From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 7D08F10ED676 for ; Fri, 27 Mar 2026 12:40:12 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 3EBE710EDCF; Fri, 27 Mar 2026 12:40:03 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="FAd8sKxR"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.15]) by gabe.freedesktop.org (Postfix) with ESMTPS id 37CCB10EC69; Fri, 27 Mar 2026 08:16:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1774599395; x=1806135395; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=VWKC7WfF9sq0UPoXI/VTX8BADLs4AZocKbls3bQOtDg=; b=FAd8sKxRYwm7HnfWA/SgyuCDWkuB9EzzO+d7m72ZMoQS/OpCHJdrZNwx wzc7FMDin9/P54UYQF2hvqAlgNE2p0kql8Z608+u6JlDuJOh0AymRRz+1 1Rq3FmszVi+jEjr978280jQlAdb8mxoJwrvFu9jq6dq/MX4O1WwqoEjxx D6Zyqmcf+oB1ynGpKd+iE3ZBt6M98Xzrc4iOuJCJzYEQJxuCQggIWtoCW vcFG3XEkrLafd3WwhavyshSgeSYU9xs5vkA3C5j5W/LpTPgkX+BW7ekpT myNAH8nqD6XSwx7fn1Aul6R+C/6dWf4ga3ZtWgpPcBQ33bs7o+kYywwT1 A==; X-CSE-ConnectionGUID: LMB/VOFESgy0AVjdxOz1Bw== X-CSE-MsgGUID: aI5VtKmSQxWP3hkOOhmxQg== X-IronPort-AV: E=McAfee;i="6800,10657,11741"; a="75784015" X-IronPort-AV: E=Sophos;i="6.23,143,1770624000"; d="scan'208";a="75784015" Received: from orviesa002.jf.intel.com ([10.64.159.142]) by fmvoesa109.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Mar 2026 01:16:34 -0700 X-CSE-ConnectionGUID: NcH4tAOxSSul0MwY0s8pQQ== X-CSE-MsgGUID: 0XW60LgxTiaGYZloM+zPAQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.23,143,1770624000"; d="scan'208";a="255747866" Received: from egrumbac-mobl6.ger.corp.intel.com (HELO fedora) ([10.245.244.146]) by orviesa002-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Mar 2026 01:16:29 -0700 From: =?UTF-8?q?Thomas=20Hellstr=C3=B6m?= To: intel-xe@lists.freedesktop.org Cc: =?UTF-8?q?Thomas=20Hellstr=C3=B6m?= , Natalie Vock , Johannes Weiner , Tejun Heo , =?UTF-8?q?Michal=20Koutn=C3=BD?= , cgroups@vger.kernel.org, Huang Rui , Matthew Brost , Matthew Auld , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , Simona Vetter , David Airlie , =?UTF-8?q?Christian=20K=C3=B6nig?= , Alex Deucher , Rodrigo Vivi , dri-devel@lists.freedesktop.org, amd-gfx@lists.freedesktop.org, linux-kernel@vger.kernel.org Subject: [PATCH 0/5] Add reclaim to the dmem cgroup controller Date: Fri, 27 Mar 2026 09:15:55 +0100 Message-ID: <20260327081600.4885-1-thomas.hellstrom@linux.intel.com> X-Mailer: git-send-email 2.53.0 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Mailman-Approved-At: Fri, 27 Mar 2026 12:40:00 +0000 X-BeenThere: amd-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Discussion list for AMD gfx List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: amd-gfx-bounces@lists.freedesktop.org Sender: "amd-gfx" When writing a "max" limit lower than the current usage, the existing code silently failed. This series aims to improve on that by returning -EBUSY on failure and also attempt to synchronously reclaim device memory to push the usage under the new max limit to avoid the error. Patch 1 implements error propagation. Patch 2 implements and documents a reclaim callback interface for the dmem controller. Patch 3 implements a TTM reclaim callback. Patch 4-5 hooks up the reclaim callback to the dmem cgroups- aware drivers xe and amdgpu. Thomas Hellström (5): cgroup/dmem: Return error when setting max below current usage cgroup/dmem: Add reclaim callback for lowering max below current usage drm/ttm: Hook up a cgroup-aware reclaim callback for the dmem controller drm/xe: Wire up dmem cgroup reclaim for VRAM manager drm/amdgpu: Wire up dmem cgroup reclaim for VRAM manager drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 2 +- drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c | 10 +- drivers/gpu/drm/ttm/ttm_bo.c | 95 ++++++++++++++++- drivers/gpu/drm/ttm/ttm_bo_util.c | 3 +- drivers/gpu/drm/ttm/ttm_resource.c | 36 +++++++ drivers/gpu/drm/xe/xe_ttm_vram_mgr.c | 19 ++-- include/drm/ttm/ttm_bo.h | 10 ++ include/drm/ttm/ttm_resource.h | 4 + include/linux/cgroup_dmem.h | 11 ++ kernel/cgroup/dmem.c | 102 ++++++++++++++++--- 10 files changed, 265 insertions(+), 27 deletions(-) -- 2.53.0