Messages in this thread |  | | Date | Thu, 16 Apr 2015 12:49:59 +0200 (CEST) | From | Thomas Gleixner <> | Subject | Re: [PATCH 2/3 v2] futex: avoid double wake up in futex_wake() on -RT |
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On Thu, 16 Apr 2015, Peter Zijlstra wrote:
> On Thu, Apr 16, 2015 at 11:19:41AM +0200, Thomas Gleixner wrote: > > So any code which does not handle a spurious wakeup is broken > > independent of the futex changes. So really nothing to worry about. > > Back when we did this: > > http://lkml.iu.edu/hypermail/linux/kernel/1109.1/01941.html > http://lkml.iu.edu/hypermail/linux/kernel/1109.1/01943.html > > Things came apart -- notably sysvsems. > > And yes its true that anything not dealing with spuriuos wakups is > borken, but there's still quite a lot of borken out there, although I > think we fixed all the really common ones. > > But if we decide we want to go do this, I'd propose we reintroduce this > delayed wake list thing again.
Indeed. Forgot about that completely.
Thanks,
tglx
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