Messages in this thread | | | Date | Mon, 27 Dec 2004 15:44:07 -0800 | From | Ulrich Drepper <> | Subject | Re: 2.4, 2.6, i686/athlon and LDT's |
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On Mon, 27 Dec 2004 15:55:53 -0500, Brian Gerst <bgerst@didntduck.org> wrote: > Using the LDT isn't inherently slower, since the cpu caches the segment > descriptor regardless of if it came from the GDT or LDT.
Not using LDT's on 2.4 kernel other than RHEL3's means to have a different ABI. This is the /lib/libpthread.so.0 RH is shipping which simply cannot be used in some/many situations since there is no "thread register". This means the programmer is not able to select size and/or location of the stacks. Interfaces like pthread_attr_setstack() simply won't work at all.
So, do't confuse people with "does anyone have comparison information w/threads using LDT's and without (performance, protection, etc)?". That's comparing apples and oranges. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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