From: David Miller <davem@davemloft.net>
To: tgraf@suug.ch
Cc: davem@davemloft.ne, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org, eric.dumazet@gmail.com
Subject: Re: [PATCH] netlink: Re-add locking to netlink_lookup() and seq walker
Date: Tue, 21 Oct 2014 21:36:04 -0400 (EDT) [thread overview]
Message-ID: <20141021.213604.498626106621926349.davem@davemloft.net> (raw)
In-Reply-To: <14101d52c64e0d52176ca0d4b8888f8cf20ab9b0.1413921873.git.tgraf@suug.ch>
From: Thomas Graf <tgraf@suug.ch>
Date: Tue, 21 Oct 2014 22:05:38 +0200
> The synchronize_rcu() in netlink_release() introduces unacceptable
> latency. Reintroduce minimal lookup so we can drop the
> synchronize_rcu() until socket destruction has been RCUfied.
>
> Cc: David S. Miller <davem@davemloft.net>
> Cc: Eric Dumazet <eric.dumazet@gmail.com>
> Reported-by: Steinar H. Gunderson <sgunderson@bigfoot.com>
> Reported-and-tested-by: Heiko Carstens <heiko.carstens@de.ibm.com>
> Signed-off-by: Thomas Graf <tgraf@suug.ch>
Applied and queued up for -stable.
Please use an appropriate "Fixes: " tag in the future, this is
especially important for an issue as serious as this one.
Thanks.
next prev parent reply other threads:[~2014-10-22 1:36 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-10-21 20:05 [PATCH] netlink: Re-add locking to netlink_lookup() and seq walker Thomas Graf
2014-10-22 1:36 ` David Miller [this message]
-- strict thread matches above, loose matches on Subject: below --
2014-10-11 8:36 [bisected] e341694e3eb5 netlink_lookup() rcu conversion causes latencies Heiko Carstens
2014-10-11 19:32 ` Eric Dumazet
2014-10-11 22:25 ` Thomas Graf
2014-10-20 8:21 ` Heiko Carstens
2014-10-20 19:53 ` [PATCH] netlink: Re-add locking to netlink_lookup() and seq walker Thomas Graf
2014-10-21 7:04 ` Heiko Carstens
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