linux-kernel - Re: [patch 3/3] [PATCH] prctl: Add PR_SET_MM codes to set up mm

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, 13 Dec 2011 02:05:18 +0400
From:	Cyrill Gorcunov <gorcunov@...il.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Kees Cook <keescook@...omium.org>,
	LKML <linux-kernel@...r.kernel.org>, Tejun Heo <tj@...nel.org>,
	Andrew Vagin <avagin@...nvz.org>,
	Serge Hallyn <serge.hallyn@...onical.com>,
	Vasiliy Kulikov <segoon@...nwall.com>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Alexey Dobriyan <adobriyan@...il.com>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Pavel Emelyanov <xemul@...allels.com>,
	Michael Kerrisk <mtk.manpages@...il.com>
Subject: Re: [patch 3/3] [PATCH] prctl: Add PR_SET_MM codes to set up
 mm_struct entires v3

On Tue, Dec 13, 2011 at 02:01:32AM +0400, Cyrill Gorcunov wrote:
...
> > 
> > This may not be true of all compiler versions, but when I cache
> > current->mm in a local, the code size is reduced rather a lot:
> > 
> > akpm:/usr/src/25> size kernel/sys.o
> >    text    data     bss     dec     hex filename
> >   22685   14376    7616   44677    ae85 kernel/sys.o
> >   22489   14376    7616   44481    adc1 kernel/sys.o
> > 
> 
> Hmm, this is great and weird. Letme try...
> 

Same here (gcc version 4.6.2 20111027)

   text	   data	    bss	    dec	    hex	filename
  20829	  14376	   5736	  40941	   9fed	kernel/sys.o
  20682	  14376	   5736	  40794	   9f5a	kernel/sys.o

thanks Andrew!

	Cyrill
--
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/