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| author | Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com> | 2013-04-30 02:08:16 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-04-30 02:54:37 +0400 |
| commit | c73e5c9c59a0f7ba30b3e5f7bd2d8097d4c89c6d (patch) | |
| tree | 00358e655740230b103854f581d00c58a691a866 /mm/migrate.c | |
| parent | 52f37629fd3c7b24e1e6c125e665454cd7ac1acb (diff) | |
| download | linux-c73e5c9c59a0f7ba30b3e5f7bd2d8097d4c89c6d.tar.xz | |
mm: rewrite the comment over migrate_pages() more comprehensibly
The comment over migrate_pages() looks quite weird, and makes it hard to
grasp what it is trying to say. Rewrite it more comprehensibly.
Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Acked-by: Christoph Lameter <cl@linux.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/migrate.c')
| -rw-r--r-- | mm/migrate.c | 22 |
1 files changed, 13 insertions, 9 deletions
diff --git a/mm/migrate.c b/mm/migrate.c index c87ef9207853..27ed22579fd9 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -973,19 +973,23 @@ out: } /* - * migrate_pages + * migrate_pages - migrate the pages specified in a list, to the free pages + * supplied as the target for the page migration * - * The function takes one list of pages to migrate and a function - * that determines from the page to be migrated and the private data - * the target of the move and allocates the page. + * @from: The list of pages to be migrated. + * @get_new_page: The function used to allocate free pages to be used + * as the target of the page migration. + * @private: Private data to be passed on to get_new_page() + * @mode: The migration mode that specifies the constraints for + * page migration, if any. + * @reason: The reason for page migration. * - * The function returns after 10 attempts or if no pages - * are movable anymore because to has become empty - * or no retryable pages exist anymore. - * Caller should call putback_lru_pages to return pages to the LRU + * The function returns after 10 attempts or if no pages are movable any more + * because the list has become empty or no retryable pages exist any more. + * The caller should call putback_lru_pages() to return pages to the LRU * or free list only if ret != 0. * - * Return: Number of pages not migrated or error code. + * Returns the number of pages that were not migrated, or an error code. */ int migrate_pages(struct list_head *from, new_page_t get_new_page, unsigned long private, enum migrate_mode mode, int reason) |