linux-kernel - Re: userspace pagecache management tool

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Date:	Sat, 3 Mar 2007 14:38:26 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Rik van Riel <riel@...hat.com>
Cc:	bert hubert <bert.hubert@...herlabs.nl>,
	linux-kernel@...r.kernel.org
Subject: Re: userspace pagecache management tool

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

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