linux-kernel - Re: Populating multiple ptes at fault time

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:	Thu, 18 Sep 2008 16:26:44 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	"MinChan Kim" <minchan.kim@...il.com>
Cc:	"Jeremy Fitzhardinge" <jeremy@...p.org>,
	"Rik van Riel" <riel@...hat.com>,
	"Andrew Morton" <akpm@...ux-foundation.org>,
	"Nick Piggin" <nickpiggin@...oo.com.au>,
	"Hugh Dickens" <hugh@...itas.com>,
	"Linux Memory Management List" <linux-mm@...ck.org>,
	"Linux Kernel Mailing List" <linux-kernel@...r.kernel.org>,
	"Avi Kivity" <avi@...ranet.com>
Subject: Re: Populating multiple ptes at fault time

On Thu, 18 Sep 2008 08:50:05 +0900
"MinChan Kim" <minchan.kim@...il.com> wrote:

> Hi, all
> 
> I have been thinking about this idea in native.
> I didn't consider it in minor page fault.
> As you know, it costs more cheap than major fault.
> However, the page fault is one of big bottleneck on demand-paging system.
> I think major fault might be a rather big overhead in many core system.
> 
> What do you think about this idea in native ?
> Do you really think that this idea don't help much in native ?
> 
Hmm, is enlarging page-size-for-anonymous-page more difficult ?
(maybe, yes.)

> If I implement it in native, What kinds of benchmark do I need?
> Could you recommend any benchmark ?
> 

Testing some kind of scripts (shell/perl etc..) is candidates.

I use unixbench's exec/shell test to see charge/uncharge overhead of memory
resource controller, which happens at major page fault.

Thanks,
-Kame

--
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/