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Date: Thu, 12 Feb 2026 13:55:06 +0000
From: Simon Horman <horms@kernel.org>
To: Petr Machata <petrm@nvidia.com>
Cc: "David S. Miller" <davem@davemloft.net>,
	Eric Dumazet <edumazet@google.com>,
	Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
	Andrew Lunn <andrew+netdev@lunn.ch>, netdev@vger.kernel.org,
	Ido Schimmel <idosch@nvidia.com>, mlxsw@nvidia.com
Subject: Re: [PATCH net] selftests: mlxsw: tc_restrictions: Fix test failure
 with new iproute2
Message-ID: <aY3bujP8mB2vDhTk@horms.kernel.org>
References: <88b00c6e85188aa6a065dc240206119b328c46e1.1770643998.git.petrm@nvidia.com>
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In-Reply-To: <88b00c6e85188aa6a065dc240206119b328c46e1.1770643998.git.petrm@nvidia.com>

On Mon, Feb 09, 2026 at 02:53:53PM +0100, Petr Machata wrote:
> From: Ido Schimmel <idosch@nvidia.com>
> 
> As explained in [1], iproute2 started rejecting tc-police burst sizes
> that result in an overflow. This can happen when the burst size is high
> enough and the rate is low enough.
> 
> A couple of test cases specify such configurations, resulting in
> iproute2 errors and test failure.
> 
> Fix by reducing the burst size so that the test will pass with both new
> and old iproute2 versions.
> 
> [1] https://lore.kernel.org/netdev/20250916215731.3431465-1-jay.vosburgh@canonical.com/
> 
> Fixes: cb12d1763267 ("selftests: mlxsw: tc_restrictions: Test tc-police restrictions")
> Signed-off-by: Ido Schimmel <idosch@nvidia.com>
> Signed-off-by: Petr Machata <petrm@nvidia.com>

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