diff options
| author | Jan Kara <jack@suse.cz> | 2018-12-28 00:39:01 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-12-28 12:11:51 -0800 |
| commit | 0b3901b38d9d916f634e903ce7cd2a8ddd5b1559 (patch) | |
| tree | 08163d6373d56829d80a1ea60651017d041698d0 /mm/page_isolation.c | |
| parent | d9367bd06faa1beb2951899272f925bdf877d28b (diff) | |
mm: migration: factor out code to compute expected number of page references
Patch series "mm: migrate: Fix page migration stalls for blkdev pages".
This patchset deals with page migration stalls that were reported by our
customer due to a block device page that had a bufferhead that was in the
bh LRU cache.
The patchset modifies the page migration code so that bufferheads are
completely handled inside buffer_migrate_page() and then provides a new
migration helper for pages with buffer heads that is safe to use even for
block device pages and that also deals with bh lrus.
This patch (of 6):
Factor out function to compute number of expected page references in
migrate_page_move_mapping(). Note that we move hpage_nr_pages() and
page_has_private() checks from under xas_lock_irq() however this is safe
since we hold page lock.
[jack@suse.cz: fix expected_page_refs()]
Link: http://lkml.kernel.org/r/20181217131710.GB8611@quack2.suse.cz
Link: http://lkml.kernel.org/r/20181211172143.7358-2-jack@suse.cz
Signed-off-by: Jan Kara <jack@suse.cz>
Acked-by: Mel Gorman <mgorman@suse.de>
Cc: Michal Hocko <mhocko@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/page_isolation.c')
0 files changed, 0 insertions, 0 deletions