[ale] PCI kernel drivers and IO remapping

[Ed Cashin]

Well, if there was a regression in the kernel, then a good bug report could
get it fixed.

Doing a git bisect and then whittling the use case down to a more simple
form would greatly increase the chances of such a bugfix being made, in
that case.


On Fri, Apr 5, 2013 at 8:10 PM, Jim Kinney <jim.kinney at gmail.com> wrote:

> So short of a new driver that works on the new kernel, you'll need to keep
> the old kernel. I've seen older scientific hardware hidden behind layers of
> firewalls just because an upgrade would ruin it's ability to use a multi-$K
> data capture card.
>
> Welcome to the club!
>
> you did recompile that module for the new kernel?
>
>
> On Fri, Apr 5, 2013 at 7:28 PM, Alex Carver <agcarver+ale at acarver.net>wrote:
>
>> On 4/5/2013 16:17, Phil Turmel wrote:
>>
>>> On 04/05/2013 06:29 PM, Alex Carver wrote:
>>>
>>>> No virtual machines for this particular system.  There's only one OS
>>>> running directly on the hardware, we're just at a loss why the remapping
>>>> isn't working properly in one kernel version and fine in another.
>>>>
>>>
>>> Because that's a function for kernel modules to use--Linus doesn't
>>> believe in stable APIs for drivers.  They're supposed to be submitted to
>>> mainline, where they can be taken care of in public.
>>>
>>> Take a look in the kernel sources at "Documentation/stable_api_**
>>> nonsense.txt"
>>>
>>
>> Well, technically it's compiled as a module and installed using the
>> normal module tools.  The problem is that particular PCI card is
>> proprietary and so is the code so it's not something that can be released
>> to the public.
>>
>>
>> (Most of the public doesn't have this particular card, either.  At $20k a
>> pop, there aren't many of them).
>>
>>
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>
>
>
> --
> --
> James P. Kinney III
> *
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-- 
  Ed Cashin <ecashin at noserose.net>
  http://noserose.net/e/
  http://www.coraid.com/
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