linux-kernel - Re: userspace pagecache management tool

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Date:	Sat, 03 Mar 2007 17:28:35 -0500
From:	Rik van Riel <riel@...hat.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
CC:	bert hubert <bert.hubert@...herlabs.nl>,
	linux-kernel@...r.kernel.org
Subject: Re: userspace pagecache management tool

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?

Then what's the point?

-- 
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.
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