In message <[EMAIL PROTECTED]>, Alfred Perlstein writes:

>> It would be much more valuable to add a 
>>      mremap(void *from, void *to, size_t length);
>> since that can _solve_ the problem in _all_ cases, rather than
>> add more or less byzantine workarounds for silly benchmarks.
>You're right that it would be a better optimization, however it's
>much more code to write than simply passing a flag down to the code
>responsible for the allocation especially when you _know_ you'll
>need it.

Since when has going that extra mile to do it right been the wrong
thing to do in FreeBSD ?  :-)

And everybody with VM clue I've asked says it would be trivial to
flip two page-table entries, so for all I care it can be

        mexchangemapping(void *from, void *to, size_t length)

Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
[EMAIL PROTECTED]         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.

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