Hi everyone,
I'm modifying kernel code and running into system dead-lock issues. I have
printk statements to try to retrieve info about the freeze after I do a hard
shutdown, but printk is asynchronous so /var/log/kern.log only shows NULL
character gibberish instead (^@^@^@^@). Is there a way to make printk
synchronous? I have looked at people using
[printk_sync](https://lore.kernel.org/patchwork/patch/671535/) and
[printk.synchronous](https://stackoverflow.com/questions/26413750/how-to-avoid-printk-log-dropping-in-linux-kernel)
variables as recently as 2017, but I don't see any reference to these anymore
in the kernel version I have (5.4).
Thanks for the help.
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