From patchwork Wed Feb 15 16:14:02 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Thomas Hellstrom X-Patchwork-Id: 13141918 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 97AEDC636CC for ; Wed, 15 Feb 2023 16:16:08 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 0628D10EB2F; Wed, 15 Feb 2023 16:15:53 +0000 (UTC) Received: from mga06.intel.com (mga06b.intel.com [134.134.136.31]) by gabe.freedesktop.org (Postfix) with ESMTPS id 3AE8010EB14; Wed, 15 Feb 2023 16:15:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1676477746; x=1708013746; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=zt1DKEeSn7xRuS1yXMlaTraoBCdZSI/zSbCQL3fb6rc=; b=e5MetwQttMSnG+a0Xv3t5z1jCwN1J4LnMZeLADkWaxj2j81ftRy8hbMC hXOif9VfO94wbcALNqyCuQ5Byo92CRwl0/ym0v5ERSyrtx3CzSLV2r1JM PDgXvXZD0qVS+xyu91idqxYfj4vvfjiyUtrePXfYBIztv8nMFyKv8B7zx Xp4XQ24mHq1kccbOkDVI9KCrvB8N4H77kVr0YlWE/2Za1d/jXUXI6JbMU mkMwmuT+4SB5OjtF5m0gdMWLe97EbZ2qDwwwQxGq1wfTH9bv73IuYaHuZ /+Qpw4lj8WhOrKiu7CtlGJmS58KOa9jsMd7x61WcMzrxXkDgt0yrSDvCz w==; X-IronPort-AV: E=McAfee;i="6500,9779,10622"; a="393871107" X-IronPort-AV: E=Sophos;i="5.97,300,1669104000"; d="scan'208";a="393871107" Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 15 Feb 2023 08:15:38 -0800 X-IronPort-AV: E=McAfee;i="6500,9779,10622"; a="758472708" X-IronPort-AV: E=Sophos;i="5.97,300,1669104000"; d="scan'208";a="758472708" Received: from auliel-mobl1.ger.corp.intel.com (HELO thellstr-mobl1.intel.com) ([10.249.254.14]) by fmsmga003-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 15 Feb 2023 08:15:30 -0800 From: =?utf-8?q?Thomas_Hellstr=C3=B6m?= To: dri-devel@lists.freedesktop.org Date: Wed, 15 Feb 2023 17:14:02 +0100 Message-Id: <20230215161405.187368-14-thomas.hellstrom@linux.intel.com> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20230215161405.187368-1-thomas.hellstrom@linux.intel.com> References: <20230215161405.187368-1-thomas.hellstrom@linux.intel.com> MIME-Version: 1.0 Subject: [Intel-gfx] [RFC PATCH 13/16] drm/ttm: Make the call to ttm_tt_populate() interruptible when faulting X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Miaohe Lin , =?utf-8?q?Thomas_Hellstr=C3=B6m?= , David Hildenbrand , NeilBrown , Daniel Vetter , intel-gfx@lists.freedesktop.org, "Matthew Wilcox \(Oracle\)" , linux-mm@kvack.org, Dave Hansen , linux-graphics-maintainer@vmware.com, Peter Xu , Johannes Weiner , Dave Airlie , Andrew Morton , Christian Koenig , Matthew Auld Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" 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 3ecda6db24b8..80f106bfe385 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);