lkml.org 
[lkml]   [2003]   [Apr]   [30]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: NUMA-Q sys_ioperm()/sys_iopl()
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.

Please use cond_syscall to autogenerate the stubs, and make the compilation
of /ioport.c conditional on !CONFIG_X86_NUMAQ.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:35    [from the cache]
©2003-2011 Jasper Spaans