Shaohua Li <[email protected]> wrote:
>
> > Please confirm that we in fact do not want to allow downed CPUs to
> > print things, then send a patch.
> Yep. In the cpu hotplug case, per-cpu data possibly isn't initialized
> even the system state is 'running'. As the comments say in the original
> code, some console drivers assume per-cpu resources have been allocated.
> radeon fb is one such driver, which uses kmalloc. After a CPU is down,
> the per-cpu data of slab is freed, so the system crashed when printing
> some info.
hm, that certainly sounds sane, but I do recall there were
reasonable-sounding reasons why the ia64 guys wanted printk-on-a-down-CPU
to work. Hopefully David can remember what the problem was so we can find
a more thorough fix.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
