linux-kernel - Re: [PATCH net-next] idpf: Slightly simplify memory management in idpf_add_del_mac

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Message-ID: <20240823161249.GV2164@kernel.org>
Date: Fri, 23 Aug 2024 17:12:49 +0100
From: Simon Horman <horms@...nel.org>
To: Christophe JAILLET <christophe.jaillet@...adoo.fr>
Cc: Tony Nguyen <anthony.l.nguyen@...el.com>,
	Przemek Kitszel <przemyslaw.kitszel@...el.com>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org,
	intel-wired-lan@...ts.osuosl.org, netdev@...r.kernel.org
Subject: Re: [PATCH net-next] idpf: Slightly simplify memory management in
 idpf_add_del_mac_filters()

On Fri, Aug 23, 2024 at 08:23:29AM +0200, Christophe JAILLET wrote:
> In idpf_add_del_mac_filters(), filters are chunked up into multiple
> messages to avoid sending a control queue message buffer that is too large.
> 
> Each chunk has up to IDPF_NUM_FILTERS_PER_MSG entries. So except for the
> last iteration which can be smaller, space for exactly
> IDPF_NUM_FILTERS_PER_MSG entries is allocated.
> 
> There is no need to free and reallocate a smaller array just for the last
> iteration.
> 
> This slightly simplifies the code and avoid an (unlikely) memory allocation
> failure.
> 
> Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>

Reviewed-by: Simon Horman <horms@...nel.org>