On February 05, 2017 8:46 PM Shantanu Goel wrote: > > Hi, > Would you please reformat your patch and redeliver it after taking a look at files like linux-4.9/Documentation/SubmitChecklist linux-4.9/Documentation/SubmittingPatches thanks Hillf > On 4.9.7 kswapd is failing to wake up kcompactd due to a mismatch in the zone balance check between balance_pgdat() and > prepare_kswapd_sleep(). balance_pgdat() returns as soon as a single zone satisfies the allocation but prepare_kswapd_sleep() > requires all zones to do the same. This causes prepare_kswapd_sleep() to never succeed except in the order == 0 case and > consequently, wakeup_kcompactd() is never called. On my machine prior to apply this patch, the state of compaction from > /proc/vmstat looked this way after a day and a half of uptime: > > compact_migrate_scanned 240496 > compact_free_scanned 76238632 > compact_isolated 123472 > compact_stall 1791 > compact_fail 29 > compact_success 1762 > compact_daemon_wake 0 > > > After applying the patch and about 10 hours of uptime the state looks like this: > > compact_migrate_scanned 59927299 > compact_free_scanned 2021075136 > compact_isolated 640926 > compact_stall 4 > compact_fail 2 > compact_success 2 > compact_daemon_wake 5160 > > > Thanks, > Shantanu -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>
