diff options
| author | Yunjeong Mun <yunjeong.mun@sk.com> | 2025-06-27 09:33:29 -0700 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2025-07-13 16:38:19 -0700 |
| commit | c5e67d40a10234541e220750297304df79aaedd0 (patch) | |
| tree | 5e223b3908fbfe18c2bd4c838b9ee83ed9891bbe | |
| parent | d1554fb6302093d353c8bf4601f9bf994b836904 (diff) | |
samples/damon/mtier: add parameters for node0 memory usage
Change the hard-coded quota goal metric values into sysfs knobs:
`node0_mem_used_bp` and `node0_mem_free_bp`. These knobs represent the
used and free memory ratio of node0 in basis points (bp, where 1 bp =
0.01%). As mentioned in [1], this patch is developed under the assumption
that node0 is always the fast-tier in a two-tiers memory setup.
[1] https://lore.kernel.org/linux-mm/20250420194030.75838-8-sj@kernel.org/
Link: https://lkml.kernel.org/r/20250627163329.50997-1-sj@kernel.org
Link: https://patch.msgid.link/20250619050313.1535-1-yunjeong.mun@sk.com
Signed-off-by: Yunjeong Mun <yunjeong.mun@sk.com>
Signed-off-by: SeongJae Park <sj@kernel.org>
Suggested-by: Honggyu Kim <honggyu.kim@sk.com>
Reviewed-by: SeongJae Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| -rw-r--r-- | samples/damon/mtier.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/samples/damon/mtier.c b/samples/damon/mtier.c index c94254b77fc9..97892ade7f31 100644 --- a/samples/damon/mtier.c +++ b/samples/damon/mtier.c @@ -24,6 +24,12 @@ module_param(node1_start_addr, ulong, 0600); static unsigned long node1_end_addr __read_mostly; module_param(node1_end_addr, ulong, 0600); +static unsigned long node0_mem_used_bp __read_mostly = 9970; +module_param(node0_mem_used_bp, ulong, 0600); + +static unsigned long node0_mem_free_bp __read_mostly = 50; +module_param(node0_mem_free_bp, ulong, 0600); + static int damon_sample_mtier_enable_store( const char *val, const struct kernel_param *kp); @@ -112,7 +118,7 @@ static struct damon_ctx *damon_sample_mtier_build_ctx(bool promote) quota_goal = damos_new_quota_goal( promote ? DAMOS_QUOTA_NODE_MEM_USED_BP : DAMOS_QUOTA_NODE_MEM_FREE_BP, - promote ? 9970 : 50); + promote ? node0_mem_used_bp : node0_mem_free_bp); if (!quota_goal) goto free_out; quota_goal->nid = 0; |