Messages in this thread | | | From | Zdenek Kabelac <> | Subject | Re: spinlocks() are severely broken in 2.2.X and 2.4.X for modules | Date | Mon, 3 Jul 2000 14:09:38 GMT |
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"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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