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Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Simon Horman , Shuah Khan , andrew+netdev@lunn.ch, linux-kernel@vger.kernel.org, willemb@google.com, linux-kselftest@vger.kernel.org Subject: Re: [net-next v2 2/3] selftests/net: Test PACKET_STATISTICS drops Message-ID: Mail-Followup-To: Joe Damato , Willem de Bruijn , netdev@vger.kernel.org, "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Simon Horman , Shuah Khan , andrew+netdev@lunn.ch, linux-kernel@vger.kernel.org, willemb@google.com, linux-kselftest@vger.kernel.org References: <20260403233240.178948-1-joe@dama.to> <20260403233240.178948-3-joe@dama.to> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: On Sat, Apr 04, 2026 at 11:08:15AM -0400, Willem de Bruijn wrote: > Joe Damato wrote: [...] > > @@ -396,6 +424,11 @@ static void run_test(void) > > > > total_len = do_tx(); > > > > + if (cfg_drop) { > > + check_packet_stats(fds); > > + goto out; > > + } > > Sashiko pointed out In the future, please link to the AI report. > that there may be a race here between rx > processing in the softirq and check_packet_stats. Seems plausible. Can you elaborate why this is true? I could be wrong, but I scanned the code and __local_bh_enable_ip seems to run softirq synchronously in this case, so I think the code is correct.