Re: userspace pagecache management tool

Rik van Riel
2007-03-03T22:28:56Z

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?

Then what's the point?

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