The 11.1-RC3 can only boot and attach disks in "Safe mode", otherwise gets stuck attaching

[Mark Martinec]

Just a short report to a thread I started when 11.1 came out.

This machine would stall in a busy loop while attaching disks
during boot. Rebuilding a kernel with EARLY_AP_STARTUP disabled
avoided the problem. This was a situation through the whole
11.1 life cycle (i.e. patch releases did not help).

Today I have upgraded this host to 11.2-BETA2, and it is
no longer necessary to disable EARLY_AP_STARTUP. Good, thanks!

   Mark


> 2017-07-20 02:03, Mark Johnston wrote:
>> One thing to try at this point would be to disable EARLY_AP_STARTUP in
>> the kernel config. That is, take a configuration with which you're 
>> able
>> to reproduce the hang during boot, and remove "options
>> EARLY_AP_STARTUP".
> 
> 2017-07-20 15:45, Mark Martinec wrote:
> Done. And it avoids the problem altogether! Thanks.
> Tried a reboot several times and it succeeds every time.
> 
> Here is all that I had in a config file for building a kernel,
> i.e. I took away the 'options DDB' which also seemingly avoided
> the problem:
>   include GENERIC
>   ident NELI
>   nooptions EARLY_AP_STARTUP
> 
>> This feature has a fairly large impact on the bootup process and has
>> had a few problems that manifested as hangs during boot. There was at
>> least one other case where an innocuous change to the kernel
>> configuration "fixed" the problem by introducing some second-order
>> effect (causing kernel threads to be scheduled in a different
>> order, for instance).
[...]