[PATCH 4/7] drm/ttm: move LRU walk defines into new internal header

[Thomas Hellström]

Hi, Christian,

On Tue, 2024-08-20 at 17:45 +0200, Christian König wrote:
> Am 20.08.24 um 12:37 schrieb Thomas Hellström:

...

> 
> > I don't really care wether we do
> > this as an explicit loop or whether we use the LRU walker, but I
> > think
> > from a maintainability point-of-view it is better to keep LRU
> > walking
> > in a single place.
> > 
> > If we return an unlocked object, we'd need to refcount and drop the
> > lru
> > lock, but maybe that's not a bad thing.
> > 
> > But what's the main drawback of exporting the existing helper.
> 
> Well that we re-creates exactly the mid-layer mess I worked so hard
> to 
> remove from TTM.
> 
> > > > 

So could you please answer whether a solution with an iterator and a
loop macro to de-midlayer is an OK solution form your POW, or suggest
an alternative solution that you find acceptable that also allows bo
shrinking with LRU traversal similar to how it's done elsewhere in DRM?

Thanks,
Thomas