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mm/migrate: add comment about permanent failure path

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Let's add a comment about where the failed page goes to, which makes
code more readable.

Signed-off-by: Naoya Horiguchi <[email protected]>
Signed-off-by: Joonsoo Kim <[email protected]>
Acked-by: Christoph Lameter <[email protected]>
Reviewed-by: Wanpeng Li <[email protected]>
Acked-by: Rafael Aquini <[email protected]>
Cc: Vlastimil Babka <[email protected]>
Cc: Wanpeng Li <[email protected]>
Cc: Mel Gorman <[email protected]>
Cc: Rik van Riel <[email protected]>
Cc: Vlastimil Babka <[email protected]>
Cc: Zhang Yanfei <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Naoya Horiguchi 2014-01-21 15:51:14 -08:00 • committed by Linus Torvalds
commit 354a336336
1 changed files with 6 additions and 1 deletions
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7
mm/migrate.c
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@ -1125,7 +1125,12 @@ int migrate_pages(struct list_head *from, new_page_t get_new_page,
nr_succeeded++;
break;
default:
/* Permanent failure */
/*
* Permanent failure (-EBUSY, -ENOSYS, etc.):
* unlike -EAGAIN case, the failed page is
* removed from migration page list and not
* retried in the next outer loop.
*/
nr_failed++;
break;
}