r259580 breaks radeonkms

Nathan Whitehorn nwhitehorn at freebsd.org
Wed Aug 6 17:22:55 UTC 2014

On 08/06/14 09:52, Roger Pau Monné wrote:
> On 06/08/14 16:35, Nathan Whitehorn wrote:
>> On 2014-08-06 02:35, Roger Pau Monné wrote:
>>> On 06/08/14 02:37, Nathan Whitehorn wrote:
>>>> Kernels with r269580 will panic when loading the radeonkms driver in
>>>> pmap_page_set_memattr(). This probably indicates a bug in radeonkms, but
>>>> the system is unusable in the meantime.
>>>> -Nathan
>>> I seem to be able to load radeonkms just fine after r269580:
>> It's possible that it is related to actually using it, rather than
>> loading the module. I was only testing them together. I'm using vt and
>> the panic (page fault in kernel mode) occurs when TTM tries to set
>> memory attributes on some page while starting X. Before the panic, I see
>> all the normal Radeon module messages as you do, so the module seems to
>> have actually loaded correctly.  The KMS console also seems to be
>> functional enough to display the panic message, so I suspect it's X that
>> triggers it.
>> -Nathan
> Please try the attached patch, it seems to solve the panic for me. It
> also includes a fix for Intel i915 gem, which I'm not able to test
> because I don't have the hardware.
> Roger.

Works for me on radeon. Thanks!

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