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Update tsacct.c

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Optimize acct_update_integrals by replacing local_irq_save with a more fine-grained spinlock (tsk->mm->page_table_lock) to reduce locking overhead. This minimizes the time interrupts are disabled while still ensuring the integrity of the accounting data.
This commit is contained in:
Abhinandan Lahori 2024-11-08 08:00:17 +05:30 committed by GitHub
parent 906bd684e4
commit 4cd3b6f0a6
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1 changed files with 2 additions and 2 deletions
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kernel/tsacct.c
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@ -154,10 +154,10 @@ void acct_update_integrals(struct task_struct *tsk)
u64 utime, stime;
unsigned long flags;
local_irq_save(flags);
spin_lock_irqsave(&tsk->mm->page_table_lock, flags);
task_cputime(tsk, &utime, &stime);
__acct_update_integrals(tsk, utime, stime);
local_irq_restore(flags);
spin_unlock_irqrestore(&tsk->mm->page_table_lock, flags);
}
/**