Re: OT: free cmd is lying to me
On Mon, 2001-12-03 at 03:04, Holger Rauch wrote:
> Hi Michael!
>
> First of all, thanks for your hint!
>
> On 2 Dec 2001, Michael Heldebrant wrote:
>
> > IIRC from the Understanding the Linux Kernel book by O'Reilly, linux
> > doesn't actually worry about memory until you actually use it. I'm not
> > sure if a malloc counts as using it for storing data since I'm no C
> > programmer but unless you actually write to the memory linux doesn't
> > bother setting up the actual pages since it's a waste for the system to
> > make and tear down pages that are never accessed.
>
> You mean I actually have to write data to the malloc()ed memory region?
I beleive so, if it's just malloced and not used the kernel won't bother
making the page until the last second when it's needed for a read or
write. I'll go read my kernel book again and report back if thats not
the case.
--mike
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