Messages in this thread |  | | Date | Fri, 7 Sep 2001 06:56:26 -0600 (MDT) | From | Chris Ricker <> | Subject | Re: Linux Preemptive patch success 2.4.10-pre4 + lots of other patches |
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On 7 Sep 2001, Robert Love wrote:
> On Fri, 2001-09-07 at 01:19, Daniel Phillips wrote: > > The other Unices are at least evenly split, or mostly preemptible. > > Typically, a more complex strategy is used where spinlocks can sleep > > after a few spins. This patch is very conservative in that regard, > > it basically just uses the structure we already have, SMP spinlocks. > > I did not know other Unices were (in general) preemptible. Solaris is? > The only one I thought was preemptible was Irix.
Solaris is, and has been since good ol' Solaris 2.0. So's AIX and even more obscure things like DG/UX. I'd think all SysVR4 derivatives have to be, by virtue of the SysV schedular (threads have priorities from 0 to 159; system threads run from 60 to 99, so the schedular must be able to preempt system threads for the real-time threads from 100 to 159).
later, chris
-- Chris Ricker kaboom@gatech.edu chris@gurulabs.com
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