From: "Pavel V. Panteleev" <panteleev_p@mcst.ru>
To: linux-kernel@vger.kernel.org
Cc: mingo@redhat.com, peterz@infradead.org
Subject: pt_regs usage in cpuacct_charge()
Date: Thu, 9 Nov 2017 11:41:26 +0300 [thread overview]
Message-ID: <5A0414B6.1060100@mcst.ru> (raw)
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
reply other threads:[~2017-11-09 8:57 UTC|newest]
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