Messages in this thread | | | Date | Wed, 7 May 2003 12:31:12 -0700 (PDT) | From | Davide Libenzi <> | Subject | Re: top stack (l)users for 2.5.69 |
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On Wed, 7 May 2003, Richard B. Johnson wrote:
> It is my understanding that there is one kernel stack. If there > is a stack allocated for some "transition", and I guess there > may be, because of the mail I'm getting, then it has absolutely > no purpose whatsoever and is wasted valuable non-paged RAM. > > The reason why system-call parameters are passed in registers > is so that we didn't have the overhead of copying stuff from a > user stack to a kernel stack. > > Does anybody know (not guess) if this was stuff added for the > new non-interrupt 0x80 syscall code? I want to know how a > simple kernel got corrupted into this twisted thing. > > Anybody who has a copy of any of the Intel manuals since '386 > knows that there needs to be only one kernel stack.
I don't believe anyone is guessing here :)
- Davide
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