On Mon, Mar 26, 2007 at 09:07:50PM +0200, Matus UHLAR - fantomas wrote: > > On 26.03.07 14:35, Roberto C. Sánchez wrote: > > With a 32-bit CPU, you are limited to 4 GB address space no matter what. > > Usually, it is 1 GB for the process and 3 GB for the kernel. There are > > patches available that make a 2/2 split possible. However, there are > > performance issues to consider. IIRC, even CPUs that have PAE (36-bit > > addressing for up to 64 GB of physical RAM), can still only support 4 GB > > address space *per process* because they are at heart 32-bit machines. > > Yes, but that's just and only address space for one process. CPUs with PAE > extension can have 64GB of REAL memory, so they can have at least that much > of virtual memory. Note that tmpfs doesn't need to be addressable by one > process. > IIRC, even though you may have >4 GB of physical memory, your virtual memory space *per process* is limited to 4 GB. Regards, -Roberto -- Roberto C. Sánchez http://people.connexer.com/~roberto http://www.connexer.com
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