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mm, migrate: count pages failing all retries in vmstat and tracepoint

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Migration tries up to 10 times to migrate pages that return -EAGAIN until
it gives up.  If some pages fail all retries, they are counted towards the
number of failed pages that migrate_pages() returns.  They should also be
counted in the /proc/vmstat pgmigrate_fail and in the mm_migrate_pages
tracepoint.

Signed-off-by: Vlastimil Babka <[email protected]>
Acked-by: David Rientjes <[email protected]>
Cc: Naoya Horiguchi <[email protected]>
Cc: "Kirill A. Shutemov" <[email protected]>
Cc: "Aneesh Kumar K.V" <[email protected]>
Cc: Konstantin Khlebnikov <[email protected]>
Cc: Mel Gorman <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Vlastimil Babka 2015-11-05 18:47:03 -08:00 • committed by Linus Torvalds
commit f2f81fb2b7
1 changed files with 2 additions and 1 deletions
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3
mm/migrate.c
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@ -1169,7 +1169,8 @@ int migrate_pages(struct list_head *from, new_page_t get_new_page,
}
}
}
rc = nr_failed + retry;
nr_failed += retry;
rc = nr_failed;
out:
if (nr_succeeded)
count_vm_events(PGMIGRATE_SUCCESS, nr_succeeded);