[Crash-utility] Re: invalid kernel virtual address: cc08 type: "cpu number (per_cpu)"

On Thu, 2009-11-12 at 13:39 +0000, Dave Anderson wrote: > ----- "Bob Montgomery" <bob.montgomery(a)hp.com&gt; wrote: > > > In the real smp case, we'll still try to read the small offset (cc08) > > like an address, but be spared any embarrassment by the QUIET| > > RETURN_ON_ERROR fix. > > Just to be clear, I think that we agree that: > > (1) the QUIET|RETURN_ON_ERROR be applied in both functions, > (2) the kt->__per_cpu_offset[] NULL-check should be completely dropped > in x86_64_per_cpu_init(), and > (3) the kt->__per_cpu_offset[] NULL-check should still be applied in > x86_64_get_smp_cpus() since that loop pre-requires that it's SMP. I think (3) makes it apparent what we're trying to prevent, but even without the NULL-check, if we go ahead and access cc08, the QUIET| RETURN_ON_ERROR fix alone would save us, I think. Either way my problem goes away :-) Is the next version getting close, or do we need to patch 4.1.0 internally for a while?