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 D33F8E83848 for ; Tue, 17 Feb 2026 02:35:48 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 5E5C110E1CC; Tue, 17 Feb 2026 02:35:48 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="T9d9lu4K"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.17]) by gabe.freedesktop.org (Postfix) with ESMTPS id BB8EC10E15A for ; Tue, 17 Feb 2026 02:35:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1771295747; x=1802831747; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=7Bo5zqarZBDXr4218yfxTZzEm1fCkgd2a/ZLje42ZTc=; b=T9d9lu4KF7lNZS128tb/0IU2kxzD7DcI8wyv7CNFQ/QUzQEEEfaylvkq YaDwZnrWTJ86Bi7a1GgTN9eFG19sYM7XDLafQFRbhTUeiYeeO24dfDQDL UVE3rH39I5N6Yz34HYzmq4dzlFykGx6twP9Ep7rm5ooPdoceoVr9ez9qk XBic5vDeM7DIjkrG6SOcWBtziWx0GreMqSQ9lXqhKPkUsrf2DH9no8anZ KmqGLpssOsQI3DG5B1EBerPP1rVaR87ZUcgR52KEx3wBXDe7wjdL47TWd v+2I8GuigwnyMRYTqy6TlC+knGnCHUiuiRBNJYaAdRgzT7AW/c6GbwEIl w==; X-CSE-ConnectionGUID: MPDRraQ6Qn+Zx72CYqhpiQ== X-CSE-MsgGUID: 2FGZZG+FS6OvBoLm0wed6Q== X-IronPort-AV: E=McAfee;i="6800,10657,11703"; a="72358373" X-IronPort-AV: E=Sophos;i="6.21,295,1763452800"; d="scan'208";a="72358373" Received: from fmviesa003.fm.intel.com ([10.60.135.143]) by orvoesa109.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 16 Feb 2026 18:35:46 -0800 X-CSE-ConnectionGUID: FN9p2tZFT02ZG2SwNwMgmA== X-CSE-MsgGUID: BAo0d+IkSvKHvPp/rFnFwQ== X-ExtLoop1: 1 Received: from varungup-desk.iind.intel.com ([10.190.238.71]) by fmviesa003-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 16 Feb 2026 18:34:32 -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 v3 0/8] tests/xe: Add purgeable memory madvise tests for system allocator Date: Tue, 17 Feb 2026 08:04:11 +0530 Message-ID: <20260217023423.2632617-1-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) v3: - Added separate commits for each individual test case. (Pravalika) Arvind Yadav (7): lib/xe: Add purgeable memory ioctl support tests/intel/xe_madvise: Add dontneed-before-mmap subtest tests/intel/xe_madvise: Add dontneed-after-mmap subtest tests/intel/xe_madvise: Add dontneed-before-exec subtest tests/intel/xe_madvise: Add dontneed-after-exec subtest tests/intel/xe_madvise: Add per-vma-tracking subtest tests/intel/xe_madvise: Add per-vma-protection subtest 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 | 731 ++++++++++++++++++++++++++++++++++++++ tests/meson.build | 1 + 5 files changed, 811 insertions(+) create mode 100644 tests/intel/xe_madvise.c -- 2.43.0