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mm: migrate: Add a tracepoint for migrate_pages

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The pgmigrate_success and pgmigrate_fail vmstat counters tells the user
about migration activity but not the type or the reason. This patch adds
a tracepoint to identify the type of page migration and why the page is
being migrated.

Signed-off-by: Mel Gorman <mgorman@suse.de>
Reviewed-by: Rik van Riel <riel@redhat.com>
This commit is contained in:
Mel Gorman
2012-10-19 14:07:31 +01:00
parent 5647bc293a
commit 7b2a2d4a18
8 changed files with 82 additions and 10 deletions
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3
mm/memory-failure.c
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@ -1558,7 +1558,8 @@ int soft_offline_page(struct page *page, int flags)
page_is_file_cache(page));
list_add(&page->lru, &pagelist);
ret = migrate_pages(&pagelist, new_page, MPOL_MF_MOVE_ALL,
false, MIGRATE_SYNC);
false, MIGRATE_SYNC,
MR_MEMORY_FAILURE);
if (ret) {
putback_lru_pages(&pagelist);
pr_info("soft offline: %#lx: migration failed %d, type %lx\n",