Re: Possible race condition in i386 global_irq_lock handling.
From: Stephan von Krawczynski
Date: Thu Aug 21 2003 - 16:53:37 EST
> smb_rmb is enough in practice for x86 (in asm-i386), but not the right
> barrier in general because rmb only serializes reads against reads, so
> it would also make little sense while reading the i386 code. here you've
> to serialize a write against a read so it would be misleading unless you
> know exactly the lowlevel implementations of those barriers.
> smp_mb() before the while loop should be the correct barrier for all
> archs and the asm generated on x86 will be the same.
> alpha, ia64 and x86-64 (and probably others) needs it too.
Can some kind soul please provide me with the needed mini-patch. I would like
to try that on my constantly crashing SMP test box...
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/