Re: [PATCH] drm/i915: Add module param to test the load detect code

Jesse Barnes
2015-03-04T16:17:04Z

On 03/04/2015 12:56 AM, Chris Wilson wrote:
> On Tue, Mar 03, 2015 at 04:27:47PM -0800, Jesse Barnes wrote:
>> My "rant du jour" still is. mlock() is a good solution for some things,
>> but for the simple task of testing kernel swap out code, just running
>> that code is the most straightforward thing to do, rather than trying to
>> contort into it from userspace.
>
> Once upon a time, there was a minor request for MADV_POPULATE and
> MADV_INVALIDATE (basically wrappers around get_pages() and put_pages())
> which would give you the fuzzy feeling of testing those paths without
> actually testing the shrinker. But no use cases.

Yeah, that sounds cool, but otoh adding stable ABI just for debug is a
little scary...

Jesse