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Date:   Thu, 9 Nov 2017 11:41:26 +0300
From:   "Pavel V. Panteleev" <>
Subject: pt_regs usage in cpuacct_charge()


In cpuacct_charge() function pt_regs of other thread could be used. 
There is a such call chain: ...-> __schedule -> pick_next_task_fair -> 
load_balance -> idle_balance -> load_balance -> detach_tasks -> 
deactivate_task -> dequeue_task_fair -> dequeue_entity -> update_curr -> 

I think that pt_regs could disappeared or be changed. How it's assumed 
to syncronize pt_regs usage in this place?

Kernel verion 4.9.47-rt47.

Best regards,
Pavel V. Panteleev

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