On 02/21/2014 05:38 PM, Ralf Baechle wrote:
On Thu, Feb 20, 2014 at 02:00:26PM +0000, Markos Chandras wrote:
From: Paul Burton <paul.burton@xxxxxxxxxx>
For Malta defconfigs which may run on an SMP configuration without
hardware cache anti-aliasing, a 16KB page size is a safer default.
Most notably at the moment it will avoid cache aliasing issues for
multicore proAptiv systems.
You're aware that this may cause binary compatibility issues with old
userland? So far the defaults were chosen to maximise compatibility
over performance.
Ralf
Hi Ralf,
Are you referring to programs hard coding the page size to 4k instead of
using the getpagesize()? Well yes this could be a problem. But is that a
real problem? We are changing the default value so whoever has such an
old userland can easily switch to the 4k page size. It may also be a
good opportunity to expose such application and get the fixed properly
:) But if that's not acceptable, we can drop the patch. Paul what do you
think?
--
markos
