Re: [patch] Real-Time Preemption, -RT-2.6.13-rc4-V0.7.52-01

[George Anzinger <george@mvista.com>]

Keith Owens wrote:
> On Tue, 02 Aug 2005 18:12:27 -0700, 
> George Anzinger <george@mvista.com> wrote:
> > How about something like:
> > 	if (current + THREAD_SIZE/sizeof(long) - (regs + sizeof(pt_regs)) > MAGIC)
>
> current points to the current struct task, regs points to the kernel
> stack.  Those two data areas can be completely separate, as they are on
> i386.  Also i386 uses a separate kernel stack for interrupts.
Acually I must mean the thread_info and not current.  i386 only uses a 
seperate stack if you use 4K stacks.  I think others use seperate 
interrupt stacks, however :(.  Also, on thinking on it, I think some 
archs don't call the registers pt_regs either.  Oh, well, it was a 
thought...
Waiting for its brother... :)
--
George Anzinger   george@mvista.com
HRT (High-res-timers):  http://sourceforge.net/projects/high-res-timers/
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