[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: Fix for THREAD_GETMEM (et al) madness in useldt.h
From: |
Wolfram Gloger |
Subject: |
Re: Fix for THREAD_GETMEM (et al) madness in useldt.h |
Date: |
Fri, 24 Nov 2000 10:01:08 +0100 ("MET) |
Hello,
> While I'm on the topic, why is useldt.h only enabled
> (a) On i686 platforms (when every IA32 processor has both the GS register
> and LDT support)
> (b) On 2.4.x kernels (it appears to work fine on 2.2.16 and 2.2.18pre20).
I asked a similar question recently, and Uli Drepper suspected that
the LDT switching would be very slow on processors before i686.
I have yet to confirm that -- maybe you can check pthread_self()
performance in both cases, too, so we have some numbers.
It sure would be nice to get useldt.h (in particular FLOATING_STACKS)
on i585 as well.
Regards,
Wolfram.