From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3C6112FB61D for ; Wed, 22 Oct 2025 07:40:09 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.129.124 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761118812; cv=none; b=HTuDdC4KCKtL5PhHtKMsTelkvyVih3gF3nuev5HzReeGIdFRHAB3XgbcCMDjR4XP6Hs6wpo5TwCa7xye53k3nfdFPyBVFaUw7AL2owTTbsQUr7P6hNrXGkmmN62PpLCG6bGLYrek+JVRR+oZTSV0FQaERd40RJX9cjgovB46sM0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761118812; c=relaxed/simple; bh=xnlybXhe4Gk3+/T7ptK9m5/2M+M5ja4gQq27GB7rFEA=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version:content-type; b=oVlLp/tsDrdNExSpwSXgTY+2h2SD0WWWpzYYAdUK1VYiNgtA0uVaSPiMWbAtHLKRJ+MEPKME66IcW7VjKZF51rSbxUzLkUS4LvVHkRmCJ4hOWRsPamMDd1sTkOgtIjc8135Becjf1DzhAtS9XvfMJE8qn7J3s/3mUXNpXGNfpPc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=Ap0++xGg; arc=none smtp.client-ip=170.10.129.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="Ap0++xGg" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1761118808; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=0LDpEXVqV1qq3k8fA75o1w3qUBLgt2mPulvuQWFEYPI=; b=Ap0++xGgy3zLw/zwCSh0O80spWYTxyF/p+Me1QMq5U/39InjhJGdmLxb0Vjfp9ihnrkx+M qDozg/qknRnupptGTLXZDsE1sFtjTLqNe9blasZsXGYmW9F2wgyiWumLfWJoUsGPJ+PZwC EZqDPTc9ANozGdbiqiWAMf6QGqf1F8E= Received: from mx-prod-mc-08.mail-002.prod.us-west-2.aws.redhat.com (ec2-35-165-154-97.us-west-2.compute.amazonaws.com [35.165.154.97]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-641-AmdPjc7IPJSglBul5nyiDA-1; Wed, 22 Oct 2025 03:40:05 -0400 X-MC-Unique: AmdPjc7IPJSglBul5nyiDA-1 X-Mimecast-MFC-AGG-ID: AmdPjc7IPJSglBul5nyiDA_1761118804 Received: from mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.4]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-08.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id A484618001D6; Wed, 22 Oct 2025 07:40:04 +0000 (UTC) Received: from gerbillo.redhat.com (unknown [10.45.225.237]) by mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 2A11430001BF; Wed, 22 Oct 2025 07:40:02 +0000 (UTC) From: Paolo Abeni To: mptcp@lists.linux.dev Cc: geliang@kernel.org, Mat Martineau Subject: [PATCH v2 mptcp-net 0/2] mptcp: restore zero window probe Date: Wed, 22 Oct 2025 09:39:57 +0200 Message-ID: Precedence: bulk X-Mailing-List: mptcp@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.4 X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: EWZYVTnipXeJ_dyqfgd42t5LaGEHT0k9Emz-utGqwoY_1761118804 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: 8bit content-type: text/plain; charset="US-ASCII"; x-default=true It turns out that the issue reported by Geliang on the pending backlog patches is actually on older one that the new code made more easy reproducible. The first patch in the series addresses it[1], the 2nd one introduce new mibs to hopefully catch this problem sooned. I have a pktdrill to validate this scenario. I'll share that soon. @Geliang could you please validate the above in your testbed, on top of the backlog and splice patches? [1] at least here, at least with the packet drill reproducer ;) --- v1 -> v2: - drop unneeded delta in patch 1/2 Paolo Abeni (2): mptcp: restore window probe mptcp: zero window probe mib net/mptcp/mib.c | 1 + net/mptcp/mib.h | 1 + net/mptcp/protocol.c | 8 +++++++- 3 files changed, 9 insertions(+), 1 deletion(-) -- 2.51.0