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Date: Thu, 9 Nov 2017 11:41:26 +0300 From: "Pavel V. Panteleev" <panteleev_p@...t.ru> To: linux-kernel@...r.kernel.org Cc: mingo@...hat.com, peterz@...radead.org Subject: pt_regs usage in cpuacct_charge() Hello! 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 -> cpuacct_charge. 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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