Messages in this thread | | | Date | Wed, 19 Mar 2008 09:32:28 +0100 | From | Andi Kleen <> | Subject | Re: [PATCH prototype] [0/8] Predictive bitmaps for ELF executables |
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On Tue, Mar 18, 2008 at 10:44:37AM -0700, Andrew Morton wrote: > On Tue, 18 Mar 2008 18:20:45 +0100 Andi Kleen <andi@firstfloor.org> wrote: > > > > What's the permission problem? executable-but-not-readable files? Could > > > > Not writable. > > Oh. > > I doubt if a userspace implementation would even try to alter the ELF > files, really - there seems to be no point in it. This is just complexity
Well the information has to be somewhere and i think the ELF file is the best location for it. It makes it the most user transparent.
> > Yes it could, but i dont even want to thi nk about all the issues of > > doing such an interface. It is basically an microkernelish approach. > > I prefer monolithic simplicity. > > It's not complex at all. Pass a null-terminated pathname to the server and > keep running. The server will asynchronously read your pages for you.
But how do you update the bitmap in your scheme?
> > And I am really not a friend of unnecessary complexity. In the end > > complexity hurts you, no matter if it is in ring 3 or ring 0. > > There is no complexity here.
I have my doubts on that if you consider update too.
-Andi >
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