Re: userspace pagecache management tool

Rik van Riel
2007-03-03T22:19:17Z

Andrew Morton wrote:
> On Sat, 3 Mar 2007 22:41:09 +0100 bert hubert <bert.hubert@netherlabs.nl> wrote:
>
>>> How can you make global policy decisions based on the intent
>>> of one program?
>> By not doing so.
>
> yup.
>
>> Andrew's program is fine in principle, except that the
>> linux kernel treats the communication of a program's intent as a global
>> instruction.
>
> argh.
>
> That felt good - let's do it again.
>
> argh.
>
>
> 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.

--
Politics is the struggle between those who want to make their country
the best in the world, and those who believe it already is. Each group
calls the other unpatriotic.