malloc_trim — release free memory from the top of the heap
attempts to release free memory at the top of the heap (by
calling sbrk(2) with a suitable
specifies the amount of free space to leave untrimmed at the
top of the heap. If this argument is 0, only the minimum
amount of memory is maintained at the top of the heap (i.e.,
one page or less). A nonzero argument can be used to maintain
some trailing space at the top of the heap in order to allow
future allocations to be made without having to extend the
heap with sbrk(2).
returns 1 if memory was actually released back to the system,
or 0 if it was not possible to release any memory.
For an explanation of the terms used in this section, see attributes(7).
This function cannot release free memory located at places other than the top of the heap.
This function releases only memory in the main arena.
This page is part of release 4.07 of the Linux
man-pages project. A
description of the project, information about reporting bugs,
and the latest version of this page, can be found at
Copyright (c) 2012 by Michael Kerrisk <mtk.manpagesgmail.com>
Permission is granted to make and distribute verbatim copies of this
manual provided the copyright notice and this permission notice are
preserved on all copies.
Permission is granted to copy and distribute modified versions of this
manual under the conditions for verbatim copying, provided that the
entire resulting derived work is distributed under the terms of a
permission notice identical to this one.
Since the Linux kernel and libraries are constantly changing, this
manual page may be incorrect or out-of-date. The author(s) assume no
responsibility for errors or omissions, or for damages resulting from
the use of the information contained herein. The author(s) may not
have taken the same level of care in the production of this manual,
which is licensed free of charge, as they might when working
Formatted or processed versions of this manual, if unaccompanied by
the source, must acknowledge the copyright and authors of this work.