From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754673AbdLGSPe (ORCPT ); Thu, 7 Dec 2017 13:15:34 -0500 Received: from omzsmtpe02.verizonbusiness.com ([199.249.25.209]:20458 "EHLO omzsmtpe02.verizonbusiness.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754206AbdLGPqd (ORCPT ); Thu, 7 Dec 2017 10:46:33 -0500 From: alexander.levin@verizon.com Cc: Pixel Ding , Alex Deucher , alexander.levin@verizon.com X-Host: mariner.tdc.vzwcorp.com To: "linux-kernel@vger.kernel.org" , "stable@vger.kernel.org" Subject: [PATCH AUTOSEL for 4.14 010/135] drm/amdgpu: bypass lru touch for KIQ ring submission Thread-Topic: [PATCH AUTOSEL for 4.14 010/135] drm/amdgpu: bypass lru touch for KIQ ring submission Thread-Index: AQHTb3JqZ5hi5sb+MkWIYzAM11N6Qg== Date: Thu, 7 Dec 2017 15:45:32 +0000 Message-ID: <20171207154513.4154-10-alexander.levin@verizon.com> References: <20171207154513.4154-1-alexander.levin@verizon.com> In-Reply-To: <20171207154513.4154-1-alexander.levin@verizon.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-exchange-messagesentrepresentingtype: 1 x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [10.144.60.250] Content-Type: text/plain; charset="utf-8" Content-ID: <3F65656CAB3D01448DE8727868A835E6@vzwcorp.com> MIME-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from base64 to 8bit by nfs id vB7IFdON016703 From: Pixel Ding [ Upstream commit dce1e131dd4dc68099ff1b70aa03cd2d0acf8639 ] KIQ ring submission is used for register accessing on SRIOV VF that could happen both in irq enabled and irq disabled cases. Inversion lock could happen on adev->ring_lru_list_lock, while this operation is useless and just adds overhead in this use case. Signed-off-by: Pixel Ding Reviewed-by: Monk Liu Reviewed-by: Christian König Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin --- drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c index 5ce65280b396..90adff83e489 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c @@ -136,7 +136,8 @@ void amdgpu_ring_commit(struct amdgpu_ring *ring) if (ring->funcs->end_use) ring->funcs->end_use(ring); - amdgpu_ring_lru_touch(ring->adev, ring); + if (ring->funcs->type != AMDGPU_RING_TYPE_KIQ) + amdgpu_ring_lru_touch(ring->adev, ring); } /** -- 2.11.0