diff options
Diffstat (limited to 'mm/backing-dev.c')
| -rw-r--r-- | mm/backing-dev.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/mm/backing-dev.c b/mm/backing-dev.c index 9c1c199f88ce..a9a08d88a745 100644 --- a/mm/backing-dev.c +++ b/mm/backing-dev.c @@ -439,10 +439,17 @@ static int bdi_forker_thread(void *ptr) break; case NO_ACTION: - if (dirty_writeback_interval) - schedule_timeout(msecs_to_jiffies(dirty_writeback_interval * 10)); + if (!wb_has_dirty_io(me) || !dirty_writeback_interval) + /* + * There are no dirty data. The only thing we + * should now care about is checking for + * inactive bdi threads and killing them. Thus, + * let's sleep for longer time, save energy and + * be friendly for battery-driven devices. + */ + schedule_timeout(bdi_longest_inactive()); else - schedule(); + schedule_timeout(msecs_to_jiffies(dirty_writeback_interval * 10)); try_to_freeze(); /* Back to the main loop */ continue; |