On Wed, May 10, 2006 at 02:03:59PM +1000, Paul Mackerras wrote:
> With this patch, 64-bit powerpc uses __thread for per-cpu variables.
How do you plan to address the compiler optimizing
__thread int foo;
{
use(foo);
schedule();
use(foo);
}
into
{
int *tmp = &foo; // tls arithmetic here
use(*tmp);
schedule();
use(*tmp);
}
Across the schedule, we may have changed cpus, making the cached
address invalid.
r~
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