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SubjectRe: kernel: ldt allocation failed
On Wed, 6 Feb 2002, Jakub Jelinek wrote:

> Most sane architectures reserve a thread pointer register (%g6 resp. %g7 on
> sparc, tp on ia64, ppc will use %r2, alpha uses a fast pall call as thread
> "register", s390 uses user access register 0 (and s390x uar 0 and 1), etc.).
> On register starved ia32 there aren't too many spare registers, so %gs is
> used instead.

Actually really sane architectures, such as MIPS, have no unused
registers floating around just in case someone needs one in the next ten
years or so. They require an ABI change which can only be justified if
the benefit is large. So far I failed to see the benefit, but hopefully
it's only a fault of mine.

--
+ Maciej W. Rozycki, Technical University of Gdansk, Poland +
+--------------------------------------------------------------+
+ e-mail: macro@ds2.pg.gda.pl, PGP key available +

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