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 000A7EB48EC for ; Thu, 12 Feb 2026 09:09:38 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id A674410E6FF; Thu, 12 Feb 2026 09:09:38 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="Q6nr62T/"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.13]) by gabe.freedesktop.org (Postfix) with ESMTPS id 2276410E143 for ; Thu, 12 Feb 2026 09:09:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1770887377; x=1802423377; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=WBND5bWbMPWtekFoWGepRIYNEFvtpNmjKPzBzYMGvpc=; b=Q6nr62T/6Wb/VlkSLErRuTeWl4WSqDTtZ1YxpBD47q4RaE3mJnIq5raY A/XXjg2aOngN+TjshGqzwt2bu2c/5tChkJFuHJBMANE1SzFkfQaFtmjSl 3p6JcOOCnHWjhHB9wD5GQdHpoBHt+uEBtK42GteeVGLiuniGLlAFUsitM EptVEiV9jV0n4YIwX8ZzEiVKgyEZHoKQps+KK13kby1/YgDuqFEL2IBhz c1DZfbNrE2Hu9zpnQ3MAvCU7N23WFCSYkRaSYv9Fxj8PyaOEEQfAQAG57 2y8ugag2rIdpNg/2cPxCQpBVmByadm8DFaEqtbyiTMM6gtC0Bh1FW9Yae w==; X-CSE-ConnectionGUID: Fn/516EyQ7GNe7/3sH9FZw== X-CSE-MsgGUID: 4dB7nUYERp2wpwpEbMDfMQ== X-IronPort-AV: E=McAfee;i="6800,10657,11698"; a="74653244" X-IronPort-AV: E=Sophos;i="6.21,286,1763452800"; d="scan'208";a="74653244" Received: from orviesa007.jf.intel.com ([10.64.159.147]) by fmvoesa107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 12 Feb 2026 01:09:36 -0800 X-CSE-ConnectionGUID: LNC3sk7+Rwa+pDyN7Mgdeg== X-CSE-MsgGUID: 7sGi6SGhT4SMjYMW2yObVw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.21,286,1763452800"; d="scan'208";a="212636868" Received: from varungup-desk.iind.intel.com ([10.190.238.71]) by orviesa007-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 12 Feb 2026 01:09:34 -0800 From: Arvind Yadav To: igt-dev@lists.freedesktop.org Cc: matthew.brost@intel.com, himal.prasad.ghimiray@intel.com, thomas.hellstrom@linux.intel.com, nishit.sharma@intel.com, pravalika.gurram@intel.com Subject: [PATCH i-g-t v2 0/3] tests/xe: Add purgeable memory madvise tests for system allocator Date: Thu, 12 Feb 2026 14:39:14 +0530 Message-ID: <20260212090921.2079711-1-arvind.yadav@intel.com> X-Mailer: git-send-email 2.43.0 MIME-Version: 1.0 Content-Type: text/plain; charset=yes Content-Transfer-Encoding: 8bit X-BeenThere: igt-dev@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Development mailing list for IGT GPU Tools List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: igt-dev-bounces@lists.freedesktop.org Sender: "igt-dev" This series adds IGT tests for the purgeable memory madvise functionality in the XE driver's system allocator path. Purgeable memory allows userspace to mark buffer objects as DONTNEED, making them eligible for kernel reclamation under memory pressure. This is critical for mobile and memory-constrained platforms to prevent OOM conditions while managing temporary or regeneratable GPU data. The test suite validates: - Basic purgeable lifecycle (WILLNEED -> DONTNEED -> PURGED) - "Once purged, always purged" semantics (i915 compatibility) - Per-VMA purgeable state tracking for shared buffers - CPU fault handling on purged BOs (SIGBUS/SIGSEGV) - GPU execution with purged memory and scratch page protection - Proper state transitions across multiple VMs Purgeable Memory States:- - **WILLNEED (0)**: Memory is actively needed, kernel should not reclaim it. - **DONTNEED (1)**: Application doesn't need this memory right now, kernel can reclaim it if needed Retained Value When querying purgeable state, the kernel returns: - retained = 1: Memory is still present (not purged) - retained = 0: Memory was purged/reclaimed Kernel dependency: https://patchwork.freedesktop.org/series/156651/ Test Cases : 1. madvise-purgeable-dontneed-before-mmap Purpose: Validate that mmap fails on already-purged BO 2. madvise-purgeable-dontneed-after-mmap Purpose: Validate that accessing an existing mapping of purged memory triggers SIGBUS/SIGSEGV. 3. madvise-purgeable-dontneed-before-exec Purpose: Validate GPU execution on purgeable BO (before it's used). 4. madvise-purgeable-dontneed-after-exec Purpose: Validate that previously-used BO can be purged and becomes inaccessible. 5. madvise-purgeable-per-vma-tracking Purpose: Validate per-VMA purgeable state tracking 6. madvise-purgeable-per-vma-protection Purpose: Validate that WILLNEED VMA protects BO from purging during GPU operations. v2: - Move tests from xe_exec_system_allocator.c to dedicated xe_madvise.c (Thomas Hellström). - Fix trigger_memory_pressure to use scalable overpressure (25% of VRAM, minimum 64MB instead of fixed 64MB). (Pravalika) - Add MAP_FAILED check in trigger_memory_pressure. - Touch all pages in allocated chunks, not just first 4KB. (Pravalika) - Add 100ms sleep before freeing BOs to allow shrinker time to process memory pressure. (Pravalika) - Rename 'bo2' to 'handle' for clarity in trigger_memory_pressure.(Pravalika) - Add NEEDS_VISIBLE_VRAM flag to purgeable_setup_simple_bo for consistent CPU mapping support on discrete GPUs. (Pravalika) - Add proper NULL mmap handling in test_dontneed_before_mmap with cleanup and early return. (Pravalika) Arvind Yadav (2): lib/xe: Add purgeable memory ioctl support tests/intel/xe_madvise: Add purgeable BO madvise tests Himal Prasad Ghimiray (1): drm-uapi/xe_drm: Add UAPI support for purgeable buffer objects include/drm-uapi/xe_drm.h | 44 +++ lib/xe/xe_ioctl.c | 33 ++ lib/xe/xe_ioctl.h | 2 + tests/intel/xe_madvise.c | 747 ++++++++++++++++++++++++++++++++++++++ tests/meson.build | 1 + 5 files changed, 827 insertions(+) create mode 100644 tests/intel/xe_madvise.c -- 2.43.0