Date: Fri, 20 Jun 2003 15:00:20 +0400 (MSD) From: Igor Sysoev <is@rambler-co.ru> To: threads@freebsd.org Subject: Re: Implementing TLS: step 1 Message-ID: <Pine.BSF.4.21.0306201456430.25447-100000@is> In-Reply-To: <3EF2B952.64E731F9@mindspring.com>
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On Fri, 20 Jun 2003, Terry Lambert wrote: > Julian Elischer wrote: > > The big cost is that a processin x86 can only have a limited number of > > segments set up in teh Local descriptor table (LDT). > > I forget the actual number but i vaguely remember that it is 16383 or > > 8191 or something. > > 65536, but it includes the recursive mapping and the call trap, etc., > so it's reall 65531. LDT can have 8192 descriptors. GDT can have 8191 usefull descriptors. The first descriptor is null one. Igor Sysoev http://sysoev.ru/en/
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