In muc.lists.freebsd.hackers, you wrote:
> I know that this was discussed in the past but I can't find out what to
> do ?
>
> In Linux if I have to resize a mmap 'ed object I can just use mremap....
> but in FreeBSD if, I want to resize it what do I do ?
Have you tried mmap'ing the file again at the same address, but with a
larger length ?
As I see it, the only advantage of using mmap instead of read/write interface
is to avoid the extra system calls. However, by calling mremap or mmap
repeatedly, you're losing that advantage. I think you're better off by
extending your map in larger chunks, reducing the number of mmap/mremap
calls. If you have a big enough address space, just use a large mmap region
to begin with.
-Arun
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