netdev - Re: [PATCH net-next v1 0/4] net: remove rtnl_lock from the callers of queue APIs

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Message-ID: <20250307192234.2f8be6b9@kernel.org>
Date: Fri, 7 Mar 2025 19:22:34 -0800
From: Jakub Kicinski <kuba@...nel.org>
To: Stanislav Fomichev <sdf@...ichev.me>
Cc: netdev@...r.kernel.org, davem@...emloft.net, edumazet@...gle.com,
 pabeni@...hat.com, linux-kernel@...r.kernel.org, horms@...nel.org,
 donald.hunter@...il.com, michael.chan@...adcom.com,
 pavan.chebbi@...adcom.com, andrew+netdev@...n.ch, jdamato@...tly.com,
 xuanzhuo@...ux.alibaba.com, almasrymina@...gle.com, asml.silence@...il.com,
 dw@...idwei.uk
Subject: Re: [PATCH net-next v1 0/4] net: remove rtnl_lock from the callers
 of queue APIs

On Fri,  7 Mar 2025 07:57:21 -0800 Stanislav Fomichev wrote:
> All drivers that use queue management APIs already depend on the netdev
> lock. Ultimately, we want to have most of the paths that work with
> specific netdev to be rtnl_lock-free (ethtool mostly in particular).
> Queue API currently has a much smaller API surface, so start with
> rtnl_lock from it:
> 
> - add mutex to each dmabuf binding (to replace rtnl_lock)
> - protect global net_devmem_dmabuf_bindings with a new (global) lock
> - move netdev lock management to the callers of netdev_rx_queue_restart
>   and drop rtnl_lock

One more note, looks like this silently conflicts with my:
https://lore.kernel.org/all/20250307183006.2312761-1-kuba@kernel.org/

You need to add:

#include <net/netdev_lock.h>

to net/core/netdev_rx_queue.c, otherwise the series together break 
the build.