[Intel-gfx] [PATCH] drm/i915: Do not invalidate obj->pages under mempressure

[Sean V Kelley]

On 01/16/2015 08:05 PM, Daniel Vetter wrote:
> On Thu, Jan 15, 2015 at 08:44:00PM +0000, Chris Wilson wrote:
>> On Thu, Jan 15, 2015 at 08:36:15PM +0100, Daniel Vetter wrote:
>>> On Wed, Jan 14, 2015 at 9:34 PM, Chris Wilson
>>> <chris at chris-wilson.co.uk> wrote:
>>>> This (partially) reverts
>>>> 
>>>> commit 5537252b6b6d71fb1a8ed7395a8e5babf91953fd Author: Chris
>>>> Wilson <chris at chris-wilson.co.uk> Date:   Tue Mar 25 13:23:06
>>>> 2014 +0000
>>>> 
>>>> drm/i915: Invalidate our pages under memory pressure
>>> 
>>> Shouldn't we also revert the hunk in i915_gem_free_objects?
>>> Without the truncate vs. invalidate disdinction it seems to
>>> have lost it's reason for existence ...
>> 
>> No, setting MADV_DONTNEED has other nice properties during
>> put_pages() - I think it is useful in its own right, for example
>> that is where my page stealing code goes...
> 
> Well right now I can't make sense of this bit any more (tbh I
> didn't with the other code either, but overlooked that while
> reviewing). When it's just there for future work but atm dead code
> I prefer for it to get removed. -Daniel


So can we also revert the hunk in i915_gem_free_objects?  I would like
to get this patch merged, it looks like that is the primary concern.

Thanks,

Sean

>