From: Pablo Neira Ayuso <pablo@netfilter.org>
To: Mark Tomlinson <mark.tomlinson@alliedtelesis.co.nz>
Cc: kadlec@netfilter.org, fw@strlen.de, subashab@codeaurora.org,
netfilter-devel@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2 0/3] Don't use RCU for x_tables synchronization
Date: Mon, 15 Mar 2021 18:42:17 +0100 [thread overview]
Message-ID: <20210315174217.GA25425@salvia> (raw)
In-Reply-To: <20210308012413.14383-1-mark.tomlinson@alliedtelesis.co.nz>
On Mon, Mar 08, 2021 at 02:24:10PM +1300, Mark Tomlinson wrote:
> The patches to change to using RCU synchronization in x_tables cause
> updating tables to be slowed down by an order of magnitude. This has
> been tried before, see https://lore.kernel.org/patchwork/patch/151796/
> and ultimately was rejected. As mentioned in the patch description, a
> different method can be used to ensure ordering of reads/writes. This
> can simply be done by changing from smp_wmb() to smp_mb().
Applied.
prev parent reply other threads:[~2021-03-15 17:45 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-08 1:24 [PATCH v2 0/3] Don't use RCU for x_tables synchronization Mark Tomlinson
2021-03-08 1:24 ` [PATCH v2 1/3] Revert "netfilter: x_tables: Update remaining dereference to RCU" Mark Tomlinson
2021-03-08 1:24 ` [PATCH v2 2/3] Revert "netfilter: x_tables: Switch synchronization " Mark Tomlinson
2021-03-08 1:24 ` [PATCH v2 3/3] netfilter: x_tables: Use correct memory barriers Mark Tomlinson
2021-03-09 11:33 ` Florian Westphal
2021-03-11 15:51 ` [PATCH v2 0/3] Don't use RCU for x_tables synchronization Tyler Hicks
2021-03-15 17:42 ` Pablo Neira Ayuso [this message]
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