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Message-ID: <3ea6f9cbdd36c0dc17a9627c543cbea26eab635d.camel@mediatek.com> Date: Wed, 29 Oct 2025 15:01:24 +0000 From: Macpaul Lin (林智斌) <Macpaul.Lin@...iatek.com> To: "linux-mediatek@...ts.infradead.org" <linux-mediatek@...ts.infradead.org>, AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>, "Sjoerd Simons" <sjoerd@...labora.com> CC: Pablo Sun (孫毓翔) <pablo.sun@...iatek.com>, "lihongbo22@...wei.com" <lihongbo22@...wei.com>, "robh@...nel.org" <robh@...nel.org>, "kernel@...labora.com" <kernel@...labora.com>, "ulf.hansson@...aro.org" <ulf.hansson@...aro.org>, Moudy Ho (何宗原) <Moudy.Ho@...iatek.com>, "mbrugger@...e.com" <mbrugger@...e.com>, "conor+dt@...nel.org" <conor+dt@...nel.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>, "krzk+dt@...nel.org" <krzk+dt@...nel.org>, Nicolas Prado <nfraprado@...labora.com>, "macpaul@...il.com" <macpaul@...il.com>, "wenst@...omium.org" <wenst@...omium.org>, Bear Wang (萩原惟德) <bear.wang@...iatek.com>, "linux-arm-kernel@...ts.infradead.org" <linux-arm-kernel@...ts.infradead.org>, "linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>, "y.oudjana@...tonmail.com" <y.oudjana@...tonmail.com>, "matthias.bgg@...il.com" <matthias.bgg@...il.com>, MandyJH Liu (劉人僖) <MandyJH.Liu@...iatek.com> Subject: Re: [PATCH v3 04/10] pmdomain: mediatek: Refactor bus protection regmaps retrieval On Wed, 2025-10-29 at 11:56 +0100, AngeloGioacchino Del Regno wrote: > [snip] > Thanks for the logs! Getting issues on MSDC is really odd because the > MSDC > controller does *not* use nor have any power domain... > > I'll take a look at this as soon as I can, anyway. > > Thanks again, > Angelo > > > [ 1.291055] mtk-msdc 11240000.mmc: msdc_track_cmd_data: cmd=8 > > arg=000001AA; host->error=0x00000002 > > [ 1.292775] mtk-msdc 11240000.mmc: msdc_track_cmd_data: cmd=55 > > arg=00000000; host->error=0x00000002 > > [ 1.294539] mtk-msdc 11240000.mmc: msdc_track_cmd_data: cmd=55 > > arg=00000000; host->error=0x00000002 > > [ 1.296293] mtk-msdc 11240000.mmc: msdc_track_cmd_data: cmd=55 > > arg=00000000; host->error=0x00000002 > > ... > > [ 1.430408] mtk-msdc 11240000.mmc: msdc_track_cmd_data: cmd=55 > > arg=00000000; host->error=0x00000002 > > [ 1.433766] mmc0: Failed to initialize a non-removable card > > [ 22.297240] rcu: INFO: rcu_preempt detected stalls on > > CPUs/tasks: > > [ 22.298723] rcu: 6-...0: (2 ticks this GP) > > idle=104c/1/0x4000000000000000 softirq=45/45 fqs=37 > > [ 22.299827] rcu: (detected by 2, t=5256 jiffies, g=-1051, > > q=200 > > ncpus=8) > > [ 22.300689] Sending NMI from CPU 2 to CPUs 6: > > > > Best regards, > > Macpaul Lin > > The command retry only happens in the very beginning during linux boot. The following rcu_preempt and cpu/task stall are keep appearing until poewr off. It is more like cpu not responding or runtime-PM? I've not try to disable any power related kernel option yet. [22649.698912] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: [22649.699687] rcu: 5-...0: (0 ticks this GP) idle=1b7c/1/0x4000000000000000 softirq=32/32 fqs=976599 [22649.700835] rcu: (detected by 1, t=5662102 jiffies, g=-1055, q=216 ncpus=8) [22649.701728] Sending NMI from CPU 1 to CPUs 5: [22659.701734] rcu: rcu_preempt kthread starved for 2495 jiffies! g- 1055 f0x0 RCU_GP_DOING_FQS(6) ->state=0x0 ->cpu=0 [22659.703592] rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior. [22659.704746] rcu: RCU grace-period kthread stack dump: [22659.705386] task:rcu_preempt state:I stack:0 pid:15 tgid:15 ppid:2 task_flags:0x208040 flags:0x00000010 [22659.706784] Call trace: [22659.707097] __switch_to+0xf0/0x1b0 (T) [22659.707590] __schedule+0x3b0/0xca8 [22659.708039] schedule+0x3c/0x120 [22659.708453] schedule_timeout+0x8c/0x130 [22659.708956] rcu_gp_fqs_loop+0x140/0x6c0 [22659.709459] rcu_gp_kthread+0x208/0x258 [22659.709951] kthread+0x14c/0x230 [22659.710365] ret_from_fork+0x10/0x20 [22659.710824] rcu: Stack dump where RCU GP kthread last ran: [22659.711517] Sending NMI from CPU 1 to CPUs 0: [22659.712109] NMI backtrace for cpu 0 [22659.712117] CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 6.18.0- rc3-next-20251028-mtk+modified-04392-g5c921b2c5975 #1 PREEMPT [22659.712123] Hardware name: MediaTek Genio 1200 EVK-P1V2-EMMC (DT) [22659.712126] pstate: 40400009 (nZcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) [22659.712130] pc : cpuidle_enter_state+0x2bc/0x720 [22659.712137] lr : cpuidle_enter_state+0x2b8/0x720 [22659.712141] sp : ffff800084473d00 [22659.712143] x29: ffff800084473d00 x28: 0000000000000000 x27: ffff0001fef7d8c0 [22659.712151] x26: 0000000000000001 x25: 0000149be00653eb x24: 0000149be01736ef [22659.712157] x23: 0000000000000002 x22: ffff0000c2d38880 x21: 0000000000000002 [22659.712163] x20: ffff0000c2d38968 x19: ffff0001fee7e9f8 x18: 000000005bd3baae [22659.712169] x17: 000000040044ffff x16: 005000f2b5503510 x15: 0000000000000000 [22659.712175] x14: ffff800084487540 x13: ffff80017b8c8000 x12: ffff8000816f9830 [22659.712181] x11: 0000000000000000 x10: 0000000000000000 x9 : ffff8000801dc64c [22659.712187] x8 : 000000f2b5503510 x7 : 0000000000f0000f x6 : 00000000ff0ffff0 [22659.712193] x5 : ffff80017b8c8000 x4 : 0000000000000000 x3 : ffff800084473c10 [22659.712199] x2 : 000000449d287e7f x1 : ffff800084487540 x0 : 0000000000000000 [22659.712205] Call trace: [22659.712207] cpuidle_enter_state+0x2bc/0x720 (P) [22659.712212] cpuidle_enter+0x40/0x60 [22659.712219] do_idle+0x208/0x298 [22659.712226] cpu_startup_entry+0x3c/0x50 [22659.712232] rest_init+0xfc/0x120 [22659.712236] start_kernel+0x7a4/0x920 [22659.712243] __primary_switched+0x88/0x98 Regards, Macpaul Lin
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