Re: mm question

[volodya@mindspring.com]

On Mon, 10 Dec 2001, Rik van Riel wrote:

> On Mon, 10 Dec 2001 volodya@mindspring.com wrote:
> > On Mon, 10 Dec 2001, Alan Cox wrote:
> >
> > > > I don't want to move them - I just want to collect all that are free and
> > > > then try to free some more.
> > >
> > > How will you free them, you don't know who owns them.
> >
> > I think you misunderstood me - this allocation happens in response to
> > the system call _not_ in an interrupt handler. So it is ok to wait -
> > as long as needed. I was thinking of calling page swapper or something
> > and perhaps going after I/O buffers first.
> 
> Even if you have a handle on a physical page, you don't know
> what processes are using the page, nor if there are additional
> users besides the processes.
> 
> This makes it rather hard to go around trying to free pages
> within a certain physical range.

Well, what does kernel do when it runs out of memory ? For example when I
mmap a large file and start reading it back and force ?

                                   Vladimir Dergachev

> 
> cheers,
> 
> Rik
> -- 
> DMCA, SSSCA, W3C?  Who cares?  http://thefreeworld.net/
> 
> http://www.surriel.com/		http://distro.conectiva.com/
>