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| author | Vlastimil Babka <vbabka@suse.cz> | 2015-11-05 18:47:03 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-11-05 19:34:48 -0800 |
| commit | f2f81fb2b72b83b661b11da6f1b0bd3526706278 (patch) | |
| tree | 3ee1b1e964fd99a642695db8cf7d5c6823dd5f53 /mm/migrate.c | |
| parent | 35bd16a227534cb6ffc9b26a33061c2dcf91934b (diff) | |
| download | lwn-f2f81fb2b72b83b661b11da6f1b0bd3526706278.tar.gz lwn-f2f81fb2b72b83b661b11da6f1b0bd3526706278.zip | |
mm, migrate: count pages failing all retries in vmstat and tracepoint
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 <vbabka@suse.cz>
Acked-by: David Rientjes <rientjes@google.com>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
Cc: Konstantin Khlebnikov <koct9i@gmail.com>
Cc: Mel Gorman <mel@csn.ul.ie>
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 | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/mm/migrate.c b/mm/migrate.c index 842ecd7aaf7f..94961f4654b7 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -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); |