| Message ID | 89e90b9c13566e7c28d70e5d6aa048ee3ec41757.1624028025.git.charante@codeaurora.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | mm: compaction: proactive compaction trigger by user | expand |
diff --git a/mm/compaction.c b/mm/compaction.c index 7672be3..44a232a 100644 --- a/mm/compaction.c +++ b/mm/compaction.c @@ -2928,6 +2928,8 @@ static int kcompactd(void *p) while (!kthread_should_stop()) { unsigned long pflags; + if (!sysctl_compaction_proactiveness) + timeout = MAX_SCHEDULE_TIMEOUT; trace_mm_compaction_kcompactd_sleep(pgdat->node_id); if (wait_event_freezable_timeout(pgdat->kcompactd_wait, kcompactd_work_requested(pgdat), timeout) &&
Currently, proactive compaction tries to get triggered for every HPAGE_FRAG_CHECK_INTERVAL_MSEC(=500msec) even when proactive compaction is disabled with sysctl.compaction_proactiveness = 0. This results in kcompactd thread wakes up and goes to sleep for every 500msec with out the need of doing proactive compaction. Though this doesn't have any overhead, few cpu cycles can be saved by avoid of waking up kcompactd thread for proactive compaction when it is disabled. Signed-off-by: Charan Teja Reddy <charante@codeaurora.org> --- -- Changes in V4: o No functional changes from V3. -- Changes in V3: o Fix wake up logic in proactive compaction. -- Changes in V2 through V2 doesn't exist. mm/compaction.c | 2 ++ 1 file changed, 2 insertions(+)