mm: shrink_inactive_list() nr_scan accounting fix fix
If sc->isolate_pages() return 0, we don't need to call shrink_page_list().
In past days, shrink_inactive_list() handled it properly.
But commit fb8d14e1 (three years ago commit!) breaked it. current
shrink_inactive_list() always call shrink_page_list() although
isolate_pages() return 0.
This patch restore proper return value check.
Requirements:
o "nr_taken == 0" condition should stay before calling shrink_page_list().
o "nr_taken == 0" condition should stay after nr_scan related statistics
modification.
Cc: Wu Fengguang <fengguang.wu@intel.com>
Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Reviewed-by: Rik van Riel <riel@redhat.com>
Reviewed-by: Minchan Kim <minchan.kim@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
1 file changed