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Re: Locks and the FSB

Subject: Re: Locks and the FSB
From: Elad Lahav <elad_lahav@xxxxxxxxxxxxxxxxxxxxx>
Date: Mon, 01 Dec 2008 17:00:47 -0500
Cc: Michael Blizek <michi1@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>, kernelnewbies@xxxxxxxxxxxx
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I'm wondering if the high event counts following spin_unlock_irqrestore() are due to an OProfile quirk. OProfile depends on interrupts, which are disabled inside the critical section protected by the spin lock. It may end up accounting for all events that occurred inside the critical section immediately after the processor exits this section.

--Elad

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References:
- Re: Locks and the FSB
  - From: Elad Lahav

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