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| author | Hyeongtak Ji <[email protected]> | 2024-06-14 12:00:08 +0900 |
|---|---|---|
| committer | Andrew Morton <[email protected]> | 2024-07-03 19:30:13 -0700 |
| commit | b696722d784fb3610183281d2fd514b0efe97e3b (patch) | |
| tree | 3a8facc924e3b63c244f7a4f643f1856cea99eb7 /include/linux | |
| parent | b51820ebea656be3b48bb16dcdc5ad3f203c4fd7 (diff) | |
mm/damon/paddr: introduce DAMOS_MIGRATE_HOT action for promotion
This patch introduces DAMOS_MIGRATE_HOT action, which is similar to
DAMOS_MIGRATE_COLD, but proritizes hot pages.
It migrates pages inside the given region to the 'target_nid' NUMA node
in the sysfs.
Here is one of the example usage of this 'migrate_hot' action.
$ cd /sys/kernel/mm/damon/admin/kdamonds/<N>
$ cat contexts/<N>/schemes/<N>/action
migrate_hot
$ echo 0 > contexts/<N>/schemes/<N>/target_nid
$ echo commit > state
$ numactl -p 2 ./hot_cold 500M 600M &
$ numastat -c -p hot_cold
Per-node process memory usage (in MBs)
PID Node 0 Node 1 Node 2 Total
-------------- ------ ------ ------ -----
701 (hot_cold) 501 0 601 1101
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Hyeongtak Ji <[email protected]>
Signed-off-by: Honggyu Kim <[email protected]>
Signed-off-by: SeongJae Park <[email protected]>
Cc: Gregory Price <[email protected]>
Cc: Hyeonggon Yoo <[email protected]>
Cc: Masami Hiramatsu (Google) <[email protected]>
Cc: Mathieu Desnoyers <[email protected]>
Cc: Rakie Kim <[email protected]>
Cc: Steven Rostedt (Google) <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/damon.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/damon.h b/include/linux/damon.h index 56714b6eb0d7..3d62d98d6359 100644 --- a/include/linux/damon.h +++ b/include/linux/damon.h @@ -105,6 +105,7 @@ struct damon_target { * @DAMOS_NOHUGEPAGE: Call ``madvise()`` for the region with MADV_NOHUGEPAGE. * @DAMOS_LRU_PRIO: Prioritize the region on its LRU lists. * @DAMOS_LRU_DEPRIO: Deprioritize the region on its LRU lists. + * @DAMOS_MIGRATE_HOT: Migrate the regions prioritizing warmer regions. * @DAMOS_MIGRATE_COLD: Migrate the regions prioritizing colder regions. * @DAMOS_STAT: Do nothing but count the stat. * @NR_DAMOS_ACTIONS: Total number of DAMOS actions @@ -123,6 +124,7 @@ enum damos_action { DAMOS_NOHUGEPAGE, DAMOS_LRU_PRIO, DAMOS_LRU_DEPRIO, + DAMOS_MIGRATE_HOT, DAMOS_MIGRATE_COLD, DAMOS_STAT, /* Do nothing but only record the stat */ NR_DAMOS_ACTIONS, |