Re: Execute in place

[Al Boldi <a1426z@gawab.com>]

Hugh Dickins wrote:
> On Wed, 2 May 2007, Phillip Susi wrote:
> > Hugh Dickins wrote:
> > > tmpfs doesn't store its stuff in the page cache twice: that's true,
> > > and I didn't mean to imply otherwise.  But tmpfs doesn't contain any
> > > support for rom memory: you'd have to copy from rom to tmpfs to use
> > > it.
> >
> > The question is, when you execute a binary on tmpfs, does its code
> > segment get mapped directly where it's at in the buffer cache, or does
> > it get copied to another page for the executing process?  At least,
> > assuming this is possible due to the vma and file offsets of the segment
> > being aligned.
>
> Its pages are mapped directly into the executing process, without copying.

Thank GOD!  Boy, was I worried there for a second.

Now, if there were only an easy way to make tmpfs persistent?


Thanks!

--
Al