diff options
Diffstat (limited to 'mm/page-writeback.c')
| -rw-r--r-- | mm/page-writeback.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/mm/page-writeback.c b/mm/page-writeback.c index 622a18c114ca..c518c845f202 100644 --- a/mm/page-writeback.c +++ b/mm/page-writeback.c @@ -1976,7 +1976,16 @@ int dirty_writeback_centisecs_handler(struct ctl_table *table, int write, int ret; ret = proc_dointvec(table, write, buffer, length, ppos); - if (!ret && !old_interval && dirty_writeback_interval) + + /* + * Writing 0 to dirty_writeback_interval will disable periodic writeback + * and a different non-zero value will wakeup the writeback threads. + * wb_wakeup_delayed() would be more appropriate, but it's a pain to + * iterate over all bdis and wbs. + * The reason we do this is to make the change take effect immediately. + */ + if (!ret && write && dirty_writeback_interval && + dirty_writeback_interval != old_interval) wakeup_flusher_threads(WB_REASON_PERIODIC); return ret; |