Messages in this thread | | | From | (H. Peter Anvin) | Subject | Re: Killing clones | Date | 16 Sep 1997 09:42:14 GMT |
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Followup to: <Pine.LNX.3.95.970915132448.24625B-100000@penguin.transmeta.com> By author: Linus Torvalds <torvalds@transmeta.com> In newsgroup: linux.dev.kernel > > > > (and how does one grow/shrink a mmap'd region? That's one thing I still > > haven't figured out... apparently growing/shrinking mmap'd files uses > > 'ftruncate' but what about nonfile shared memory regions?) > > You can use "mremap()" to grow or shrink (or move) an existing memory map. > > I don't know if anybody uses it, though. >
DOSEMU does, for DPMI_realloc(); and I think at least some version of the mmap-based malloc()-implementation uses it for realloc(). This actually makes realloc() usable even for a substantial-sized memory region.
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