linux-kernel - Re: [PATCH] replace various uses of num_physpages by totalram

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, 18 Aug 2009 17:38:15 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Jan Beulich <JBeulich@...ell.com>
Cc:	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	Rusty Russell <rusty@...tcorp.com.au>
Subject: Re: [PATCH] replace various uses of num_physpages by totalram_pages


* Jan Beulich <JBeulich@...ell.com> wrote:

> Sizing of memory allocations shouldn't depend on the number of 
> physical pages found in a system, as that generally includes 
> (perhaps a huge amount of) non-RAM pages. The amount of what 
> actually is usable as storage should instead be used as a basis 
> here.
> 
> Some of the calculations (i.e. those not intending to use high 
> memory) should likely even use (totalram_pages - 
> totalhigh_pages).
> 
> Signed-off-by: Jan Beulich <jbeulich@...ell.com>
> Acked-by: Rusty Russell <rusty@...tcorp.com.au>
> 
> ---
>  arch/x86/kernel/microcode_core.c  |    4 ++--

Acked-by: Ingo Molnar <mingo@...e.hu>

Just curious: how did you find this bug? Did you find this by 
experiencing problems on a system with a lot of declared non-RAM 
memory?

	Ingo
--
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/