Messages in this thread | | | Date | Fri, 2 Sep 2011 11:46:08 -0700 | Subject | Re: [PATCH 06/13] x86/ticketlock: add slowpath logic | From | Eric Northup <> |
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On Thu, Sep 1, 2011 at 5:54 PM, Jeremy Fitzhardinge <jeremy@goop.org> wrote: > From: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> > > Maintain a flag in both LSBs of the ticket lock which indicates whether > anyone is in the lock slowpath and may need kicking when the current > holder unlocks. The flags are set when the first locker enters > the slowpath, and cleared when unlocking to an empty queue.
Are there actually two flags maintained? I only see the one in the ticket tail getting set/cleared/tested. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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