linux-kernel - Re: [PATCH] mm: meminit: Finish initialisation of struct pages before basic setup

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, 25 Jun 2015 21:57:44 +0100
From:	Mel Gorman <mgorman@...e.de>
To:	Nathan Zimmer <nzimmer@....com>
Cc:	Daniel J Blueman <daniel@...ascale.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Waiman Long <waiman.long@...com>,
	Dave Hansen <dave.hansen@...el.com>,
	Scott Norton <scott.norton@...com>,
	Linux-MM <linux-mm@...ck.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Steffen Persvold <sp@...ascale.com>
Subject: Re: [PATCH] mm: meminit: Finish initialisation of struct pages
 before basic setup

On Thu, Jun 25, 2015 at 09:48:55PM +0100, Mel Gorman wrote:
> On Wed, Jun 24, 2015 at 05:50:28PM -0500, Nathan Zimmer wrote:
> > My apologies for taking so long to get back to this.
> > 
> > I think I did locate two potential sources of slowdown.
> > One is the set_cpus_allowed_ptr as I have noted previously.
> > However I only notice that on the very largest boxes.
> > I did cobble together a patch that seems to help.
> > 
> 
> If you are using kthread_create_on_node(), is it even necessary to call
> set_cpus_allowed_ptr() at all?
> 

That aside, are you aware of any failure with this series as it currently
stands in Andrew's tree that this patch is meant to address?  It seems
like a nice follow-on that would boot faster on very large machines but
if it's addressing a regression then it's very important as the series
cannot be merged with known critical failures.

-- 
Mel Gorman
SUSE Labs
--
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/