Denis Vlasenko <vda@port.imtp.ilyichevsk.odessa.ua> writes:
>
> I am ignorant on the subject, but why LDT is used in Linux at all?
> LDT register can be set to 0, this can speed up task switch time and save
> some memory used for LDT.
glibc thread local data uses an LDT for the segment register.
glibc 2.3 seems to plan to use segment register based thread local data for
even non threaded programs, so it would be a good idea to optimize LDT
allocation a bit (= not allocate 64K of vmalloc space every time
sys_modify_ldt is called - there is only 8MB of it)
-Andi
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This archive was generated by hypermail 2b29 : Thu Feb 07 2002 - 21:00:49 EST