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 <f...@strlen.de>. 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 <sz...@pinerecords.com> -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
