[PATCH] kexec: yield to scheduler when loading kimage segments

Farnitano, Jarrett jmf at amazon.com
Mon Jun 11 16:47:46 PDT 2018


> On 6/11/18, 4:00 PM, "Eric W. Biederman" <ebiederm at xmission.com> wrote:
> 
>     Is there a practical problem with unresponsiveness?  You are talking
>     an embedded machine and rarely are there people in front of embedded
>     computers these days.

I did run into a practical problem. Hardware watchdogs on embedded systems can have short timers on the order of seconds. If the system is locked up for a few seconds with only a single core available, the watchdog may not be pet in a timely fashion. If this happens, the hardware watchdog will fire and reset the system.

This really only becomes a problem when you are working with a single core, a decently sized initrd, and have a constrained hardware watchdog.  

Jarrett



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