[nsd-users] Remove needless memory zeroing
joerg at britannica.bec.de
Tue Jan 19 21:20:28 UTC 2016
On Tue, Jan 19, 2016 at 05:42:41PM +0100, Stephane Bortzmeyer wrote:
> On Mon, Jan 18, 2016 at 10:46:03PM -0500,
> Michael McConville <mmcco at mykolab.com> wrote
> a message of 24 lines which said:
> > Unless I'm misunderstanding something, anonymously mmapped memory is
> > always zeroed by the kernel
> This is written in Linux mmap man page:
> > its contents are initialized to zero
> But not in FreeBSD mmap man page:
> > MAP_ANON Map anonymous memory not associated with any specific
> > file. The file descriptor used for creating MAP_ANON
> > must be -1. The offset argument must be 0.
> So, portability seems to require mmset.
It doesn't. If anything, it is a bug in the FreeBSD man page.
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