[Haskell-cafe] Re: Re: Hugs vs GHC (again)was: Re:
Marcin 'Qrczak' Kowalczyk
qrczak at knm.org.pl
Sat Jan 15 13:56:03 EST 2005
Pete Chown <1 at 234.cx> writes:
>> of course, [mmap] can only be done on a limited type of file on some
>> architectures, so it should be an optimization under the hood rather
>> than an exposed interface.
> In particular, you have to be careful not to run out of address space on
> 32-bit architectures. If you try to do file access by mapping the whole
> file into virtual memory, you won't be able to handle files larger than 2G
> or so. You also have to be careful not to map a number of file chunks,
> which in total exceed the address space available.
Which means that it *should* be explicit, rather than done under the
hood. It's a tradeoff, the programmer should be aware when to apply it,
the runtime should not impose a policy which would be hard to reverse.
__("< Marcin Kowalczyk
\__/ qrczak at knm.org.pl
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