Hi Krzysztof,
On 2017-12-08 13:33, Krzysztof Kozlowski wrote:
On Fri, Dec 8, 2017 at 1:27 PM, Mark Brown <broonie@xxxxxxxxxx> wrote:
On Fri, Dec 08, 2017 at 12:20:07PM +0000, Mark Brown wrote:
On Thu, Dec 07, 2017 at 03:54:47PM -0800, kernelci.org bot wrote:
Today's -next failed to boot on peach-pi:
exynos_defconfig:
exynos5800-peach-pi:
lab-collabora: new failure (last pass: next-20171205)
with details at https://kernelci.org/boot/id/5a2a2e7859b5141bc2afa17c/
(including logs and comparisons with other boots, the last good boot was
Wednesday). It looks like it hangs somewhere late on in boot, the last
output on the console is:
[ 4.827139] smsc95xx 3-1.1:1.0 eth0: register 'smsc95xx' at usb-xhci-hcd.3.auto-1.1, smsc95xx USB 2.0 Ethernet, 94:eb:2c:00:03:c0
[ 5.781037] dma-pl330 3880000.adma: Loaded driver for PL330 DMAC-241330
[ 5.786247] dma-pl330 3880000.adma: DBUFF-4x8bytes Num_Chans-6 Num_Peri-16 Num_Events-6
[ 5.819200] dma-pl330 3880000.adma: PM domain MAU will not be powered off
[ 64.529228] random: crng init done
and there's failures earlier to instantiate the display.
I just noticed that further up the log there's a lockdep splat with a
conflict between the genpd and clock API locking - an ABBA issue with
genpd->mlock and the clock API prepare_lock.
+Cc Marek Szyprowski,
The lockdep issue and display failures (including regulator warning)
were present for some time. They also appear in boot log for
next-20171206 (https://storage.kernelci.org/next/master/next-20171206/arm/exynos_defconfig/lab-collabora/boot-exynos5800-peach-pi.html).
The difference is that 20171208 hangs on "random: crng init done"
which did not appear before at all.
"random: crng init done" happens about a minute after boot, so if board
boots correctly to system prompt before that time, there will be no such
message.
The only recent changes in samsung-soc tree which could affect Exynos5800 is
- ARM: dts: exynos: Add audio power domain support to Exynos542x SoCs
https://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux.git/commit/?h=next/dt&id=528832d4c01a2b400775df95fe8d363cf4c5230f
- ARM: dts: exynos: Add CPU perf counters to Exynos54xx boards
https://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux.git/commit/?h=next/dt&id=c4f2fc00defc65950dfabce7a4c70cd2a289111d
But both of them were present in next for few days so they should hit
20171206 as well.
Maybe the issue comes from different subsystem?
The only change that has been recently merged and is related to the
hardware available on peach-pit is this patch:
https://www.spinics.net/lists/linux-samsung-soc/msg61232.html
It probably changed the order of driver initialization, but I have no
idea what causes the deadlock (from the "random:" message I see that
kernel is somehow still operational).
Best regards
--
Marek Szyprowski, PhD
Samsung R&D Institute Poland
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