]> git.proxmox.com Git - mirror_ubuntu-kernels.git/commit
mm/damon/paddr: fix missing folio_put()
authorandrew.yang <andrew.yang@mediatek.com>
Wed, 22 Feb 2023 06:42:20 +0000 (14:42 +0800)
committerAndrew Morton <akpm@linux-foundation.org>
Tue, 28 Feb 2023 01:00:14 +0000 (17:00 -0800)
commit3f98c9a62c338bbe06a215c9491e6166ea39bf82
treeba754c1605d61488e2534062e6249c920d0c3ed9
parent4c6759967826b87f56c73e0f1deb7b76379ccd23
mm/damon/paddr: fix missing folio_put()

damon_get_folio() would always increase folio _refcount and
folio_isolate_lru() would increase folio _refcount if the folio's lru flag
is set.

If an unevictable folio isolated successfully, there will be two more
_refcount.  The one from folio_isolate_lru() will be decreased in
folio_puback_lru(), but the other one from damon_get_folio() will be left
behind.  This causes a pin page.

Whatever the case, the _refcount from damon_get_folio() should be
decreased.

Link: https://lkml.kernel.org/r/20230222064223.6735-1-andrew.yang@mediatek.com
Fixes: 57223ac29584 ("mm/damon/paddr: support the pageout scheme")
Signed-off-by: andrew.yang <andrew.yang@mediatek.com>
Reviewed-by: SeongJae Park <sj@kernel.org>
Cc: <stable@vger.kernel.org> [5.16.x]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
mm/damon/paddr.c