Martin v. Löwis wrote:
Today, there are two cases when malloc returns memory on a typical
Unix system (in particular, in Linux malloc):
a) if the malloc block block is small (below page size), it is allocated
from the brk heap, where it can only be returned if the last page of
that heap is completely free, and
b) if the block is large (multiple pages), it gets returned to the
system right away.
Case b) can only happen if the C malloc uses mmap to allocate large
blocks.
I believe (and John will correct me if I'm wrong) that xlrd uses mmap,
so why am I not seeing the memory being returned?
Chris
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