From: Jens Axboe <axboe@kernel.dk>
To: Christian Hewitt <christianshewitt@gmail.com>,
linux-block@vger.kernel.org, linux-usb@vger.kernel.org,
linux-amlogic@lists.infradead.org
Cc: furkan@fkardame.com, Brad Harper <bjharper@gmail.com>
Subject: Re: Deadlock under load with Linux 5.9 and other recent kernels
Date: Sat, 26 Sep 2020 04:51:40 -0600 [thread overview]
Message-ID: <4a51f6d8-486b-73ee-0585-f2154aa90a83@kernel.dk> (raw)
In-Reply-To: <5878AC01-8A1B-4F39-B4BD-BDDEFAECFAA2@gmail.com>
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@google.com/
--
Jens Axboe
next prev parent reply other threads:[~2020-09-26 10:51 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-26 7:55 Deadlock under load with Linux 5.9 and other recent kernels Christian Hewitt
2020-09-26 10:51 ` Jens Axboe [this message]
2020-09-26 11:55 ` Christian Hewitt
2020-09-26 12:13 ` Jens Axboe
2020-09-26 12:28 ` Christian Hewitt
2020-09-28 1:37 ` Christian Hewitt
2020-09-28 11:06 ` Patrik Nilsson
2020-09-28 13:36 ` Christian Hewitt
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