I'm working on a module that needs to allocate a large region of memory. I know that in this case I should use vmalloc(). The problem is the size of memory allocation for vmalloc() is 128MB maximally, but I need to allocate more than that.
Why? Why do you need so much memory allocated in one shot?
Do I have to use a array to hold a number of small regions of memory? What is the largest physically continuous memory the kmalloc() can allocate?
AFAIK, that depends on the memory fragmentation. If there's contiguous memory available, kmalloc should be able to allocate it for you (barring the size restrictions). The sizes are defined in kmalloc_sizes.h. You can try the CONFIG_LARGE_ALLOCS to support bigger allocations.
Fei
-- Pradeep Padala http://ppadala.blogspot.com -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
