netdev - Re: [PATCH net-next v3] net: Implement fault injection forcing skb reallocation

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Message-ID: <20241023-refined-precious-seahorse-52e0d9@leitao>
Date: Wed, 23 Oct 2024 02:32:42 -0700
From: Breno Leitao <leitao@...ian.org>
To: Bagas Sanjaya <bagasdotme@...il.com>
Cc: Akinobu Mita <akinobu.mita@...il.com>, Jonathan Corbet <corbet@....net>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>, kernel-team@...a.com,
	Pavel Begunkov <asml.silence@...il.com>,
	Mina Almasry <almasrymina@...gle.com>,
	Oleksij Rempel <o.rempel@...gutronix.de>,
	Kuniyuki Iwashima <kuniyu@...zon.com>,
	Alexander Lobakin <aleksander.lobakin@...el.com>,
	Linux Documentation <linux-doc@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Linux Networking <netdev@...r.kernel.org>
Subject: Re: [PATCH net-next v3] net: Implement fault injection forcing skb
 reallocation

Hello Bagas,

On Mon, Oct 21, 2024 at 07:35:29PM +0700, Bagas Sanjaya wrote:
> On Mon, Oct 14, 2024 at 06:50:00AM -0700, Breno Leitao wrote:
> > +  To select the interface to act on, write the network name to the following file:
> > +  `/sys/kernel/debug/fail_net_force_skb_realloc/devname`
> "... write the network name to /sys/kernel/debug/fail_net_force_skb_realloc/devname."
> > +  If this field is left empty (which is the default value), skb reallocation
> > +  will be forced on all network interfaces.
> > +
> > <snipped>...
> > +- /sys/kernel/debug/fail_net_force_skb_realloc/devname:
> > +
> > +        Specifies the network interface on which to force SKB reallocation.  If
> > +        left empty, SKB reallocation will be applied to all network interfaces.
> > +
> > +        Example usage:
> > +        # Force skb reallocation on eth0
> > +        echo "eth0" > /sys/kernel/debug/fail_net_force_skb_realloc/devname
> > +
> > +        # Clear the selection and force skb reallocation on all interfaces
> > +        echo "" > /sys/kernel/debug/fail_net_force_skb_realloc/devname
> 
> The examples rendered as normal paragraph instead (and look like long-running
> sentences) so I wrap them in literal code blocks:

Thanks. I will update it, and send a new version.