[参考译文] PROCESSOR-SDK-AM62X：485c0100.dma-控制器崩溃问题的内核 IRQ

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https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1430952/processor-sdk-am62x-kernel-irq-of-485c0100-dma-controller-crash-issue

器件型号：PROCESSOR-SDK-AM62X

工具与软件：

您好、TI 专家

在运行 ARRECORD 时、我们观察到系统遇到以下内核 IRQ 崩溃错误消息：

[ 5637.696595] ti-udma 485c0100.dma-controller: chan2 teardown timeout!
Recording WAVE 'stdin' : Signed 16 bit Little Endian, Rate 48000 Hz, Channels 4
[ 5660.061570] rcu: INFO: rcu_preempt self-detected stall on CPU
[ 5660.061607] rcu:   0-....: (5457 ticks this GP) idle=7acc/1/0x4000000000000000 softirq=0/0 fqs=2574 rcuc=5455 jiffies(starved)
[ 5660.061623]           (t=5251 jiffies g=35081 q=283 ncpus=4)
[ 5660.061644] CPU: 0 PID: 901 Comm: irq/95-485c0100 Tainted: G           O       6.1.33-rt11-g685e771524 #1
[ 5660.061654] Hardware name: Texas Instruments AM625 SK (DT)
[ 5660.061661] pstate: 80000005 (Nzcv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
[ 5660.061669] pc : _raw_spin_unlock_irq+0x18/0x70
[ 5660.061716] lr : irq_finalize_oneshot.part.0+0x68/0x110
[ 5660.061755] sp : ffff800009b5bd90
[ 5660.061760] x29: ffff800009b5bd90 x28: 0000000000000000 x27: 0000000000000000
[ 5660.061792] x26: ffff8000080ac380 x25: ffff8000080ac5d0 x24: ffff000004397980
[ 5660.061805] x23: ffff000001344c00 x22: ffff000001344c60 x21: ffff000001344cdc
[ 5660.061816] x20: ffff000004397980 x19: ffff000001344c00 x18: 0000000000000000
[ 5660.061827] x17: 0000000000000001 x16: 0000000000000001 x15: 0000b6762e2321a2
[ 5660.061838] x14: 02da0938abd6dca0 x13: 000058fa38cd37d2 x12: 01641952b170bc26
[ 5660.061850] x11: 00000000000002ef x10: 000000000000b67e x9 : 0000000000000001
[ 5660.061861] x8 : ffff00000719cc58 x7 : ffff00000719cc68 x6 : ffffffffffffffe0
[ 5660.061871] x5 : ffff000001372680 x4 : 0000000000000000 x3 : ffffffffffffffe0
[ 5660.061883] x2 : ffff800009f00000 x1 : ffff00000719c880 x0 : 0000000100000001
[ 5660.061900] Call trace:
[ 5660.061916]  _raw_spin_unlock_irq+0x18/0x70
[ 5660.061930]  irq_forced_thread_fn+0x70/0xd0
[ 5660.061945]  irq_thread+0x178/0x23c
[ 5660.061953]  kthread+0x124/0x12c
[ 5660.061975]  ret_from_fork+0x10/0x20

操作环境：SK-AM62x EVM
SDK 版本：TI-PROCESSOR-SDK-LINUX-RT-am62xx-evm-09.00.00.03.tgz
引导方法：从 SDK 中使用 tisdk-default-image-am62xx-evm.wic.xz 创建 SD 卡以便在 EVM 上进行引导

重现内核崩溃的步骤：

1. 为简化测试条件,我们首先从 SD 卡启动后禁用了以下服务,然后重新启动。

systemctl stop irqbalanced.servic
systemctl disable irqbalanced.service
systemctl stop weston.service
systemctl disable weston.service
systemctl stop docker.service
systemctl disable docker.service
systemctl stop startwlanap.service
systemctl stop startwlansta.service
systemctl stop strongswan-starter.service
systemctl disable strongswan-starter.service
systemctl disable startwlansta.service
systemctl disable startwlanap.service
systemctl stop atd.service
systemctl disable atd.service
systemctl stop bluetooth.service
systemctl stop bt-enable.service
systemctl disable bluetooth.service
systemctl disable bt-enable.service
systemctl stop ti-apps-launcher.service
systemctl disable ti-apps-launcher.service

2.创建了音频测试文件 audio.sh、其中包含以下内容：

#!/bin/bash

while :
do
    arecord -f S16_LE -r 48000 -c 4 > /dev/null
done

3.创建了一个崩溃测试文件 test.sh、内容如下：

#!/bin/bash

modprobe -r tidss

./audio.sh &
sleep 3
memtester 256M > /dev/null &
sleep 3
memtester 256M > /dev/null &
sleep 3
memtester 256M > /dev/null &
sleep 3
memtester 256M > /dev/null &
sleep 3
memtester 256M > /dev/null &

4.执行以下命令：