Fedora Kernel: Strict user copy checks: Disabled

[Reindl Harald]

Hi

is there a strong performance-wise reason for
"Strict user copy checks: Disabled" - IMHO if
something may make things more secure while not
have a dramatically performance impact security
in doubt should go first
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[root at rh:~]$ checksec --kernel
* Kernel protection information:

  Description - List the status of kernel protection mechanisms. Rather than
  inspect kernel mechanisms that may aid in the prevention of exploitation of
  userspace processes, this option lists the status of kernel configuration
  options that harden the kernel itself against attack.

  Kernel config: /boot/config-3.9.10-200.fc18.x86_64

  Warning: The config on disk may not represent running kernel config!

  GCC stack protector support:            Enabled
  Strict user copy checks:                Disabled
  Enforce read-only kernel data:          Enabled
  Restrict /dev/mem access:               Enabled
  Restrict /dev/kmem access:              Enabled