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Hi!

I need to have user processes to allocate more than 1GB of memory, the
default of MAXDSIZ on i386. What is the largest safe size? 3GB?

Also, how does sbrk/brk work? In uvm_mmap.c sys_sbrk returns ENOENT? C
library calls comined sbrk (user memory) and mmap (page directory) for
memory allocation.

I'm confused.. anyway, is 3GB limit safe to recompile the kernel?
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