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X-CSE-ConnectionGUID: f/GRv2y4QsibS2dhw9iSgg== X-CSE-MsgGUID: mmHgvJnJT0y9pjHlTx3pAA== X-IronPort-AV: E=McAfee;i="6800,10657,11769"; a="89654107" X-IronPort-AV: E=Sophos;i="6.23,203,1770624000"; d="scan'208";a="89654107" Received: from fmviesa002.fm.intel.com ([10.60.135.142]) by fmvoesa104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 28 Apr 2026 03:02:40 -0700 X-CSE-ConnectionGUID: 0QLQBZ8kQU2MR6y1L+2CLQ== X-CSE-MsgGUID: zz6QLTN/RV2NA1bgXxOy0A== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.23,203,1770624000"; d="scan'208";a="257222117" Received: from abityuts-desk.ger.corp.intel.com (HELO [10.245.245.33]) ([10.245.245.33]) by fmviesa002-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 28 Apr 2026 03:02:36 -0700 Message-ID: <5d36326b1b9c009cd544fe5ca195ae484dbbc915.camel@linux.intel.com> Subject: Re: [PATCH v2 3/4] drm/xe: Wire up dmem cgroup reclaim for VRAM manager From: Thomas =?ISO-8859-1?Q?Hellstr=F6m?= To: Maarten Lankhorst , intel-xe@lists.freedesktop.org Cc: Natalie Vock , Johannes Weiner , Tejun Heo , Michal =?ISO-8859-1?Q?Koutn=FD?= , cgroups@vger.kernel.org, Huang Rui , Matthew Brost , Matthew Auld , Maxime Ripard , Thomas Zimmermann , Simona Vetter , David Airlie , Christian =?ISO-8859-1?Q?K=F6nig?= , Alex Deucher , Rodrigo Vivi , dri-devel@lists.freedesktop.org, amd-gfx@lists.freedesktop.org, linux-kernel@vger.kernel.org Date: Tue, 28 Apr 2026 12:02:31 +0200 In-Reply-To: <84473cbe-79ad-421e-8c8a-171e5784105f@linux.intel.com> References: <20260428073116.15687-1-thomas.hellstrom@linux.intel.com> <20260428073116.15687-4-thomas.hellstrom@linux.intel.com> <84473cbe-79ad-421e-8c8a-171e5784105f@linux.intel.com> Organization: Intel Sweden AB, Registration Number: 556189-6027 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.58.3 (3.58.3-1.fc43) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 On Tue, 2026-04-28 at 11:50 +0200, Maarten Lankhorst wrote: >=20 >=20 > Den 2026-04-28 kl. 09:31, skrev Thomas Hellstr=C3=B6m: > > Register the VRAM manager with the dmem cgroup reclaim > > infrastructure > > so that lowering dmem.max below current VRAM usage triggers TTM > > eviction rather than failing with -EBUSY. > >=20 > > Assisted-by: GitHub Copilot:claude-sonnet-4.6 > > Signed-off-by: Thomas Hellstr=C3=B6m > > --- > > =C2=A0drivers/gpu/drm/xe/xe_ttm_vram_mgr.c | 19 ++++++++++++------- > > =C2=A01 file changed, 12 insertions(+), 7 deletions(-) > >=20 > > diff --git a/drivers/gpu/drm/xe/xe_ttm_vram_mgr.c > > b/drivers/gpu/drm/xe/xe_ttm_vram_mgr.c > > index 5fd0d5506a7e..1bdcb3fee901 100644 > > --- a/drivers/gpu/drm/xe/xe_ttm_vram_mgr.c > > +++ b/drivers/gpu/drm/xe/xe_ttm_vram_mgr.c > > @@ -303,13 +303,6 @@ int __xe_ttm_vram_mgr_init(struct xe_device > > *xe, struct xe_ttm_vram_mgr *mgr, > > =C2=A0 struct ttm_resource_manager *man =3D &mgr->manager; > > =C2=A0 int err; > > =C2=A0 > > - if (mem_type !=3D XE_PL_STOLEN) { > > - const char *name =3D mem_type =3D=3D XE_PL_VRAM0 ? > > "vram0" : "vram1"; > > - man->cg =3D drmm_cgroup_register_region(&xe->drm, > > name, size); > > - if (IS_ERR(man->cg)) > > - return PTR_ERR(man->cg); > > - } > > - > > =C2=A0 man->func =3D &xe_ttm_vram_mgr_func; > > =C2=A0 mgr->mem_type =3D mem_type; > > =C2=A0 mutex_init(&mgr->lock); > > @@ -318,6 +311,18 @@ int __xe_ttm_vram_mgr_init(struct xe_device > > *xe, struct xe_ttm_vram_mgr *mgr, > > =C2=A0 mgr->visible_avail =3D io_size; > > =C2=A0 > > =C2=A0 ttm_resource_manager_init(man, &xe->ttm, size); > > + > > + if (mem_type !=3D XE_PL_STOLEN) { > > + const char *name =3D mem_type =3D=3D XE_PL_VRAM0 ? > > "vram0" : "vram1"; > > + struct dmem_cgroup_region *cg =3D > > + drmm_cgroup_register_region(&xe->drm, > > name, size); > > + > > + if (IS_ERR(cg)) > > + return PTR_ERR(cg); > > + > > + ttm_resource_manager_set_dmem_region(man, cg); > > + } > > + > > =C2=A0 err =3D gpu_buddy_init(&mgr->mm, man->size, > > default_page_size); > > =C2=A0 if (err) > > =C2=A0 return err; >=20 > This patch will conflict with=20 > https://patchwork.freedesktop.org/series/164694/=C2=A0which removes > stolen support, can we merge that patch first while we wait for AMD > acks? Sure, np. >=20 > Do I need an ack to get the series through drm-misc? Which series? The stolen support or this cgroup series? Thanks, Thomas >=20 > Kind regards, > ~Maarten Lankhorst