And FreeBSD also have a default split of 3GB userspace and 1GB. kernelspace when running with a default configuration. Linux people might want to try other os'es to compare the performance.
Best regards, Nicolai Petri
Ps. Sorry for my lame MS mailer - quoting is not something it knows how to do. :)
----- Original Message ----- From: "William Yu" <[EMAIL PROTECTED]>
I inferred this from reading up on the compressed vm project. It can be higher or lower depending on what devices you have in your system -- however, I've read messages from kernel hackers saying Linux is very aggressive in reserving memory space for devices because it must be allocated at boottime.
Josh Berkus wrote:William,
The theshold for using PAE is actually far lower than 4GB. 4GB is the total memory address space -- split that in half for 2GB for userspace, 2GB for kernel. The OS cache resides in kernel space -- after you take alway the memory allocation for devices, you're left with a window of roughly 900MB.
I'm curious, how do you get 1.1GB for memory allocation for devices?
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