mmap bug?
Joseph Koshy
joseph.koshy at gmail.com
Sun Jul 31 18:15:21 GMT 2005
gk> That's something I didn't test. No, the 'extra' data
gk> disappears.
So the 'extra' data isn't reaching the FS and is probably
being served up from a cached VM data the second time your
test program ran.
This is still a bug though: the mmap(2) manual page
says:
...
If len is not a multiple of
the page-size, the mapped region may extend past the
specified range. Any such extension beyond the end of the
mapped object will be zero-filled.
...
We are clearly not doing the zero-filling.
--
FreeBSD Volunteer, http://people.freebsd.org/~jkoshy
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