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-next>] [day] [month] [year] [list]
Message-Id: <1351675458-11859-1-git-send-email-wency@cn.fujitsu.com>
Date:	Wed, 31 Oct 2012 17:24:17 +0800
From:	Wen Congyang <wency@...fujitsu.com>
To:	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	linux-doc@...r.kernel.org
Cc:	Rob Landley <rob@...dley.net>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Yasuaki Ishimatsu <isimatu.yasuaki@...fujitsu.com>,
	Lai Jiangshan <laijs@...fujitsu.com>,
	Jiang Liu <jiang.liu@...wei.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Minchan Kim <minchan.kim@...il.com>,
	Mel Gorman <mgorman@...e.de>,
	David Rientjes <rientjes@...gle.com>,
	Yinghai Lu <yinghai@...nel.org>,
	"rusty@...tcorp.com.au" <rusty@...tcorp.com.au>,
	Wen Congyang <wency@...fujitsu.com>
Subject: [PART6 Patch] memory-hotplug: bugfix for movable node

This patch is part6 of the following patchset:
    https://lkml.org/lkml/2012/10/29/319

The patchset is based on Linus's tree with these three patches already applied:
    https://lkml.org/lkml/2012/10/24/151
    https://lkml.org/lkml/2012/10/26/150

Part1 is here:
    https://lkml.org/lkml/2012/10/31/30

Part2 is here:
    http://marc.info/?l=linux-kernel&m=135166705909544&w=2

Part3 is here:
    http://marc.info/?l=linux-kernel&m=135167050510527&w=2

Part4 is here:
    http://marc.info/?l=linux-kernel&m=135167344211401&w=2

Part5 is here:
    http://marc.info/?l=linux-kernel&m=135167497312063&w=2

You can apply this patch without the other parts.

Issues):

mempolicy(M_BIND) don't act well when the nodemask has movable nodes only,
the kernel allocation will fail and the task can't create new task or other
kernel objects.

So we change the strategy/policy
	when the bound nodemask has movable node(s) only, we only
	apply mempolicy for userspace allocation, don't apply it
	for kernel allocation.

CPUSET also has the same problem, but the code spread in page_alloc.c,
and we doesn't fix it yet, we can/will change allocation strategy to one of
these 3 strategies:
	1) the same strategy as mempolicy
	2) change cpuset, make nodemask always has at least a normal node
	3) split nodemask: nodemask_user and nodemask_kernel

This patchset only fixes issue1.

Lai Jiangshan (1):
  mempolicy: fix is_valid_nodemask()

 mm/mempolicy.c | 36 ++++++++++++++++++++++--------------
 1 file changed, 22 insertions(+), 14 deletions(-)

-- 
1.8.0

--
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

Powered by Openwall GNU/*/Linux Powered by OpenVZ