From owner-freebsd-usb@FreeBSD.ORG  Tue Aug 14 15:01:17 2007
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From: Hans Petter Selasky <hselasky@c2i.net>
To: freebsd-usb@freebsd.org,
 Khairil Yusof <kaeru@inigo-tech.com>
Date: Tue, 14 Aug 2007 17:01:24 +0200
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Subject: Re: usb/105186: USB 2.0/ehci on FreeBSD 6.2-PRE/AMD64 crashes box
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On Tuesday 14 August 2007, Khairil Yusof wrote:
> The following reply was made to PR usb/105186; it has been noted by GNATS.
>
> From: Khairil Yusof <kaeru@inigo-tech.com>
> To: bug-followup@FreeBSD.org, ohartman@zedat.fu-berlin.de
> Cc:
> Subject: Re: usb/105186: USB 2.0/ehci on FreeBSD 6.2-PRE/AMD64 crashes box
> Date: Tue, 14 Aug 2007 10:20:36 +0800
>
>  I tried it with the new usb driver. More concerned with stability.
>
>
>          RELEASE 6.2 AMD64
>
>          - stock ehci driver, it will just reboot.
>          - stock ohci driver, more stable, but eventually under heavy IO
>          it will crash and reboot.
>          - usb4bsd ohci driver + atausb, stable, no errors.
>          - usb4bsd ehci driver + umass, it will hang
>          - usb4bsd ehci driver + atausb, it will hang, but recover after
>          g_vfs
>          timeout
>
>          The following are the results of usb4bsd ehci driver + atausb
>          when it
>          hangs:

Hi,

You can turn on more debugging in "umass" by:

sysctl hw.usb.umass.debug=-1

With /usr/src/sys/dev/ata/ata-usb.c:

Change the following variable manually to "5".

static const int atausbdebug = 0;

Then recompile the atausb module or kernel.

When it hangs the debug output is of interest.

--HPS