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Date: Sun, 11 Jan 2015 00:19:34 +0100
From: Hans Petter Selasky <hps@selasky.org>
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To: Adrian Chadd <adrian@freebsd.org>
Subject: Re: Lynx Point USB - large amount of interrupts (300k / second)
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On 01/10/15 16:53, Adrian Chadd wrote:
> Real interrupt:
>
> frindex=0x000012f6 ctrdsegm=0x00000000 periodic=0xda3cf000 async=0xda3d1000
> port 1 status=0x00001005
> port 2 status=0x00001000
> ehci_interrupt: real interrupt
> cmd=0x00010031
>   EHCI_CMD_ITC_1
>   EHCI_CMD_ASE
>   EHCI_CMD_PSE
>   EHCI_CMD_RS
> sts=0x0000c008
>   EHCI_STS_ASS
>   EHCI_STS_PSS
>   EHCI_STS_FLR
> ien=0x00000037
>

Hi,

Can you collect some statistics how frequently the message appears, and 
which one is repeating most?

Also did you try setting:

hw.usb.ehci.iaadbug=1

hw.usb.ehci.lostintrbug=1

separately in /boot/loader.conf ?

--HPS