linux-kernel - Re: [PATCH v2 4/7] drm/xe: Implement cgroup for vram

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Message-ID: <Z2V9r80L2IgKdgvJ@intel.com>
Date: Fri, 20 Dec 2024 09:22:39 -0500
From: Rodrigo Vivi <rodrigo.vivi@...el.com>
To: Maxime Ripard <mripard@...nel.org>
CC: Lucas De Marchi <lucas.demarchi@...el.com>, Thomas
 Hellström <thomas.hellstrom@...ux.intel.com>, "Maarten
 Lankhorst" <dev@...khorst.se>, <linux-kernel@...r.kernel.org>,
	<intel-xe@...ts.freedesktop.org>, <dri-devel@...ts.freedesktop.org>, "Tejun
 Heo" <tj@...nel.org>, Zefan Li <lizefan.x@...edance.com>, Johannes Weiner
	<hannes@...xchg.org>, Andrew Morton <akpm@...ux-foundation.org>, "Friedrich
 Vock" <friedrich.vock@....de>, <cgroups@...r.kernel.org>,
	<linux-mm@...ck.org>, Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>
Subject: Re: [PATCH v2 4/7] drm/xe: Implement cgroup for vram

On Thu, Dec 19, 2024 at 01:03:48PM +0100, Maxime Ripard wrote:
> Hi Lucas, Thomas, Rodrigo,
> 
> We forgot to Cc you on this series, sorry. Could you have a look at it,
> and especially the following patch?

I'm sorry for the delay here.
I was following the thread on the side.
I'm glad to see that we are finally going to get some cgroups support!


Acked-by: Rodrigo Vivi <rodrigo.vivi@...el.com>

Fell free to push this through any tree...

> 
> 
> 
> On Wed, Dec 04, 2024 at 02:44:04PM +0100, Maarten Lankhorst wrote:
> > Add vram based cgroup eviction to Xe.
> > Most hardware with VRAM uses TTM for its management, and can be
> > similarly trivially enabled.
> > 
> > Co-developed-by: Maxime Ripard <mripard@...nel.org>
> > Signed-off-by: Maxime Ripard <mripard@...nel.org>
> > Signed-off-by: Maarten Lankhorst <dev@...khorst.se>
> > ---
> >  drivers/gpu/drm/xe/xe_ttm_vram_mgr.c | 8 ++++++++
> >  1 file changed, 8 insertions(+)
> > 
> > diff --git a/drivers/gpu/drm/xe/xe_ttm_vram_mgr.c b/drivers/gpu/drm/xe/xe_ttm_vram_mgr.c
> > index c95728c45ea48..f4a16e5fa7700 100644
> > --- a/drivers/gpu/drm/xe/xe_ttm_vram_mgr.c
> > +++ b/drivers/gpu/drm/xe/xe_ttm_vram_mgr.c
> > @@ -5,6 +5,7 @@
> >   */
> >  
> >  #include <drm/drm_managed.h>
> > +#include <drm/drm_drv.h>
> >  
> >  #include <drm/ttm/ttm_placement.h>
> >  #include <drm/ttm/ttm_range_manager.h>
> > @@ -311,6 +312,13 @@ int __xe_ttm_vram_mgr_init(struct xe_device *xe, struct xe_ttm_vram_mgr *mgr,
> >  	struct ttm_resource_manager *man = &mgr->manager;
> >  	int err;
> >  
> > +	if (mem_type != XE_PL_STOLEN) {
> > +		const char *name = mem_type == XE_PL_VRAM0 ? "vram0" : "vram1";
> > +		man->cg = drmm_cgroup_register_region(&xe->drm, name, size);
> > +		if (IS_ERR(man->cg))
> > +			return PTR_ERR(man->cg);
> > +	}
> > +
> >  	man->func = &xe_ttm_vram_mgr_func;
> >  	mgr->mem_type = mem_type;
> >  	mutex_init(&mgr->lock);
> > -- 
> > 2.43.0
> >