RE: linux-next: Tree for June 3

From: Luck, Tony
Date: Fri Jun 04 2010 - 16:47:01 EST


> What does a NaT consumption fault mean, and does it give the invalid
> address it was loaded off?

This almost always means that we dereferenced a NULL pointer ... though
any access into the bottom PAGE_SIZE of kernel virtual address space
will result in this trap. This happens on ia64 because we have a "NaT"
page mapped at 0x0 so that speculative loads that chase NULL pointers
at the end of lists behave more rationally.

Sadly I don't have the actual address. The register that was used
for the dereference isn't included in the OOPS output.

-Tony
--
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/