On Mon, Apr 14, 2014 at 7:47 PM, Doug Barton <dougb@dougbarton.us> wrote:
On 04/14/2014 05:50 PM, John Levine wrote:
In article <534C68F4.305@cox.net> you write:
On 4/14/2014 9:38 AM, Matthew Black wrote:
Shouldn't a decent OS scrub RAM and disk sectors before allocating them to processes, unless that process enters processor privileged mode and sets a call flag? I recall digging through disk sectors on RSTS/E to look for passwords and other interesting stuff over 30 years ago.
I have been out of the loop for quite a while but my strongly held belief is that such scrubbing would be an enormous (and intolerable) overhead ...
It must be quite a while. Unix systems have routinely cleared the RAM and disk allocated to programs since the earliest days.
When you say "clear the disk allocated to programs" what do you mean exactly?
Is that like "sudo rm -rf /bin" ? ;P Matt