From: Jakub Kicinski <kuba@kernel.org>
To: Przemek Kitszel <przemyslaw.kitszel@intel.com>
Cc: <netdev@vger.kernel.org>, <jiri@resnulli.us>,
<anthony.l.nguyen@intel.com>, <edumazet@google.com>,
<pabeni@redhat.com>, <andrew+netdev@lunn.ch>, <horms@kernel.org>,
<jdamato@fastly.com>, <davem@davemloft.net>
Subject: Re: [PATCH net-next v2 01/11] net: add netdev_lock() / netdev_unlock() helpers
Date: Wed, 15 Jan 2025 06:08:53 -0800 [thread overview]
Message-ID: <20250115060853.0f592332@kernel.org> (raw)
In-Reply-To: <e7479c79-525d-4796-b9ed-7ae2ddb5435b@intel.com>
On Wed, 15 Jan 2025 09:36:11 +0100 Przemek Kitszel wrote:
> > diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
> > index bced03fb349e..891c5bdb894c 100644
> > --- a/include/linux/netdevice.h
> > +++ b/include/linux/netdevice.h
> > @@ -2444,8 +2444,12 @@ struct net_device {
> > u32 napi_defer_hard_irqs;
> >
> > /**
> > - * @lock: protects @net_shaper_hierarchy, feel free to use for other
> > - * netdev-scope protection. Ordering: take after rtnl_lock.
> > + * @lock: netdev-scope lock, protects a small selection of fields.
> > + * Should always be taken using netdev_lock() / netdev_unlock() helpers.
> > + * Drivers are free to use it for other protection.
>
> As with devl_lock(), would be good to specify the ordering for those who
> happen to take both. My guess is that devl_lock() is after netdev_lock()
The ordering is transitive, since devl_ is before rtnl_ there is
no ambiguity. Or so I think :)
next prev parent reply other threads:[~2025-01-15 14:08 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-01-15 3:53 [PATCH net-next v2 00/11] net: use netdev->lock to protect NAPI Jakub Kicinski
2025-01-15 3:53 ` [PATCH net-next v2 01/11] net: add netdev_lock() / netdev_unlock() helpers Jakub Kicinski
2025-01-15 8:21 ` Kuniyuki Iwashima
2025-01-15 8:36 ` Przemek Kitszel
2025-01-15 9:24 ` Ido Schimmel
2025-01-15 14:08 ` Jakub Kicinski [this message]
2025-01-15 14:24 ` Przemek Kitszel
2025-01-15 3:53 ` [PATCH net-next v2 02/11] net: make netdev_lock() protect netdev->reg_state Jakub Kicinski
2025-01-15 8:30 ` Kuniyuki Iwashima
2025-01-15 14:18 ` Jakub Kicinski
2025-01-15 3:53 ` [PATCH net-next v2 03/11] net: add helpers for lookup and walking netdevs under netdev_lock() Jakub Kicinski
2025-01-15 8:41 ` Kuniyuki Iwashima
2025-01-15 3:53 ` [PATCH net-next v2 04/11] net: add netdev->up protected by netdev_lock() Jakub Kicinski
2025-01-15 8:45 ` Kuniyuki Iwashima
2025-01-15 3:53 ` [PATCH net-next v2 05/11] net: protect netdev->napi_list with netdev_lock() Jakub Kicinski
2025-01-15 8:57 ` Kuniyuki Iwashima
2025-01-17 22:21 ` Eric Dumazet
2025-01-17 22:52 ` Jakub Kicinski
2025-01-15 3:53 ` [PATCH net-next v2 06/11] net: protect NAPI enablement " Jakub Kicinski
2025-01-15 9:02 ` Kuniyuki Iwashima
2025-01-21 8:32 ` Dan Carpenter
2025-01-21 8:50 ` David Laight
2025-01-21 15:27 ` Dan Carpenter
2025-01-15 3:53 ` [PATCH net-next v2 07/11] net: make netdev netlink ops hold netdev_lock() Jakub Kicinski
2025-01-15 9:07 ` Kuniyuki Iwashima
2025-01-15 3:53 ` [PATCH net-next v2 08/11] net: protect threaded status of NAPI with netdev_lock() Jakub Kicinski
2025-01-15 9:09 ` Kuniyuki Iwashima
2025-01-15 3:53 ` [PATCH net-next v2 09/11] net: protect napi->irq " Jakub Kicinski
2025-01-15 9:12 ` Kuniyuki Iwashima
2025-01-15 3:53 ` [PATCH net-next v2 10/11] net: protect NAPI config fields " Jakub Kicinski
2025-01-15 9:15 ` Kuniyuki Iwashima
2025-01-15 3:53 ` [PATCH net-next v2 11/11] netdev-genl: remove rtnl_lock protection from NAPI ops Jakub Kicinski
2025-01-15 9:18 ` Kuniyuki Iwashima
2025-01-16 3:30 ` [PATCH net-next v2 00/11] net: use netdev->lock to protect NAPI patchwork-bot+netdevbpf
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