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Thu, 2 Jul 2020 08:27:42 +0000 Subject: Re: [PATCH v2] gpu/drm: Remove debug info about CPU address To: Tiezhu Yang , alexander.deucher@amd.com Cc: amd-gfx@lists.freedesktop.org, linux-kernel@vger.kernel.org References: <1593656863-1894-1-git-send-email-yangtiezhu@loongson.cn> From: =?UTF-8?Q?Christian_K=c3=b6nig?= Message-ID: <85c81fa9-2994-d861-0690-a79600ed84b3@amd.com> Date: Thu, 2 Jul 2020 10:27:36 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.9.0 In-Reply-To: <1593656863-1894-1-git-send-email-yangtiezhu@loongson.cn> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit Content-Language: en-US X-ClientProxiedBy: AM0PR02CA0003.eurprd02.prod.outlook.com (2603:10a6:208:3e::16) To MN2PR12MB3775.namprd12.prod.outlook.com (2603:10b6:208:159::19) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from [IPv6:2a02:908:1252:fb60:be8a:bd56:1f94:86e7] (2a02:908:1252:fb60:be8a:bd56:1f94:86e7) by AM0PR02CA0003.eurprd02.prod.outlook.com (2603:10a6:208:3e::16) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3153.20 via Frontend Transport; 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X-MS-Exchange-AntiSpam-MessageData: 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 X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-Network-Message-Id: 92c488c9-fa4b-4491-db1e-08d81e61c953 X-MS-Exchange-CrossTenant-AuthSource: MN2PR12MB3775.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 02 Jul 2020 08:27:41.9097 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: JuSeSsRqmsD/koA1hC3ZRo/LTQRPYoobCYM+eJH3WjYRWA3h0s+fnUm7EdHj8MM5 X-MS-Exchange-Transport-CrossTenantHeadersStamped: MN2PR12MB4110 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Am 02.07.20 um 04:27 schrieb Tiezhu Yang: > When I update the latest kernel, I see the following "____ptrval____" boot > messages. > > [ 1.872600] radeon 0000:01:05.0: fence driver on ring 0 use gpu addr 0x0000000048000c00 and cpu addr 0x(____ptrval____) > [ 1.879095] radeon 0000:01:05.0: fence driver on ring 5 use gpu addr 0x0000000040056038 and cpu addr 0x(____ptrval____) > > Both radeon_fence_driver_start_ring() and amdgpu_fence_driver_start_ring() > have the similar issue, there exists the following two methods to solve it: > (1) Use "%pK" instead of "%p" so that the CPU address can be printed when > the kptr_restrict sysctl is set to 1. > (2) Just completely drop the CPU address suggested by Christian, because > the CPU address was useful in the past, but isn't any more. We now have a > debugfs file to read the current fence values. > > Since the CPU address is not much useful, just remove the debug info about > CPU address. > > Signed-off-by: Tiezhu Yang Splitting it into one patch for radeon and one for amdgpu might be nice to have. But either way Reviewed-by: Christian König for the patch. Thanks, Christian. > --- > > v2: > - Just remove the debug info about CPU address suggested by Christian > - Modify the patch subject and update the commit message > > drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c | 5 ++--- > drivers/gpu/drm/radeon/radeon_fence.c | 4 ++-- > 2 files changed, 4 insertions(+), 5 deletions(-) > > diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c > index d878fe7..a29f2f9 100644 > --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c > +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c > @@ -422,9 +422,8 @@ int amdgpu_fence_driver_start_ring(struct amdgpu_ring *ring, > ring->fence_drv.irq_type = irq_type; > ring->fence_drv.initialized = true; > > - DRM_DEV_DEBUG(adev->dev, "fence driver on ring %s use gpu addr " > - "0x%016llx, cpu addr 0x%p\n", ring->name, > - ring->fence_drv.gpu_addr, ring->fence_drv.cpu_addr); > + DRM_DEV_DEBUG(adev->dev, "fence driver on ring %s use gpu addr 0x%016llx\n", > + ring->name, ring->fence_drv.gpu_addr); > return 0; > } > > diff --git a/drivers/gpu/drm/radeon/radeon_fence.c b/drivers/gpu/drm/radeon/radeon_fence.c > index 43f2f93..8735bf2 100644 > --- a/drivers/gpu/drm/radeon/radeon_fence.c > +++ b/drivers/gpu/drm/radeon/radeon_fence.c > @@ -865,8 +865,8 @@ int radeon_fence_driver_start_ring(struct radeon_device *rdev, int ring) > } > radeon_fence_write(rdev, atomic64_read(&rdev->fence_drv[ring].last_seq), ring); > rdev->fence_drv[ring].initialized = true; > - dev_info(rdev->dev, "fence driver on ring %d use gpu addr 0x%016llx and cpu addr 0x%p\n", > - ring, rdev->fence_drv[ring].gpu_addr, rdev->fence_drv[ring].cpu_addr); > + dev_info(rdev->dev, "fence driver on ring %d use gpu addr 0x%016llx\n", > + ring, rdev->fence_drv[ring].gpu_addr); > return 0; > } > 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 X-Spam-Level: X-Spam-Status: No, score=-8.3 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, MSGID_FROM_MTA_HEADER,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 83B11C433DF for ; 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Thu, 2 Jul 2020 08:27:42 +0000 Subject: Re: [PATCH v2] gpu/drm: Remove debug info about CPU address To: Tiezhu Yang , alexander.deucher@amd.com References: <1593656863-1894-1-git-send-email-yangtiezhu@loongson.cn> From: =?UTF-8?Q?Christian_K=c3=b6nig?= Message-ID: <85c81fa9-2994-d861-0690-a79600ed84b3@amd.com> Date: Thu, 2 Jul 2020 10:27:36 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.9.0 In-Reply-To: <1593656863-1894-1-git-send-email-yangtiezhu@loongson.cn> Content-Language: en-US X-ClientProxiedBy: AM0PR02CA0003.eurprd02.prod.outlook.com (2603:10a6:208:3e::16) To MN2PR12MB3775.namprd12.prod.outlook.com (2603:10b6:208:159::19) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from [IPv6:2a02:908:1252:fb60:be8a:bd56:1f94:86e7] (2a02:908:1252:fb60:be8a:bd56:1f94:86e7) by AM0PR02CA0003.eurprd02.prod.outlook.com (2603:10a6:208:3e::16) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3153.20 via Frontend Transport; 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