From: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
To: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
Andrew Morton <akpm@linux-foundation.org>,
Christoph Lameter <clameter@sgi.com>,
Andi Kleen <andi@firstfloor.org>
Cc: kosaki.motohiro@jp.fujitsu.com
Subject: [2.6.24-rc8-mm1][regression?] numactl --interleave=all doesn't works on memoryless node.
Date: Sat, 02 Feb 2008 17:12:30 +0900 [thread overview]
Message-ID: <20080202165054.F491.KOSAKI.MOTOHIRO@jp.fujitsu.com> (raw)
Hi
I tested numactl on 2.6.24-rc8-mm1.
and I found strange behavior.
test method and result.
$ numactl --interleave=all ls
set_mempolicy: Invalid argument
setting interleave mask: Invalid argument
numactl command download from
ftp://ftp.suse.com/pub/people/ak/numa/
(I choice numactl-1.0.2)
Of course, older kernel(RHEL5.1) works good.
more detail:
1. my machine node and memory.
$ numactl --hardware
available: 16 nodes (0-15)
node 0 size: 0 MB
node 0 free: 0 MB
node 1 size: 0 MB
node 1 free: 0 MB
node 2 size: 3872 MB
node 2 free: 1487 MB
node 3 size: 4032 MB
node 3 free: 3671 MB
node 4 size: 0 MB
node 4 free: 0 MB
node 5 size: 0 MB
node 5 free: 0 MB
node 6 size: 0 MB
node 6 free: 0 MB
node 7 size: 0 MB
node 7 free: 0 MB
node 8 size: 0 MB
node 8 free: 0 MB
node 9 size: 0 MB
node 9 free: 0 MB
node 10 size: 0 MB
node 10 free: 0 MB
node 11 size: 0 MB
node 11 free: 0 MB
node 12 size: 0 MB
node 12 free: 0 MB
node 13 size: 0 MB
node 13 free: 0 MB
node 14 size: 0 MB
node 14 free: 0 MB
node 15 size: 0 MB
node 15 free: 0 MB
2. numactl behavior of --interleave=all
2.1 scan "/sys/devices/system/node" dir
2.2 calculate max node number
2.3 all bit turn on of existing node.
(i.e. 0xFF generated on my environment.)
2.4 call set_mempolicy()
3. 2.6.24-rc8-mm1 set_mempolicy(2) behavior
3.1 check nodesubset(nodemask argument, node_states[N_HIGH_MEMORY])
in mpol_check_policy()
-> check failed when memmoryless node exist.
(i.e. node_states[N_HIGH_MEMORY] of my machine is 0xc)
4. RHEL5.1 set_mempolicy(2) behavior
4.1 check nodesubset(nodemask argument, node_online_map)
in mpol_check_policy().
-> check success.
I don't know wrong either kernel or libnuma.
Please any comments!
- kosaki
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next reply other threads:[~2008-02-02 8:12 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-02-02 8:12 KOSAKI Motohiro [this message]
2008-02-02 9:09 ` Andi Kleen
2008-02-02 9:37 ` KOSAKI Motohiro
2008-02-02 11:30 ` Andi Kleen
2008-02-04 19:03 ` Christoph Lameter
2008-02-04 18:20 ` Lee Schermerhorn
2008-02-05 9:26 ` [2.6.24 regression][BUGFIX] " KOSAKI Motohiro
2008-02-08 19:45 ` [PATCH 2.6.24-mm1] Mempolicy: silently restrict nodemask to allowed nodes V3 Lee Schermerhorn
2008-02-09 18:11 ` KOSAKI Motohiro
2008-02-10 5:29 ` KOSAKI Motohiro
2008-02-10 5:49 ` Greg KH
2008-02-10 7:42 ` Linus Torvalds
2008-02-10 10:31 ` Andrew Morton
2008-02-11 16:47 ` Lee Schermerhorn
2008-02-12 0:43 ` KOSAKI Motohiro
2008-02-12 1:00 ` David Rientjes
2008-02-12 1:56 ` KOSAKI Motohiro
2008-02-12 2:05 ` David Rientjes
2008-02-12 3:05 ` KOSAKI Motohiro
2008-02-12 3:17 ` David Rientjes
2008-02-12 15:08 ` Lee Schermerhorn
2008-02-12 19:06 ` David Rientjes
2008-02-13 0:07 ` Lee Schermerhorn
2008-02-13 0:42 ` David Rientjes
2008-02-13 16:32 ` Lee Schermerhorn
2008-02-13 18:32 ` David Rientjes
2008-02-13 18:56 ` Lee Schermerhorn
2008-02-12 4:30 ` [PATCH for 2.6.24][regression fix] " KOSAKI Motohiro
2008-02-12 5:06 ` David Rientjes
2008-02-12 5:07 ` Andrew Morton
2008-02-12 13:18 ` KOSAKI Motohiro
2008-02-05 10:17 ` [2.6.24-rc8-mm1][regression?] numactl --interleave=all doesn't works on memoryless node Paul Jackson
2008-02-05 11:14 ` KOSAKI Motohiro
2008-02-05 19:56 ` David Rientjes
2008-02-05 20:51 ` Paul Jackson
2008-02-05 21:03 ` David Rientjes
2008-02-05 21:33 ` Paul Jackson
2008-02-05 22:04 ` Lee Schermerhorn
2008-02-05 22:44 ` David Rientjes
2008-02-05 22:50 ` Paul Jackson
2008-02-05 14:31 ` Mel Gorman
2008-02-05 15:23 ` Lee Schermerhorn
2008-02-05 18:12 ` Christoph Lameter
2008-02-05 18:27 ` Lee Schermerhorn
2008-02-05 19:04 ` Christoph Lameter
2008-02-05 19:15 ` Paul Jackson
2008-02-05 20:06 ` David Rientjes
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