Re: userspace pagecache management tool

Andrew Morton
2007-03-03T22:26:31Z

On Sat, 03 Mar 2007 17:19:00 -0500 Rik van Riel <riel@redhat.com> wrote:

> > It is *not* a global instruction. It uses setenv, so the user's policy
> > affects only the target process and its forked children.
>
> ... and all other processes accessing the same file(s)!
>
> Your library and the system calls may be limited to one process,
> but the consequences are global.

Yes. So what? If the user wants to go and evict libc.so from pagecache
then he can do so - the kernel has provided syscalls with which this can be
done for at least seven years. Bad user, shouldn't do that.