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[73.37.105.206]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-39d98a58d23sm12533511a91.2.2026.09.12.07.59.25 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 12 Sep 2026 07:59:26 -0700 (PDT) From: Rob Clark To: dri-devel@lists.freedesktop.org Cc: freedreno@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, Rob Clark , Dmitry Baryshkov , Abhinav Kumar , Jessica Zhang , Sean Paul , Marijn Suijten , David Airlie , Simona Vetter , linux-kernel@vger.kernel.org (open list) Subject: [PATCH v2 2/2] drm/msm/gem: Add modparam to disable shrinker blocking Date: Sat, 12 Sep 2026 07:59:22 -0700 Message-ID: <20260912145922.24115-2-robin.clark@oss.qualcomm.com> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260912145922.24115-1-robin.clark@oss.qualcomm.com> References: <20260912145922.24115-1-robin.clark@oss.qualcomm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Proofpoint-GUID: xunrkXDapP6Z_sqII1mppzBpagDq6i6p X-Proofpoint-ORIG-GUID: xunrkXDapP6Z_sqII1mppzBpagDq6i6p X-Authority-Analysis: v=2.4 cv=NelzRGD4 c=1 sm=1 tr=0 ts=6aa568cf cx=c_pps a=vVfyC5vLCtgYJKYeQD43oA==:117 a=19Wyn7e3V/0aNffMjNCMQw==:17 a=VdqzKS8jKosA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=3WHJM1ZQz_JShphwDgj5:22 a=EUspDBNiAAAA:8 a=RQ8Jhd0wILkaI2gFI60A:9 a=rl5im9kqc5Lf4LNbBjHf:22 X-Proofpoint-Spam-Info: AW1haW4tMjYwOTEyMDIxNyBTYWx0ZWRfX2F+Pyfw8G0y/ Odjxtpd8E8oZTojMvlRfUzkRaDHSpKMx0W1fDgtk6gdZrWtVbzOkFN7fIQYdiPLzI051PB6We/Q 91DcMkjbMDPr5tEEedTmrOoBh5t8dWE= X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwOTEyMDIxNyBTYWx0ZWRfX0IsL4VYG3fJr obUYyh5r1A4+PcOXzHbmuR8OVidsuRx+wWkmX9Kdu1RTfWcKvRxq1mzQwIHW9uTH8LwkHXjrTZQ lkrScP6GjegHXIMA33/9lZx06L3bKWX6U0L7tD3TaUUJe8ZZJYl2MyzCD7+9K9CcaQ3vfVzy+WP 2/fs3O0+A/zCTsmNNGfmPnkAAxJpO3kjg7C2aC2DQnIeV5RG05IJ5m1edWQ1ITNet9hGXnrtq5t qUYS7XvWP94qo1GVt7Gl9y8GXzDKafLdjUkZXa/lSaC3CYqRaPjfU/wsAjSC1cpLPMepa7CXxxw GEGQsMDNLKQxxhfJ5t0ieVl3UoAssnjk7gNlDYorVIlnxVLfZPe6KBKz38fHHdTaSt6CZS50Sqr ADWit5zkoHCzcv5vBdujTYPsp+uM63hMgX3SgbpSppGbxPwjkn1cdtJhlENu1CsA+b8KYl8qvJI WAxGgbaufXpLyyIZT2g== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-09-12_05,2026-09-11_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 adultscore=0 impostorscore=0 priorityscore=1501 clxscore=1015 spamscore=0 malwarescore=0 suspectscore=0 lowpriorityscore=0 phishscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2609040000 definitions=main-2609120217 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: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Normally if we are under enough memory pressure, the shrinker will eventually start waiting for BOs to become idle. In some very latency sensitive use-cases this is undesirable. Signed-off-by: Rob Clark --- drivers/gpu/drm/msm/msm_gem_shrinker.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/gpu/drm/msm/msm_gem_shrinker.c b/drivers/gpu/drm/msm/msm_gem_shrinker.c index 3514d5c84989..83ee032cb21d 100644 --- a/drivers/gpu/drm/msm/msm_gem_shrinker.c +++ b/drivers/gpu/drm/msm/msm_gem_shrinker.c @@ -19,6 +19,10 @@ static bool enable_eviction = true; MODULE_PARM_DESC(enable_eviction, "Enable swappable GEM buffers"); module_param(enable_eviction, bool, 0600); +static bool eviction_can_block = true; +MODULE_PARM_DESC(eviction_can_block, "Enable blocking for GEM buffer to become idle for eviction"); +module_param(eviction_can_block, bool, 0600); + static bool can_swap(void) { return enable_eviction && get_nr_swap_pages() > 0; @@ -26,6 +30,8 @@ static bool can_swap(void) static bool can_block(struct shrink_control *sc) { + if (!eviction_can_block) + return false; return (sc->gfp_mask & __GFP_DIRECT_RECLAIM) || (current_is_kswapd() && (sc->gfp_mask & __GFP_KSWAPD_RECLAIM)); } -- 2.55.0