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Mark Tomlinson <mark.tomlinson@alliedtelesis.co.nz> wrote: > This reverts commit cc00bcaa589914096edef7fb87ca5cee4a166b5c. > > This (and the preceding) patch basically re-implemented the RCU > mechanisms of patch 784544739a25. That patch was replaced because of the > performance problems that it created when replacing tables. Now, we have > the same issue: the call to synchronize_rcu() makes replacing tables > slower by as much as an order of magnitude.
Can you give roigh numbers?
> See https://lore.kernel.org/patchwork/patch/151796/ for why using RCU is > not a good idea.
Please, no link.
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