linux-kernel - Re: [patch] mm: speedup in __early_pfn_to

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]

Message-ID: <alpine.DEB.2.02.1303211139110.3775@chino.kir.corp.google.com>
Date:	Thu, 21 Mar 2013 11:40:33 -0700 (PDT)
From:	David Rientjes <rientjes@...gle.com>
To:	Ingo Molnar <mingo@...nel.org>
cc:	Russ Anderson <rja@....com>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, tglx@...utronix.de, mingo@...hat.com,
	hpa@...or.com
Subject: Re: [patch] mm: speedup in __early_pfn_to_nid

On Thu, 21 Mar 2013, Ingo Molnar wrote:

> > Index: linux/mm/page_alloc.c
> > ===================================================================
> > --- linux.orig/mm/page_alloc.c	2013-03-18 10:52:11.510988843 -0500
> > +++ linux/mm/page_alloc.c	2013-03-18 10:52:14.214931348 -0500
> > @@ -4161,10 +4161,19 @@ int __meminit __early_pfn_to_nid(unsigne
> >  {
> >  	unsigned long start_pfn, end_pfn;
> >  	int i, nid;
> > +	static unsigned long last_start_pfn, last_end_pfn;
> > +	static int last_nid;
> 
> Please move these globals out of function local scope, to make it more 
> apparent that they are not on-stack. I only noticed it in the second pass.
> 

The way they're currently defined places these in meminit.data as 
appropriate; if they are moved out, please make sure to annotate their 
definitions with __meminitdata.
--
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/