netdev - Re: [PATCH net-next v2 0/5] bonding: patchset for rcu use in bonding

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Message-ID: <20131024093507.GA16787@redhat.com>
Date:	Thu, 24 Oct 2013 11:35:07 +0200
From:	Veaceslav Falico <vfalico@...hat.com>
To:	Ding Tianhong <dingtianhong@...wei.com>
Cc:	Jay Vosburgh <fubar@...ibm.com>,
	Andy Gospodarek <andy@...yhouse.net>,
	"David S. Miller" <davem@...emloft.net>,
	Nikolay Aleksandrov <nikolay@...hat.com>,
	Netdev <netdev@...r.kernel.org>
Subject: Re: [PATCH net-next v2 0/5] bonding: patchset for rcu use in bonding

On Thu, Oct 24, 2013 at 11:08:35AM +0800, Ding Tianhong wrote:
>Hi:
>
>The slave list will add and del by bond_master_upper_dev_link() and bond_upper_dev_unlink(),
>which will call call_netdevice_notifiers(), even it is safe to call it in write bond lock now,
>but we can't sure that whether it is safe later, because other drivers may deal NETDEV_CHANGEUPPER
>in sleep way, so I didn't admit move the bond_upper_dev_unlink() in write bond lock.
>
>now the bond_for_each_slave only protect by rtnl_lock(), maybe use bond_for_each_slave_rcu is a good
>way to protect slave list for bond, but as a system slow path, it is no need to transform bond_for_each_slave()
>to bond_for_each_slave_rcu() in slow path, so in the patchset, I will remove the unused read bond lock
>for monitor function, maybe it is a better way, I will wait to accept any relay for it.
>
>Thanks for the Veaceslav Falico opinion.

No problem.

Nacked-by: Veaceslav Falico <vfalico@...hat.com>

Now, please, make some normal changelogs, or convince David that I'm an
idiot.

>
>v2: add and modify commit for patchset and patch, it will be the first step for the whole patchset.
>
>Ding Tianhong (5):
>  bonding: remove bond read lock for bond_mii_monitor()
>  bonding: remove bond read lock for bond_alb_monitor()
>  bonding: remove bond read lock for bond_loadbalance_arp_mon()
>  bonding: remove bond read lock for bond_activebackup_arp_mon()
>  bonding: remove bond read lock for bond_3ad_state_machine_handler()
>
> drivers/net/bonding/bond_3ad.c  |   9 ++--
> drivers/net/bonding/bond_alb.c  |  20 ++------
> drivers/net/bonding/bond_main.c | 100 +++++++++++++---------------------------
> 3 files changed, 40 insertions(+), 89 deletions(-)
>
>-- 
>1.8.2.1
>
>
>
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