On 02/15/2015 08:57 PM, Tomas Vondra wrote:
One of the wilder ideas (I mentined beer was involved!) was a memory allocator based on mmap [2], bypassing the libc malloc implementation altogether. mmap() has some nice features (e.g. no issues with returning memory back to the kernel, which may be problem with sbrk). So I hacked a bit and switched the AllocSet implementation to mmap().
glibc's malloc() also uses mmap() for larger allocations. Precisely because those allocations can then be handed back to the OS. I don't think we'd want to use mmap() for small allocations either. Let's not re-invent malloc()..
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