Messages in this thread | ![/](/images/icornerl.gif) | | Date | Wed, 5 Mar 2003 22:21:07 +0100 | From | Andi Kleen <> | Subject | Re: Better CLONE_SETTLS support for Hammer |
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On Wed, Mar 05, 2003 at 11:32:36AM -0800, Ulrich Drepper wrote: > > If you just want to save one mmap/allocation: I think the context switch > > overhead will be more expensive than the allocation. > > And two more things: > > 1. every process will already use the prctl(ARCH_SET_FS). We are > talking here only about the 2nd thread and later. We need to use > prctl(ARCH_SET_FS) for TLS support.
Not when you put it into the first four GB. Then you can use the same calls as 32bit.
> 2. May I remind you that you were in the crowd who complained when we > requested a dedicated thread register? Yes, I still would prefer that > but I have no energy to battle for that.
I don't see the connection.
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