From: Simon Horman <horms@kernel.org>
To: Feng Tang <feng.tang@linux.alibaba.com>
Cc: Jakub Kicinski <kuba@kernel.org>,
"David S . Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
Paolo Abeni <pabeni@redhat.com>, Shuah Khan <shuah@kernel.org>,
Andi Kleen <ak@linux.intel.com>,
netdev@vger.kernel.org, linux-kselftest@vger.kernel.org,
linux-kernel@vger.kernel.org, bpf@vger.kernel.org
Subject: Re: [PATCH net-next v3] selftests: net: reuseport_bpf_numa: consider cpuless numa node
Date: Mon, 10 Aug 2026 14:29:29 +0100 [thread overview]
Message-ID: <20260810132929.GS51943@horms.kernel.org> (raw)
In-Reply-To: <20260807002436.43991-1-feng.tang@linux.alibaba.com>
On Fri, Aug 07, 2026 at 08:24:36AM +0800, Feng Tang wrote:
> reuseport_bpf_numa case failed when testing on a platform with CXL
> memory:
>
> #./reuseport_bpf_numa
> ---- IPv4 UDP ----
> send node 0, receive socket 0
> ./reuseport_bpf_numa: failed to pin to node: Invalid argument
>
> The root cause is that the platform has 2 numa nodes: node 0 has
> both cpu and memory, while node 1 is a CXL node which only has
> memory, and caused numa_run_on_node() to fail.
>
> Add sanity check to skip cpuless numa node for the numa binding test.
>
> Signed-off-by: Feng Tang <feng.tang@linux.alibaba.com>
> ---
> Changelog:
> since v2:
> * fix spelling issue (Jakub, Sashiko)
> * remove unnecessary 'inline' for is_cpuless_node() (Jakub)
>
> since v1:
> * address comments from Sashiko bot
> https://lore.kernel.org/all/20260730113738.41C901F000E9@smtp.kernel.org/
> * lift the cpuless node check out of send_from_node()
Reviewed-by: Simon Horman <horms@kernel.org>
prev parent reply other threads:[~2026-08-10 13:29 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-07 0:24 [PATCH net-next v3] selftests: net: reuseport_bpf_numa: consider cpuless numa node Feng Tang
2026-08-10 13:29 ` Simon Horman [this message]
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