Messages in this thread | | | Date | Wed, 11 Dec 2013 16:00:56 +0000 | From | Christoph Lameter <> | Subject | Re: [PATCH v2 7/7] mm/migrate: remove result argument on page allocation function for migration |
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On Wed, 11 Dec 2013, Joonsoo Kim wrote:
> In do_move_pages(), if error occurs, 'goto out_pm' is executed and the > page status doesn't back to userspace. So we don't need to store err number.
If a page cannot be moved then the error code is containing the number of pages that could not be migrated. The check there is for err < 0. So a positive number is not an error.
migrate_pages only returns an error code if we are running out of memory.
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