Messages in this thread | | | Date | Fri, 09 May 2003 18:20:21 -0400 | From | Timothy Miller <> | Subject | Re: hammer: MAP_32BIT |
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Ulrich Drepper wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > H. Peter Anvin wrote: > > >>No, it requires 31-bit addresses, and there was a discussion about how >>some things need 31-bit and some 32-bit addresses. > > > That's completely irrelevant to my point. Whether MAP_32BIT actually > has a 31 bit limit or not doesn't matter, it's limited as well in the > possible mmap blocks it can return. > > The only thing I care about is to have a hint and not a fixed > requirement for mmap(). All your proposals completely ignored this. >
If your program is capable of handling an address with more than 32 bits, what point is there giving a hint? Either your program can handle 64-bit pointers or it cannot. Any program flexible enough to handle either size dynamically would expend enough overhead checking that it would be worse than if it just made a hard choice.
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