Messages in this thread | | | Date | Mon, 22 Apr 2013 15:56:42 -0400 | From | Rik van Riel <> | Subject | Re: Preemptable Ticket Spinlock |
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On 04/22/2013 03:49 PM, Peter Zijlstra wrote: > On Mon, 2013-04-22 at 08:52 -0400, Rik van Riel wrote:
>> If the native spin_lock code has been called already at >> that time, the native code would still need to be modified >> to increment the ticket number by 2, so we end up with a >> compatible value in each spin lock's .tickets field, and >> prevent a deadlock after we switch over to the paravirt >> variant. > > I thought the stuff already made it upstream, but apparently not; the > lastest posting I'm aware of is here: > > https://lkml.org/lkml/2012/5/2/105 > > That stuff changes the normal ticket increment as well..
Jiannan,
It looks like the patch above could make a good patch 1 (or 2) in your patch series :)
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