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[73.37.105.206]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-39b08ca63b3sm6620095a91.11.2026.09.03.11.37.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 03 Sep 2026 11:37:32 -0700 (PDT) From: Rob Clark To: dri-devel@lists.freedesktop.org Cc: linux-arm-msm@vger.kernel.org, freedreno@lists.freedesktop.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 2/2] drm/msm/gem: Add modparam to disable shrinker blocking Date: Thu, 3 Sep 2026 11:37:25 -0700 Message-ID: <20260903183725.15835-2-robin.clark@oss.qualcomm.com> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260903183725.15835-1-robin.clark@oss.qualcomm.com> References: <20260903183725.15835-1-robin.clark@oss.qualcomm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Proofpoint-GUID: RobTrNO6hcG4dYooC21ytjYgBBZ_OrVT X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwOTAzMDE2MyBTYWx0ZWRfX/QhvCmV9WpXM eXZaHRDh33ywU00YVmHW2f3NiCd36i+e06dfaCwkzNvXmzimzxyQf56HTog2AG3eje1lT6Opp+B g1QC32pCII6QQS2ePZBTnqB7GDw9oI9Q1wrWLNb0CkWkBSBNrMqND1/5VFo6BEnzDk4FOg1pzOX h0UFQP03Oedn8HkFpPt3slNOa9zzzgzK2zbFmB1OxObODO++FJE5TVYeK8BqsWiXB+Taq9Ozp1P dgUQxAOAq/sfp17nGxgs4xozud8CLTaatS0M7m+WfU+0CZeSwAXwS8ZbDNE1oHImlbDkpY0eDXE odcyBR9r9S0+rQ6Gx3Qo7XtCbeT04tuAwc5CsN1xhCXKYuIPByTXIAczkMgqWdDwuaJKJjUTe/K F6Ap9x3G3qXO2LnUmSOG3nLTOyg9SMRJnamwYfSPSQ1hy7hogVDCzzuYVW/jIWx6bymFSNifqI+ x4fG/aQN3KDhI2mRxew== X-Authority-Analysis: v=2.4 cv=X8Ji7mTe c=1 sm=1 tr=0 ts=6a99be6d cx=c_pps a=0uOsjrqzRL749jD1oC5vDA==:117 a=19Wyn7e3V/0aNffMjNCMQw==:17 a=VdqzKS8jKosA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=_K5XuSEh1TEqbUxoQ0s3:22 a=EUspDBNiAAAA:8 a=RQ8Jhd0wILkaI2gFI60A:9 a=mQ_c8vxmzFEMiUWkPHU9:22 X-Proofpoint-Spam-Info: AW1haW4tMjYwOTAzMDE2MyBTYWx0ZWRfXyLS2CQfEkwdL vllclKXolJz+E4f7mM2lLeAE5m4eM7x9pyU6RiqIEgXLPUwC1oR8b2fBdRzeArCKm0gSG3aL078 Pr2a6Ydw07k9013/ECYuXbE7EWyZjUk= X-Proofpoint-ORIG-GUID: RobTrNO6hcG4dYooC21ytjYgBBZ_OrVT 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=2026-09-03_05,2026-09-03_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 spamscore=0 phishscore=0 lowpriorityscore=0 impostorscore=0 priorityscore=1501 adultscore=0 bulkscore=0 clxscore=1015 suspectscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2609030163 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