linux-kernel - Re: [PATCH] Only show RESOURCES_64BIT on relevant architectures

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Tue, 30 Oct 2007 11:42:21 +0000
From:	Ralf Baechle <ralf@...ux-mips.org>
To:	Matthew Wilcox <matthew@....cx>
Cc:	Kumar Gala <galak@...nel.crashing.org>,
	Kyle McMartin <kyle@...artin.ca>, linux-arch@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Only show RESOURCES_64BIT on relevant architectures

On Tue, Oct 30, 2007 at 02:37:19AM -0600, Matthew Wilcox wrote:

> On Mon, Oct 29, 2007 at 10:03:16PM -0500, Kumar Gala wrote:
> > The same is true on PPC32.  Its a per platform thing.   However, I'm  
> > not sure if we could hide it from the user.  There are cases on the  
> > same HW platform that you want to run with just 32-bit phys (for  
> > performance).
> 
> Have you measured what the performance difference is?

Two identical kernel configs, one with one without CONFIG_RESOURCES_64BIT:

   text    data     bss     dec     hex filename
3334684  152208  138624 3625516  37522c vmlinux
3340352  152464  138752 3631568  3769d0 vmlinux

So that's 5668, 256 bytes data and 128 bytes of bss for a total of 6052
bytes.  Not a whole lot but I still fear some users on the most
claustrophobic systems will mind.

  Ralf
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/