From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Google-Smtp-Source: AG47ELspYRzfXZuEstyEOeoYKDKnwy9oHc/kDoAIxrhZIkTnLvP3z9y4uIyEUhUMjrOaxAHKBNEN ARC-Seal: i=1; a=rsa-sha256; t=1521484071; cv=none; d=google.com; s=arc-20160816; b=OvLuJYakzXlKDuo9/Zdan+3weOUimg3YTnWM5F2FpSP9AkfkcHUsu9xl5YeeEiQbQJ H06EaH0eZ58PUxVW47qVFj2APst4RtJkDE85oU4EaJZ3sqZfZc04DkDnKkB7spP3ZEha wPxdg97XFJVk3+2tegVO1vIVWTPh+zSy4BrkjMbDrZ2r9AqVjrg9hFaERZed4BxSzX9t zHEtr6Y4QQt+bhM0qz++eC3HOaCgC+YSuLdo+LSDBrumZXRhf2whNuj8PpkDvJfZK8Fv Tykbmsst9RM4Fjle8/d80YO3SwAR/9T2P4Q8QMktjK1sqhzFK2jC71rKV+Vb5Ygcr+EV W9sw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=mime-version:user-agent:references:in-reply-to:message-id:date :subject:cc:to:from:arc-authentication-results; bh=c0NHVWcXy2G7eZUD1WDhDcN6x2fx6qgLe2Dy5bPQkog=; b=fF2d1gN3FC5zCm7Vf5s6lx4tGZ7aw0HJaVon+AuffqZh40WkJOOzf/i1RpyL/AK/wG rDeEbe3Gft2bzQ6SMKjKKPLffJPpWPA1li9X3N+AlNopBgilXRR/GAOMPVTDoy5O9Gqg 2UeTaFRekD2Clx7pUvoYsVAX4yIWraZLYCEZxUu9Vy/ZseincrDxagR1Bq08ApOrFwc5 YWjgQzZ8IBdyt/+If19kHT7oS493Yx3cxUUcmrA+7sdw/u9BTEbGbwco9QRPMbYQbEnD pmSKorM0NLEIVn8AjmyyFWbOt+jvbF4eemewE+TpugpH/KPMiyYcpI2cvQjF9J1Zujpn D40w== ARC-Authentication-Results: i=1; mx.google.com; spf=softfail (google.com: domain of transitioning gregkh@linuxfoundation.org does not designate 90.92.61.202 as permitted sender) smtp.mailfrom=gregkh@linuxfoundation.org Authentication-Results: mx.google.com; spf=softfail (google.com: domain of transitioning gregkh@linuxfoundation.org does not designate 90.92.61.202 as permitted sender) smtp.mailfrom=gregkh@linuxfoundation.org From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Sunil Goutham , cjacob , Aleksey Makarov , "David S. Miller" , Sasha Levin Subject: [PATCH 4.9 176/241] net: thunderx: Set max queue count taking XDP_TX into account Date: Mon, 19 Mar 2018 19:07:21 +0100 Message-Id: <20180319180758.436839994@linuxfoundation.org> X-Mailer: git-send-email 2.16.2 In-Reply-To: <20180319180751.172155436@linuxfoundation.org> References: <20180319180751.172155436@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-LABELS: =?utf-8?b?IlxcU2VudCI=?= X-GMAIL-THRID: =?utf-8?q?1595391681862439745?= X-GMAIL-MSGID: =?utf-8?q?1595391681862439745?= X-Mailing-List: linux-kernel@vger.kernel.org List-ID: 4.9-stable review patch. If anyone has any objections, please let me know. ------------------ From: Sunil Goutham [ Upstream commit 87de083857aa269fb171ef0b39696b2888361c58 ] on T81 there are only 4 cores, hence setting max queue count to 4 would leave nothing for XDP_TX. This patch fixes this by doubling max queue count in above scenarios. Signed-off-by: Sunil Goutham Signed-off-by: cjacob Signed-off-by: Aleksey Makarov Signed-off-by: David S. Miller Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- drivers/net/ethernet/cavium/thunder/nicvf_main.c | 5 +++++ 1 file changed, 5 insertions(+) --- a/drivers/net/ethernet/cavium/thunder/nicvf_main.c +++ b/drivers/net/ethernet/cavium/thunder/nicvf_main.c @@ -1576,6 +1576,11 @@ static int nicvf_probe(struct pci_dev *p nic->pdev = pdev; nic->pnicvf = nic; nic->max_queues = qcount; + /* If no of CPUs are too low, there won't be any queues left + * for XDP_TX, hence double it. + */ + if (!nic->t88) + nic->max_queues *= 2; /* MAP VF's configuration registers */ nic->reg_base = pcim_iomap(pdev, PCI_CFG_REG_BAR_NUM, 0);