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:	Mon, 2 Jul 2012 14:26:17 -0700 (PDT)
From:	David Rientjes <rientjes@...gle.com>
To:	Petr Holasek <pholasek@...hat.com>
cc:	Johannes Weiner <hannes@...xchg.org>,
	Hugh Dickins <hughd@...gle.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Andrea Arcangeli <aarcange@...hat.com>,
	Chris Wright <chrisw@...s-sol.org>,
	Izik Eidus <izik.eidus@...ellosystems.com>,
	Rik van Riel <riel@...hat.com>, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org, Anton Arapov <anton@...hat.com>
Subject: Re: [PATCH v2] KSM: numa awareness sysfs knob

On Sat, 30 Jun 2012, Petr Holasek wrote:

> The problem of the first patch/RFC was that merging algorithm was unstable
> and could merge pages with distance higher than was set up (described by 
> Nai Xia in RFC thread [1]). Sure, this instability could be solved, but for
> ksm pages shared by many other pages on different nodes we would have to still
> recalculate which page is "in the middle" and in case of change migrate it 
> between nodes every time when ksmd reach new shareable page or when some 
> sharing page is removed.
> 

Or you could simply refuse to ever merge any page that is identical to a 
page on a node with a distance greater than the threshold, i.e. never 
merge pages even under the threshold if a page exists on a node higher 
than the threshold.
--
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/

Powered by blists - more mailing lists