Messages in this thread | | | Date | Tue, 12 Jul 2016 18:38:05 +0900 | From | Sergey Senozhatsky <> | Subject | Re: [Query] Preemption (hogging) of the work handler |
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Hello,
On (07/11/16 15:35), Viresh Kumar wrote: [..] > Sometimes, the platform doesn't come back after suspend. I have tried > enabling no-console-suspend and the last line it prints is: > > Disabling non-boot CPUs > > And nothing after that at all. We have to forcefully reboot the phone > after that. Moving the prints to they synchronous way (using > echo 1 > /sys/module/printk/parameters/synchronous), fixes that issue.
hm... I'll take a look.
> So, the asynchronous printing have a issue that only we are hitting. > It looks like that all the CPUs are gone except CPU0 and that CPU is > hogged by the printk thread to print stuff as well as to suspend the > system, and something eventually gets wrong.
-ss
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