> On 26 Sep 2020, at 4:13 pm, Jens Axboe <axboe@xxxxxxxxx> wrote: > > On 9/26/20 5:55 AM, Christian Hewitt wrote: >>> >>> On 26 Sep 2020, at 2:51 pm, Jens Axboe <axboe@xxxxxxxxx> wrote: >>> >>> On 9/26/20 1:55 AM, Christian Hewitt wrote: >>>> I am using an ARM SBC device with Amlogic S922X chip (Beelink >>>> GS-King-X, an Android STB) to boot the Kodi mediacentre distro >>>> LibreELEC (which I work on) although the issue is also reproducible >>>> with Manjaro and Armbian on the same hardware, and with the GT-King >>>> and GT-King Pro devices from the same vendor - all three devices are >>>> using a common dtsi: >>>> >>>> https://github.com/chewitt/linux/blob/amlogic-5.9-integ/arch/arm64/boot/dts/amlogic/meson-g12b-gsking-x.dts >>>> https://github.com/chewitt/linux/blob/amlogic-5.9-integ/arch/arm64/boot/dts/amlogic/meson-g12b-gtking-pro.dts >>>> https://github.com/chewitt/linux/blob/amlogic-5.9-integ/arch/arm64/boot/dts/amlogic/meson-g12b-gtking.dts >>>> https://github.com/chewitt/linux/blob/amlogic-5.9-integ/arch/arm64/boot/dts/amlogic/meson-g12b-w400.dtsi >>>> >>>> I have schematics for the devices, but can only share those privately >>>> on request. >>>> >>>> For testing I am booting LibreELEC from SD card. The box has a 4TB >>>> SATA drive internally connected with a USB > SATA bridge, see dmesg: >>>> http://ix.io/2yLh and I connect a USB stick with a 4GB ISO file that I >>>> copy to the internal SATA drive. Within 10-20 seconds of starting the >>>> copy the box deadlocks needing a hard power cycle to recover. The >>>> timing of the deadlock is variable but the device _always_ deadlocks. >>>> Although I am using a simple copy use-case, there are similar reports >>>> in Armbian forums performing tasks like installs/updates that involve >>>> I/O loads. >>>> >>>> Following advice in the #linux-amlogic IRC channel I added >>>> CONFIG_SOFTLOCKUP_DETECTOR and CONFIG_DETECT_HUNG_TASK and was able to >>>> get output on the HDMI screen (it is not possible to connect to UART >>>> pins without destroying the box case). If you advance the following >>>> video frame by frame in VLC you can see the output: >>>> >>>> https://www.dropbox.com/s/klvcizim8cs5lze/lockup_clip.mov?dl=0 >>> >>> Try with this patch: >>> >>> https://lore.kernel.org/linux-block/20200925191902.543953-1-shakeelb@xxxxxxxxxx/ >> >> It still locks up approx. 25 seconds into the copy operation. Here’s the output in video again (a little blurry): >> >> https://www.dropbox.com/s/3j2czaq509arg6g/lockup_clip2.mov?dl=0 > > Can you try and set CONFIG_SLUB in your .config instead of CONFIG_SLAB? CONFIG_SLUB is already set, here’s the full defconfig http://paste.ubuntu.com/p/5BNdZv6J3c/ # dmesg | grep -i slub [ 0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=6, Nodes=1 > Also, just take a picture, should be easier to get readable than a video. > And the static trace is all that is needed. This is from a GT-King Pro which someone reminded me has a large RS232 port on the rear: https://pastebin.com/raw/sGtzgreN Christian
