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

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Message-ID: <20101026073159.GA7049@ucw.cz>
Date:	Tue, 26 Oct 2010 09:31:59 +0200
From:	Pavel Machek <pavel@....cz>
To:	"Ware, Ryan R" <ryan.r.ware@...el.com>
Cc:	Mimi Zohar <zohar@...ux.vnet.ibm.com>,
	Dave Chinner <david@...morbit.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Kyle McMartin <kyle@...artin.ca>,
	James Morris <jmorris@...ei.org>,
	Christoph Hellwig <hch@...radead.org>,
	"kernel@...ts.fedoraproject.org" <kernel@...ts.fedoraproject.org>,
	Mimi Zohar <zohar@...ibm.com>,
	"warthog9@...nel.org" <warthog9@...nel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"H. Peter Anvin" <hpa@...or.com>, Serge Hallyn <serue@...ibm.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	"mingo@...e.hu" <mingo@...e.hu>
Subject: Re: ima: use of radix tree cache indexing == massive waste of
 memory?

Hi!

> >> > Good enough as a short-term thing I guess.
> >> > 
> >> > But the memory consumption which David described is plain nuttiness
> >>and
> >> > needs to be fixed, presumably by using a more appropriate data
> >>structure
> >> > for lookups.
> >> > 
> >> > However unless I missed it, nobody has yet stated that they intend to
> >> > fix this?
> >> 
> >> I think Eric said he is going to look at it.
> >> 
> >> Cheers,
> >> 
> >> Dave.
> >
> >Am looking at it as well.
> >
> >Mimi
> 
> I'll help look into this aspect too.
> 
> To be clear (since my first post seemed to go to the moderator), we will
> be using this starting with MeeGo 1.2.  Yes, this rather pigish memory
> usage needs to be addressed.  Let's focus on fixing that.  I'd say there
> are a number of options we can explore here to do that.

Curious... I see how NSA might want to use it, but MeeGo?
									Pavel



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