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author | Yisheng Xie <xieyisheng1@huawei.com> | 2018-01-31 16:16:15 -0800 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-05-30 07:50:23 +0200 |
commit | 4cf2463f8a11499e0fbb981d4e4cb8a73e01a72f (patch) | |
tree | 6e9851cdcc8b79242ca9ee7469ac59d2e4522722 /include | |
parent | 2851e3bd68de08a2cf17227ecc3aa66d6d2b039a (diff) | |
download | linux-stable-4cf2463f8a11499e0fbb981d4e4cb8a73e01a72f.tar.gz linux-stable-4cf2463f8a11499e0fbb981d4e4cb8a73e01a72f.tar.bz2 linux-stable-4cf2463f8a11499e0fbb981d4e4cb8a73e01a72f.zip |
mm/mempolicy: add nodes_empty check in SYSC_migrate_pages
[ Upstream commit 0486a38bcc4749808edbc848f1bcf232042770fc ]
As in manpage of migrate_pages, the errno should be set to EINVAL when
none of the node IDs specified by new_nodes are on-line and allowed by
the process's current cpuset context, or none of the specified nodes
contain memory. However, when test by following case:
new_nodes = 0;
old_nodes = 0xf;
ret = migrate_pages(pid, old_nodes, new_nodes, MAX);
The ret will be 0 and no errno is set. As the new_nodes is empty, we
should expect EINVAL as documented.
To fix the case like above, this patch check whether target nodes AND
current task_nodes is empty, and then check whether AND
node_states[N_MEMORY] is empty.
Link: http://lkml.kernel.org/r/1510882624-44342-4-git-send-email-xieyisheng1@huawei.com
Signed-off-by: Yisheng Xie <xieyisheng1@huawei.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Chris Salls <salls@cs.ucsb.edu>
Cc: Christopher Lameter <cl@linux.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Tan Xiaojun <tanxiaojun@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include')
0 files changed, 0 insertions, 0 deletions