[mythtv-users] Upgrading from 32-bit to 64-bit and maybe a distro switch?

Johnny jarpublic at gmail.com
Wed Jun 17 17:42:13 UTC 2009

> Sure it can.  It can't use it all at once, but you have to change the
> page tables on a context switch anyway, so each process can use almost
> 4G (minus whatever is reserved for the OS and hardware registers).
> The OS just has to be smart enough in setting up the page tables to make
> it all work.

Are you talking about using PAE? I forgot about that. That usually
involves compiling a custom kernel or using a server kernel. Plus the
hit for the extra steps in the memory mapping. It seems like that has
drawbacks, whereas going to 64-bit has very few issues with most
modern distros.

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