lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  PHC 
Open Source and information security mailing list archives
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:	Mon, 29 Sep 2014 05:12:19 -0700
From:	Eric Dumazet <>
To:	Fugang Duan <>
Subject: Re: [PATCH v2 1/1] net: fec: implement rx_copybreak to improve rx

On Mon, 2014-09-29 at 15:47 +0800, Fugang Duan wrote:
> - Copy short frames and keep the buffers mapped, re-allocate skb instead of
>   memory copy for long frames.
> - Add support for setting/getting rx_copybreak using generic ethtool tunable
> Changes V2:
> * Implements rx_copybreak

> +#define COPYBREAK_DEFAULT 256
> +static unsigned int copybreak __read_mostly = COPYBREAK_DEFAULT;
> +module_param(copybreak, uint, 0644);
> +MODULE_PARM_DESC(copybreak,
> +		 "Maximum packet size that is copied to a new buffer on receive");
> +

It is not the right way to handle this.

Old drivers might still have a legacy module parameter.

New implementations should provide the new ethtool support, and only
this. No new module parameter is accepted.

For details, check following commits :

d4ad30b182305ecf97f145a5d4d1fd9e728c6d01 enic: Add tunable_ops support
for rx_copybreak

f0db9b073415848709dd59a6394969882f517da9 ethtool: Add generic options
for tunables

Or check the current tree :

git grep -n rx_copybreak drivers/net/ethernet/cisco/enic

To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to
More majordomo info at

Powered by blists - more mailing lists