linux-kernel - SLAB + UML : WARNING: at mm/page

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Date:	Thu, 14 Mar 2013 20:07:52 +0100
From:	Toralf Förster <toralf.foerster@....de>
To:	linux-mm@...ck.org
CC:	user-mode-linux-user@...ts.sourceforge.net,
	Dave Jones <davej@...hat.com>,
	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: SLAB + UML : WARNING: at mm/page_alloc.c:2386

The following WARNING: can be triggered sometimes with trinity [1] under a user mode linux image
using the SLUB allocator (and not with SLAB)


2013-03-14T19:09:51.071+01:00 trinity kernel: ------------[ cut here ]------------
2013-03-14T19:09:51.071+01:00 trinity kernel: WARNING: at mm/page_alloc.c:2386 __alloc_pages_nodemask+0x153/0x750()
2013-03-14T19:09:51.071+01:00 trinity kernel: 3899fd14:  [<08342dd8>] dump_stack+0x22/0x24
2013-03-14T19:09:51.071+01:00 trinity kernel: 3899fd2c:  [<0807d0da>] warn_slowpath_common+0x5a/0x80
2013-03-14T19:09:51.071+01:00 trinity kernel: 3899fd54:  [<0807d1a3>] warn_slowpath_null+0x23/0x30
2013-03-14T19:09:51.071+01:00 trinity kernel: 3899fd64:  [<080d3213>] __alloc_pages_nodemask+0x153/0x750
2013-03-14T19:09:51.071+01:00 trinity kernel: 3899fdf0:  [<080d3838>] __get_free_pages+0x28/0x50
2013-03-14T19:09:51.071+01:00 trinity kernel: 3899fe08:  [<080fc48f>] __kmalloc_track_caller+0x3f/0x180
2013-03-14T19:09:51.071+01:00 trinity kernel: 3899fe30:  [<080dec76>] memdup_user+0x26/0x70
2013-03-14T19:09:51.071+01:00 trinity kernel: 3899fe4c:  [<080dee7e>] strndup_user+0x3e/0x60
2013-03-14T19:09:51.076+01:00 trinity kernel: 3899fe68:  [<0811b440>] copy_mount_string+0x30/0x50
2013-03-14T19:09:51.076+01:00 trinity kernel: 3899fe7c:  [<0811be0a>] sys_mount+0x1a/0xe0
2013-03-14T19:09:51.076+01:00 trinity kernel: 3899feac:  [<08062a92>] handle_syscall+0x82/0xb0
2013-03-14T19:09:51.076+01:00 trinity kernel: 3899fef4:  [<08074e7d>] userspace+0x46d/0x590
2013-03-14T19:09:51.076+01:00 trinity kernel: 3899ffec:  [<0805f7cc>] fork_handler+0x6c/0x70
2013-03-14T19:09:51.076+01:00 trinity kernel: 3899fffc:  [<5a5a5a5a>] 0x5a5a5a5a
2013-03-14T19:09:51.076+01:00 trinity kernel: 
2013-03-14T19:09:51.076+01:00 trinity kernel: ---[ end trace fd6f346f805efdbe ]---


for an UML guest (stable Gentoo x86) with kernel version 3.9-rc2-.... running at a host
which is a stable x86 Gentoo with kernel 3.7.10

The kernel config of the UML guest is attached.





[1] http://codemonkey.org.uk/
-- 
MfG/Sincerely
Toralf Förster
pgp finger print: 7B1A 07F4 EC82 0F90 D4C2 8936 872A E508 7DB6 9DA3

View attachment ".config" of type "text/plain" (22349 bytes)