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SubjectRe: kernel: ldt allocation failed
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> Are you sure it does? LGDT with non zero argument shouldn't be that costly. 
> The %fs switching adds some locked cycles for reloading the segment cache,
> but because Windows uses that I would it expect to be reasonably optimized
> on CPUs.

Its measurable, even on an Athlon.

> I actually tried to complain because on x86-64 it is more costly, but to
> no avail.

The more I see from glibc the more I realise that Linus is right - it needs
replacing

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