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cpuset: fix the problem that cpuset_mem_spread_node() returns an offline node

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cpuset_mem_spread_node() returns an offline node, and causes an oops.

This patch fixes it by initializing task->mems_allowed to
node_states[N_HIGH_MEMORY], and updating task->mems_allowed when doing
memory hotplug.

Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Acked-by: David Rientjes <rientjes@google.com>
Reported-by: Nick Piggin <npiggin@suse.de>
Tested-by: Nick Piggin <npiggin@suse.de>
Cc: Paul Menage <menage@google.com>
Cc: Li Zefan <lizf@cn.fujitsu.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Miao Xie 2010-03-23 13:35:34 -07:00 • committed by Linus Torvalds
parent 5574169613
commit 5ab116c934
3 changed files with 14 additions and 10 deletions
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2
init/main.c
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@ -858,7 +858,7 @@ static int __init kernel_init(void * unused)
/*
* init can allocate pages on any node
*/
set_mems_allowed(node_possible_map);
set_mems_allowed(node_states[N_HIGH_MEMORY]);
/*
* init can run on any cpu.
*/