From: Rusty Russell <rusty@rustcorp.com.au>
To: Arjan van de Ven <arjan@infradead.org>
Cc: Ingo Molnar <mingo@elte.hu>,
Siarhei Liakh <sliakh.lkml@gmail.com>,
linux-kernel@vger.kernel.org,
linux-security-module@vger.kernel.org,
James Morris <jmorris@namei.org>,
Andrew Morton <akpm@linux-foundation.org>, Andi Kleen <ak@muc.de>,
Thomas Gleixner <tglx@linutronix.de>,
"H. Peter Anvin" <hpa@zytor.com>,
linux-cris-kernel@axis.com
Subject: Re: [PATCH v5] RO/NX protection for loadable kernel modules
Date: Mon, 13 Jul 2009 08:51:55 +0930 [thread overview]
Message-ID: <200907130851.56161.rusty@rustcorp.com.au> (raw)
In-Reply-To: <20090712083227.39939849@infradead.org>
On Mon, 13 Jul 2009 01:02:27 am Arjan van de Ven wrote:
> Rusty Russell <rusty@rustcorp.com.au> wrote:
> > Yes, maybe that's better than kmalloc. On my laptop I have 105
> > modules loaded, with 3778464 total length: I'm wasting 206944 bytes
> > on unused tails of pages. But that's only 0.06% of my memory.
>
> 105 is also a sign that you picked a somewhat suboptimal config...
> that's of course your choice but it's a choice that has a small price,
> if you don't want to pay that price, changing the config to not be
> entirely insane is a good answer as well ;-)
To be clear: I run distro kernels on my laptop (Ubuntu in this case). I think
this is what we should be optimizing for, or we should offer the distros
something better than modules.
Cheers,
Rusty.
next prev parent reply other threads:[~2009-07-12 23:22 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-07-08 23:10 [PATCH v5] RO/NX protection for loadable kernel modules Siarhei Liakh
[not found] ` <20090710112403.GC3760@elte.hu>
[not found] ` <200907111537.03191.rusty@rustcorp.com.au>
2009-07-11 7:30 ` Ingo Molnar
2009-07-11 11:22 ` Rusty Russell
2009-07-11 8:51 ` Rusty Russell
2009-07-11 15:49 ` Arjan van de Ven
2009-07-12 4:40 ` Rusty Russell
2009-07-12 4:45 ` H. Peter Anvin
2009-07-12 7:45 ` Arjan van de Ven
2009-07-12 9:25 ` Andi Kleen
2009-07-12 9:58 ` Rusty Russell
2009-07-12 15:32 ` Arjan van de Ven
2009-07-12 17:33 ` Greg KH
2009-07-12 21:58 ` Arjan van de Ven
2009-07-12 22:14 ` Greg KH
2009-07-13 9:02 ` Andi Kleen
2009-07-12 23:21 ` Rusty Russell [this message]
2009-07-13 3:11 ` Arjan van de Ven
2009-07-12 9:24 ` Andi Kleen
2009-07-13 16:59 ` Roland Dreier
2009-07-13 10:59 ` Jesper Nilsson
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