From: Vladimir Oltean <olteanv@gmail.com>
To: Stephen Hemminger <stephen@networkplumber.org>
Cc: Eric Dumazet <edumazet@google.com>,
Eric Dumazet <eric.dumazet@gmail.com>,
Jakub Kicinski <kuba@kernel.org>, netdev <netdev@vger.kernel.org>,
Paul Gortmaker <paul.gortmaker@windriver.com>,
Jiri Benc <jbenc@redhat.com>, Or Gerlitz <ogerlitz@mellanox.com>,
Cong Wang <xiyou.wangcong@gmail.com>,
Jamal Hadi Salim <jhs@mojatatu.com>, Andrew Lunn <andrew@lunn.ch>,
Florian Fainelli <f.fainelli@gmail.com>
Subject: Re: Correct usage of dev_base_lock in 2020
Date: Mon, 30 Nov 2020 22:26:26 +0200 [thread overview]
Message-ID: <20201130202626.cnwzvzc6yhd745si@skbuf> (raw)
In-Reply-To: <20201130122129.21f9a910@hermes.local>
On Mon, Nov 30, 2020 at 12:21:29PM -0800, Stephen Hemminger wrote:
> if device is in a private list (in bond device), the way to handle
> this is to use dev_hold() to keep a ref count.
Correct, dev_hold is a tool that can also be used. But it is a tool that
does not solve the general problem - only particular ones. See the other
interesting callers of dev_get_stats in parisc, appldata, net_failover.
We can't ignore that RTNL is used for write-side locking forever.
next prev parent reply other threads:[~2020-11-30 20:27 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20201129182435.jgqfjbekqmmtaief@skbuf>
2020-11-29 20:58 ` Correct usage of dev_base_lock in 2020 Vladimir Oltean
2020-11-30 5:12 ` Stephen Hemminger
2020-11-30 10:41 ` Eric Dumazet
2020-11-30 18:14 ` Jakub Kicinski
2020-11-30 18:30 ` Eric Dumazet
2020-11-30 18:48 ` Vladimir Oltean
2020-11-30 19:00 ` Eric Dumazet
2020-11-30 19:03 ` Vladimir Oltean
2020-11-30 19:22 ` Eric Dumazet
2020-11-30 19:32 ` Vladimir Oltean
2020-11-30 21:41 ` Florian Fainelli
2020-11-30 19:46 ` Vladimir Oltean
2020-11-30 20:18 ` Eric Dumazet
2020-11-30 20:21 ` Stephen Hemminger
2020-11-30 20:26 ` Vladimir Oltean [this message]
2020-11-30 20:29 ` Eric Dumazet
2020-11-30 20:36 ` Vladimir Oltean
2020-11-30 20:43 ` Eric Dumazet
2020-11-30 20:50 ` Vladimir Oltean
2020-11-30 21:00 ` Eric Dumazet
2020-11-30 21:11 ` Vladimir Oltean
2020-11-30 21:46 ` Eric Dumazet
2020-11-30 21:53 ` Vladimir Oltean
2020-11-30 22:20 ` Eric Dumazet
2020-11-30 22:41 ` Vladimir Oltean
2020-12-01 14:42 ` Pablo Neira Ayuso
2020-12-01 18:58 ` Vladimir Oltean
2020-12-10 4:32 ` [PATCH] net: bonding: retrieve device statistics under RTNL, not RCU kernel test robot
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