* pt_regs usage in cpuacct_charge()
@ 2017-11-09 8:41 Pavel V. Panteleev
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From: Pavel V. Panteleev @ 2017-11-09 8:41 UTC (permalink / raw)
To: linux-kernel; +Cc: mingo, peterz
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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2017-11-09 8:41 pt_regs usage in cpuacct_charge() Pavel V. Panteleev
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