Re: 2.4, 2.6, i686/athlon and LDT's

[Arjan van de Ven]

On Mon, 2004-12-27 at 11:46 -0800, Tymm Twillman wrote:
> Hi all,

> 
> It appears that use of the LDT is to speed up context switching between 
> threads, although I haven't even found especially good references WRT 
> that.  I have looked through the info in the IA Developers publications 
> and have whacked my head against Google quite a bit.  However, every bit 
> of clarity I've found there has been offset by new confuzled bits.

LDT's are *slow*. That's why glibc will try to avoid using them
nowadays, and with 2.6 it won't; as for 2.4.. it depends if you use a
vendor 2.4 it might be able to avoid using LDT's as well.


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