debug head -r368500 kernel (for example) : "lock order reversal: (sleepable after non-sleepable)" involving ure0 and a sysctl lock; more

[Mark Millard]

On 2020-Dec-19, at 03:09, Hans Petter Selasky <hps at selasky.org> wrote:

> Please test:
> 
> https://svnweb.freebsd.org/changeset/base/368799
> https://svnweb.freebsd.org/changeset/base/368801
> 
> --HPS

I grabbed a debug -r368803 kernel from artifacts (first arm64
snapshot available containing the above 2 updates):

https://artifact.ci.freebsd.org/snapshot/13.0-CURRENT/r368803/arm64/aarch64/kernel.txz

I used it to substitute in the updated debug kernel and booted
the same configuration.

It booted fine with no LOR or uma_zalloc_debug related console
output.

I've not tried my own non-debug build yet but that kind of
context had never given me a clue of these issues anyway. (I
am not expecting the above to change the non-debug "Root mount
waiting for: usbus0" for the uefi/ACPI USB3 SSD based boot
sequence.)


===
Mark Millard
marklmi at yahoo.com
( dsl-only.net went
away in early 2018-Mar)