"Jeff V. Merkey" wrote:
>
> > and I have discovered something rather shocking, which is that the
> spinlock code in Linux is severely broken, and this is not due to a
> coding error, but a problem with the GCC compiler apparently generating
> garbage. There's also several issues with using "lock bts" instead of
> "xchg eax, 1", which is the recommended method for implementing
> spinlocks() on IA32 intel systems.
>
> What's really scary here is that a great deal of new code has been
> written that depends on this spinlock code, and once the spinlock code
> gets fixed properly, we may see tons of deadlocks and lockups all over
> the place since this code has been there for a very long time.
If you are correct here, it might explain why I'm getting rentering
error
into irq_inter routine with my SMP box and NFS.
(I've placed there a small trap which catch this problem)
--
There are three types of people in the world:
those who can count, and those who can't.
Zdenek Kabelac http://i.am/kabi/ kabi@i.am {debian.org; fi.muni.cz}
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