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Re: ima: use of radix tree cache indexing == massive waste of memory?

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From: Kyle McMartin
Subject: Re: ima: use of radix tree cache indexing == massive waste of memory?
Date: Monday, October 18, 2010 - 10:10 am

On Mon, Oct 18, 2010 at 12:48:54PM -0400, Eric Paris wrote:

My beef is #2, which is what I want to see solved. If there's a million
people using Fedora, and 2 people use IMA, that's an awful lot of bytes
that could be otherwise used.

I think it should be entirely opt in, with a CONFIG_IMA_DEFAULT_ON or
something like we do for security hooks.

Anyway, If you can address #2, then I'm happy having it enabled. If it's
taken us this long to notice the impact, then it doesn't seem to be
all that large in the general case, and if it can be reduced, then that
should make everyone happy.

--Kyle
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Messages in current thread:
ima: use of radix tree cache indexing == massive waste of ..., Dave Chinner, (Fri Oct 15, 11:52 pm)
Re: ima: use of radix tree cache indexing == massive waste ..., Christoph Hellwig, (Sat Oct 16, 12:20 pm)
Re: ima: use of radix tree cache indexing == massive waste ..., H. Peter Anvin, (Sat Oct 16, 2:10 pm)
Re: ima: use of radix tree cache indexing == massive waste ..., Dave Chinner, (Sat Oct 16, 5:35 pm)
Re: ima: use of radix tree cache indexing == massive waste ..., Christoph Hellwig, (Sat Oct 16, 5:49 pm)
Re: ima: use of radix tree cache indexing == massive waste ..., J.H., (Sat Oct 16, 5:54 pm)
Re: ima: use of radix tree cache indexing == massive waste ..., Kyle McMartin, (Sat Oct 16, 6:09 pm)
Re: ima: use of radix tree cache indexing == massive waste ..., Christoph Hellwig, (Sat Oct 16, 6:13 pm)
Re: ima: use of radix tree cache indexing == massive waste ..., Dave Chinner, (Sat Oct 16, 7:11 pm)
Re: ima: use of radix tree cache indexing == massive waste ..., Ingo Molnar, (Sat Oct 16, 10:40 pm)
Re: ima: use of radix tree cache indexing == massive waste ..., Ingo Molnar, (Sat Oct 16, 10:49 pm)
Re: ima: use of radix tree cache indexing == massive waste ..., Mimi Zohar, (Sat Oct 16, 10:57 pm)
Re: ima: use of radix tree cache indexing == massive waste ..., Peter Zijlstra, (Sun Oct 17, 4:02 am)
Re: ima: use of radix tree cache indexing == massive waste ..., Eric Paris, (Sun Oct 17, 6:12 am)
Re: ima: use of radix tree cache indexing == massive waste ..., Peter Zijlstra, (Sun Oct 17, 6:59 am)
Re: ima: use of radix tree cache indexing == massive waste ..., Peter Zijlstra, (Sun Oct 17, 7:04 am)
Re: ima: use of radix tree cache indexing == massive waste ..., Mimi Zohar, (Sun Oct 17, 7:09 am)
Re: ima: use of radix tree cache indexing == massive waste ..., Eric Paris, (Sun Oct 17, 7:16 am)
Re: ima: use of radix tree cache indexing == massive waste ..., Christoph Hellwig, (Sun Oct 17, 11:46 am)
Re: ima: use of radix tree cache indexing == massive waste ..., Christoph Hellwig, (Sun Oct 17, 11:49 am)
Re: ima: use of radix tree cache indexing == massive waste ..., Christoph Hellwig, (Sun Oct 17, 11:52 am)
Re: ima: use of radix tree cache indexing == massive waste ..., Pavel Machek, (Sun Oct 17, 12:39 pm)
Re: ima: use of radix tree cache indexing == massive waste ..., Dave Chinner, (Sun Oct 17, 5:07 pm)
Re: ima: use of radix tree cache indexing == massive waste ..., James Morris, (Sun Oct 17, 5:49 pm)
Re: ima: use of radix tree cache indexing == massive waste ..., Kyle McMartin, (Sun Oct 17, 11:25 pm)
Re: ima: use of radix tree cache indexing == massive waste ..., Andrew Morton, (Sun Oct 17, 11:36 pm)
Re: ima: use of radix tree cache indexing == massive waste ..., Dave Chinner, (Mon Oct 18, 2:29 am)
Re: ima: use of radix tree cache indexing == massive waste ..., Peter Zijlstra, (Mon Oct 18, 4:57 am)
Re: ima: use of radix tree cache indexing == massive waste ..., Mimi Zohar, (Mon Oct 18, 6:31 am)
Re: ima: use of radix tree cache indexing == massive waste ..., Ted Ts'o, (Mon Oct 18, 7:59 am)
Re: ima: use of radix tree cache indexing == massive waste ..., Peter Zijlstra, (Mon Oct 18, 8:02 am)
Re: ima: use of radix tree cache indexing == massive waste ..., Eric Paris, (Mon Oct 18, 8:02 am)
Re: ima: use of radix tree cache indexing == massive waste ..., Mimi Zohar, (Mon Oct 18, 9:03 am)
Re: ima: use of radix tree cache indexing == massive waste ..., Ryan Ware, (Mon Oct 18, 9:44 am)
Re: ima: use of radix tree cache indexing == massive waste ..., Ryan Ware, (Mon Oct 18, 9:46 am)
Re: ima: use of radix tree cache indexing == massive waste ..., Eric Paris, (Mon Oct 18, 9:48 am)
Re: ima: use of radix tree cache indexing == massive waste ..., Kyle McMartin, (Mon Oct 18, 10:10 am)
Re: ima: use of radix tree cache indexing == massive waste ..., Kyle McMartin, (Mon Oct 18, 10:34 am)
Re: ima: use of radix tree cache indexing == massive waste ..., Linus Torvalds, (Mon Oct 18, 10:56 am)
Re: ima: use of radix tree cache indexing == massive waste ..., H. Peter Anvin, (Mon Oct 18, 11:06 am)
Re: ima: use of radix tree cache indexing == massive waste ..., Ingo Molnar, (Mon Oct 18, 11:11 am)
Re: ima: use of radix tree cache indexing == massive waste ..., J.H., (Mon Oct 18, 11:12 am)
Re: ima: use of radix tree cache indexing == massive waste ..., H. Peter Anvin, (Mon Oct 18, 11:13 am)
Re: ima: use of radix tree cache indexing == massive waste ..., Eric Paris, (Mon Oct 18, 11:13 am)
Re: ima: use of radix tree cache indexing == massive waste ..., Ingo Molnar, (Mon Oct 18, 11:19 am)
Re: ima: use of radix tree cache indexing == massive waste ..., Eric Paris, (Mon Oct 18, 11:43 am)
Re: ima: use of radix tree cache indexing == massive waste ..., John Stoffel, (Mon Oct 18, 12:24 pm)
Re: ima: use of radix tree cache indexing == massive waste ..., Eric Paris, (Mon Oct 18, 5:58 pm)
Re: ima: use of radix tree cache indexing == massive waste ..., Pavel Machek, (Mon Oct 25, 6:18 am)