Re: NUMA-Q sys_ioperm()/sys_iopl()

[William Lee Irwin III <wli@holomorphy.com>]

On Wed, Apr 30, 2003 at 05:28:25AM -0700, William Lee Irwin III wrote:
>> NUMA-Q cannot support these operations without significant
>> infrastructure to emulate a global port io space for userspace to
>> manipulate, possibly even with hooks into the scheduler.
>> Not only are the applications depending on this particular form of
>> privilege elevation generally inappropriate uses of these machines
>> (they are large "server-class" machines, typically shipped and run
>> headless), but the devices typically managed with these interfaces
>> are already explicitly unsupported in UNIX configurations.
>> This patch removes sys_iopl() and sys_ioperm() support conditional on
>> #ifdef CONFIG_X86_NUMAQ to prevent the device register corruption
>> condition without significant impact on core i386 support.

On Wed, Apr 30, 2003 at 01:55:21PM +0100, Christoph Hellwig wrote:
> Please use cond_syscall to autogenerate the stubs, and make the compilation
> of /ioport.c conditional on !CONFIG_X86_NUMAQ.

Never heard of it before. Get a hold of me in the obvious way to fill
me in.

Thanks.

-- wli