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Re: if_wm.c 1.410 sometimes hangs / sndq drops (Frank Kardel) writes:

>With -current as of 20160526T144443Z and if_wm.c 1.410
>a stuck interface is abserved on following hardware

>wm1 at pci11 dev 0 function 0: Intel i82583V (rev. 0x00)
>wm1: interrupting at ioapic0 pin 18
>wm1: PCI-Express bus
>wm1: 2048 words FLASH, version 1.10.0, Image Unique ID 0000ffff
>wm1: Ethernet address bc:5f:f4:98:32:84
>makphy0 at wm1 phy 1: Marvell 88E1149 Gigabit PHY, rev. 1

>when rsyncing. The interface is on the sending side and
>the sndq drops increase dramatically:

>net.interfaces.wm1.rcvq.drops = 0
>net.interfaces.wm1.sndq.len = 0
>net.interfaces.wm1.sndq.maxlen = 256
>net.interfaces.wm1.sndq.drops = 6077

>ifconfig down/up recover the interface.

Same here. I'm not sure if that is specific to wm but:

if_wm.c 1.400 seems to have the problem.
if_wm.c 1.391 does not.

N.B. the current version 1.410 also has some other issue as it
causes dhcpcd to behave differently. Probably something
with carrier detection. This is something not visible already
with 1.400.

                                Michael van Elst
                                "A potential Snark may lurk in every tree."

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