Re: userspace pagecache management tool

Andrew Morton
2007-03-03T22:38:37Z

On Sat, 03 Mar 2007 17:28:35 -0500 Rik van Riel <riel@redhat.com> wrote:

> Andrew Morton wrote:
> > 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.
>
> Are you saying the user should not use your script with their
> backup program?

No.

This is getting silly.