netdev - Re: [PATCH net] r8169: enforce RX_MULTI

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Date:	Tue, 4 Aug 2015 22:59:10 +0200
From:	Francois Romieu <romieu@...zoreil.com>
To:	Ivan Vecera <ivecera@...hat.com>
Cc:	netdev@...r.kernel.org, alexander@...space.se, nic_swsd@...ltek.com
Subject: Re: [PATCH net] r8169: enforce RX_MULTI_EN on rtl8168ep/8111ep chips

Ivan Vecera <ivecera@...hat.com> :
> Enforcing this flag in RxConfig for the mentioned chips fixes netdev
> watchdog issues prepended with AMD IOMMU message(s) like:
> AMD-Vi: Event logged [IO_PAGE_FAULT device=01:00.0 domain=0x001d address=0x0000000000003000 flags=0x0050]

FWIW:
Acked-by: Francois Romieu <romieu@...zoreil.com>

Adding a #bz reference would be pointless:

commit 7a9810e7bd99c922d9cedf64dbaa5ef6be412295
Author: Michel Dänzer <michel@...nzer.net>
Date:   Thu Jul 17 12:55:40 2014 +0900

    r8169: Enable RX_MULTI_EN for RTL_GIGA_MAC_VER_40
    
    The ethernet port on my ASUS A88X Pro mainboard stopped working
    several times a day, with messages like these in dmesg:
    
    AMD-Vi: Event logged [IO_PAGE_FAULT device=05:00.0 domain=0x001e address=0x0
000000000003000 flags=0x0050]
[...]
commit 3ced8c955e74d319f3e3997f7169c79d524dfd06
Author: françois romieu <romieu@...zoreil.com>
Date:   Sun Sep 8 01:15:35 2013 +0200

    r8169: enforce RX_MULTI_EN for the 8168f.
    
    Same narrative as eb2dc35d99028b698cdedba4f5522bc43e576bd2 ("r8169: RxConfig
    hack for the 8168evl.") regarding AMD IOMMU errors.
    
    RTL_GIGA_MAC_VER_36 - 8168f as well - has not been reported to behave the
    same.
[...]
commit eb2dc35d99028b698cdedba4f5522bc43e576bd2
Author: françois romieu <romieu@...zoreil.com>
Date:   Wed Jun 20 12:09:18 2012 +0000

    r8169: RxConfig hack for the 8168evl.
    
    The 8168evl (RTL_GIGA_MAC_VER_34) based Gigabyte GA-990FXA motherboards
    are very prone to NETDEV watchdog problems without this change. See
    https://bugzilla.kernel.org/show_bug.cgi?id=42899 for instance.


-- 
Ueimor
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