Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933491AbbBCKPu (ORCPT ); Tue, 3 Feb 2015 05:15:50 -0500 Received: from louise.pinerecords.com ([213.168.185.253]:51080 "EHLO louise.pinerecords.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751569AbbBCKPj (ORCPT ); Tue, 3 Feb 2015 05:15:39 -0500 X-Greylist: delayed 418 seconds by postgrey-1.27 at vger.kernel.org; Tue, 03 Feb 2015 05:15:38 EST Date: Tue, 3 Feb 2015 11:08:16 +0100 From: Tomas Szepe To: Florian Westphal , Francois Romieu , Hayes Wang , Eric Dumazet , Tom Herbert , "David S. Miller" , Marco Berizzi Cc: linux-kernel@vger.kernel.org Subject: 1e918876 breaks r8169 (linux-3.18+) Message-ID: <20150203100816.GA5807@louise.pinerecords.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1964 Lines: 43 Hi, Since linux-3.18.0, r8169 is having problems driving one of my add-on PCIe NICs. The interface is losing link for several seconds at a time, the frequency being about once a minute when the traffic is high. The first loss of link is accompanied by the message "NETDEV WATCHDOG: eth1 (r8169): transmit queue 0 timed out" and a call trace, while subsequent occurrences only report "r8169 0000:01:00.0 eth1: link up" (w/o the complementary "link down" message). I've traced the culprit down to commit 1e918876, "r8169: add support for Byte Queue Limits" by Florian Westphal . Reverting the patch appears to fix the problem on linux-3.18.5. The same issue might already have been reported by Marco Berizzi here: http://lkml.org/lkml/2014/12/11/65 The NIC is: 01:00.0 0200: 10ec:8168 (Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller) (rev 01) Subsystem: 10ec:8168 (Realtek Semiconductor Co., Ltd. RTL8111/8168 PCI Express Gigabit Ethernet controller) Flags: bus master, fast devsel, latency 0, IRQ 27 I/O ports at e000 [size=256] Memory at f7d00000 (64-bit, non-prefetchable) [size=4K] Expansion ROM at f7d20000 [disabled] [size=128K] Capabilities: [40] Power Management version 2 Capabilities: [48] Vital Product Data Capabilities: [50] MSI: Enable+ Count=1/2 Maskable- 64bit+ Capabilities: [60] Express Endpoint, MSI 00 Capabilities: [84] Vendor Specific Information: Len=4c Capabilities: [100] Advanced Error Reporting Capabilities: [12c] Virtual Channel Capabilities: [148] Device Serial Number 98-2d-00-00-10-ec-81-68 Capabilities: [154] Power Budgeting Best regards, -- Tomas Szepe -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/