From patchwork Thu Mar 9 13:17:01 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Thomas Hellstrom X-Patchwork-Id: 13167387 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 9B386C64EC4 for ; Thu, 9 Mar 2023 13:17:35 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 8D0B710E17B; Thu, 9 Mar 2023 13:17:31 +0000 (UTC) Received: from mga18.intel.com (mga18.intel.com [134.134.136.126]) by gabe.freedesktop.org (Postfix) with ESMTPS id F153510E80C; Thu, 9 Mar 2023 13:17:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1678367848; x=1709903848; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=GbTzUhMfzi25AYS27DoltRyE946Bi/6TFoDTOoGgsH8=; b=fj8fGTJb3IxiJx5ZeOXei6/225vMYd1dfzytv6LtIsedO1BcirEKuJV7 t8Il9TIyBqkWifugRQyDFc176UVV1ZWX4aO72NIdsNtTaabU89l9bpIFq ZTKVi5LeFoRRAvgnqe5ZuI0VphEsE2iXiLkPdNc/Zi+B0ze+UIF+zx/ah tjBq1JxHqYQiaI6WwjEVwk7Sx4fW9LJtPL51jl7GyWa/6Vlyy7SzTM37F m9K23w6MNrZ0YIX98OTL5lm5aqClfYIDgO1C/G+AoqDmthnzcY3ccIw5q wV0GUzYzdJ6Mzstly/45i0XLVLZ+5taTQBU0EkEB3EpYMP3T3kyobmjjp A==; X-IronPort-AV: E=McAfee;i="6500,9779,10643"; a="320270457" X-IronPort-AV: E=Sophos;i="5.98,246,1673942400"; d="scan'208";a="320270457" Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by orsmga106.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Mar 2023 05:17:24 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6500,9779,10643"; a="787551640" X-IronPort-AV: E=Sophos;i="5.98,246,1673942400"; d="scan'208";a="787551640" Received: from harith2x-mobl1.gar.corp.intel.com (HELO thellstr-mobl1.intel.com) ([10.249.254.196]) by fmsmga002-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Mar 2023 05:17:22 -0800 From: =?utf-8?q?Thomas_Hellstr=C3=B6m?= To: dri-devel@lists.freedesktop.org Subject: [PATCH v3 3/3] drm/ttm: Make the call to ttm_tt_populate() interruptible when faulting Date: Thu, 9 Mar 2023 14:17:01 +0100 Message-Id: <20230309131701.65312-4-thomas.hellstrom@linux.intel.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230309131701.65312-1-thomas.hellstrom@linux.intel.com> References: <20230309131701.65312-1-thomas.hellstrom@linux.intel.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: =?utf-8?q?Thomas_Hellstr=C3=B6m?= , intel-gfx@lists.freedesktop.org, Christian Koenig , Matthew Auld Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" When swapping in, or under memory pressure ttm_tt_populate() may sleep for a substantiable amount of time. Allow interrupts during the sleep. This will also allow us to inject -EINTR errors during swapin in upcoming patches. Also avoid returning VM_FAULT_OOM, since that will confuse the core mm, making it print out a confused message and retrying the fault. Return VM_FAULT_SIGBUS also under OOM conditions. Signed-off-by: Thomas Hellström --- drivers/gpu/drm/ttm/ttm_bo_vm.c | 13 ++++++++++--- 1 file changed, 10 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/ttm/ttm_bo_vm.c b/drivers/gpu/drm/ttm/ttm_bo_vm.c index ca7744b852f5..4bca6b54520a 100644 --- a/drivers/gpu/drm/ttm/ttm_bo_vm.c +++ b/drivers/gpu/drm/ttm/ttm_bo_vm.c @@ -218,14 +218,21 @@ vm_fault_t ttm_bo_vm_fault_reserved(struct vm_fault *vmf, prot = ttm_io_prot(bo, bo->resource, prot); if (!bo->resource->bus.is_iomem) { struct ttm_operation_ctx ctx = { - .interruptible = false, + .interruptible = true, .no_wait_gpu = false, .force_alloc = true }; ttm = bo->ttm; - if (ttm_tt_populate(bdev, bo->ttm, &ctx)) - return VM_FAULT_OOM; + err = ttm_tt_populate(bdev, bo->ttm, &ctx); + if (err) { + if (err == -EINTR || err == -ERESTARTSYS || + err == -EAGAIN) + return VM_FAULT_NOPAGE; + + pr_debug("TTM fault hit %pe.\n", ERR_PTR(err)); + return VM_FAULT_SIGBUS; + } } else { /* Iomem should not be marked encrypted */ prot = pgprot_decrypted(prot);