diff options
| author | Yunjeong Mun <yunjeong.mun@sk.com> | 2025-07-08 02:59:18 +0300 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2025-07-20 04:59:47 +0300 |
| commit | 749cc6533b662166fb387486e408e581a87b2a34 (patch) | |
| tree | 9ecf4e693e54eb23689b42de9507a45135261571 /samples | |
| parent | 793020545cea0c9e2a79de6ad5c9746ec4f5bd7e (diff) | |
| download | linux-749cc6533b662166fb387486e408e581a87b2a34.tar.xz | |
samples/damon: support automatic node address detection
This patch adds a new knob `detect_node_addresses`, which determines
whether the physical address range is set manually using the existing
knobs or automatically by the mtier module. When `detect_node_addresses`
set to 'Y', mtier automatically converts node0 and node1 to their physical
addresses. If set to 'N', it uses the existing 'node#_start_addr' and
'node#_end_addr' to define regions as before.
Link: https://lkml.kernel.org/r/20250707235919.513-1-yunjeong.mun@sk.com
Signed-off-by: Yunjeong Mun <yunjeong.mun@sk.com>
Suggested-by: Honggyu Kim <honggyu.kim@sk.com>
Reviewed-by: SeongJae Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'samples')
| -rw-r--r-- | samples/damon/mtier.c | 37 |
1 files changed, 34 insertions, 3 deletions
diff --git a/samples/damon/mtier.c b/samples/damon/mtier.c index 42e14df16f44..7ebd352138e4 100644 --- a/samples/damon/mtier.c +++ b/samples/damon/mtier.c @@ -47,8 +47,29 @@ static bool enabled __read_mostly; module_param_cb(enabled, &enabled_param_ops, &enabled, 0600); MODULE_PARM_DESC(enabled, "Enable or disable DAMON_SAMPLE_MTIER"); +static bool detect_node_addresses __read_mostly; +module_param(detect_node_addresses, bool, 0600); + static struct damon_ctx *ctxs[2]; +struct region_range { + phys_addr_t start; + phys_addr_t end; +}; + +static int nid_to_phys(int target_node, struct region_range *range) +{ + if (!node_online(target_node)) { + pr_err("NUMA node %d is not online\n", target_node); + return -EINVAL; + } + + range->start = PFN_PHYS(node_start_pfn(target_node)); + range->end = PFN_PHYS(node_end_pfn(target_node)); + + return 0; +} + static struct damon_ctx *damon_sample_mtier_build_ctx(bool promote) { struct damon_ctx *ctx; @@ -58,6 +79,8 @@ static struct damon_ctx *damon_sample_mtier_build_ctx(bool promote) struct damos *scheme; struct damos_quota_goal *quota_goal; struct damos_filter *filter; + struct region_range addr; + int ret; ctx = damon_new_ctx(); if (!ctx) @@ -87,9 +110,17 @@ static struct damon_ctx *damon_sample_mtier_build_ctx(bool promote) if (!target) goto free_out; damon_add_target(ctx, target); - region = damon_new_region( - promote ? node1_start_addr : node0_start_addr, - promote ? node1_end_addr : node0_end_addr); + + if (detect_node_addresses) { + ret = promote ? nid_to_phys(1, &addr) : nid_to_phys(0, &addr); + if (ret) + goto free_out; + } else { + addr.start = promote ? node1_start_addr : node0_start_addr; + addr.end = promote ? node1_end_addr : node0_end_addr; + } + + region = damon_new_region(addr.start, addr.end); if (!region) goto free_out; damon_add_region(region, target); |