From: Eric Dumazet <eric.dumazet@gmail.com>
To: Kirill Tkhai <ktkhai@virtuozzo.com>,
davem@davemloft.net, yoshfuji@linux-ipv6.org,
netdev@vger.kernel.org
Cc: Yuval Mintz <yuvalm@mellanox.com>
Subject: Re: [PATCH RESEND net-next] net: Do synchronize_rcu() in ip6mr_sk_done() only if this is needed
Date: Tue, 06 Mar 2018 09:20:31 -0800 [thread overview]
Message-ID: <1520356831.109662.25.camel@gmail.com> (raw)
In-Reply-To: <1520355533.109662.24.camel@gmail.com>
On Tue, 2018-03-06 at 08:58 -0800, Eric Dumazet wrote:
>
> To be clear, your patch is fine Kirill,
>
> I am only sad seeing one can add a synchronize_rcu() in hot path
> without anyone complaining during code review.
lpaa2:~# time for i in {1..1000}; do unshare -n /bin/false;done
real 7m18.911s
user 0m0.185s
sys 0m2.314s
Instead of less than 10 seconds not a long time ago :/
next prev parent reply other threads:[~2018-03-06 17:20 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-06 16:24 [PATCH RESEND net-next] net: Do synchronize_rcu() in ip6mr_sk_done() only if this is needed Kirill Tkhai
2018-03-06 16:50 ` Eric Dumazet
2018-03-06 16:58 ` Eric Dumazet
2018-03-06 17:20 ` Eric Dumazet [this message]
2018-03-07 9:22 ` Kirill Tkhai
2018-03-07 9:32 ` Kirill Tkhai
2018-03-07 13:51 ` Yuval Mintz
2018-03-07 14:22 ` Eric Dumazet
2018-03-07 16:43 ` [PATCH net-next] ip6mr: remove synchronize_rcu() in favor of SOCK_RCU_FREE Eric Dumazet
2018-03-07 22:11 ` Kirill Tkhai
2018-03-07 23:14 ` David Miller
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