Messages in this thread | | | From | Naoya Horiguchi <> | Subject | Re: [patch] mm, mempolicy: migrate_to_node should only migrate to node | Date | Fri, 27 Feb 2015 06:13:58 +0000 |
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On Tue, Feb 24, 2015 at 03:18:06PM -0800, David Rientjes wrote: > migrate_to_node() is intended to migrate a page from one source node to a > target node. > > Today, migrate_to_node() could end up migrating to any node, not only the > target node. This is because the page migration allocator, > new_node_page() does not pass __GFP_THISNODE to alloc_pages_exact_node(). > This causes the target node to be preferred but allows fallback to any > other node in order of affinity. > > Prevent this by allocating with __GFP_THISNODE. If memory is not > available, -ENOMEM will be returned as appropriate. > > Signed-off-by: David Rientjes <rientjes@google.com>
Make sense to me.
Reviewed-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
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