[PATCH REPOST 1/5] mm/damon/vaddr: support prep_probes
flat view
COLD26d
IN LINUX-NEXT
From: SJ Park <sj@kernel.org>
Date: 2026-09-09 14:04:22
Also in:
damon, lkml
Subsystem:
damon, memory management, the rest · Maintainers:
SJ Park, Andrew Morton, Linus Torvalds
Revision v1 of 2 in this series; queued in linux-next as 569553fe8829 on 2026-10-05.
Revisions (2)
- rfc [diff vs current]
- v1 current
DAMON virtual address space operation set (vaddr) is not supporting prep_probes. Add the support. Signed-off-by: SJ Park <sj@kernel.org> --- mm/damon/vaddr.c | 40 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+)
diff --git a/mm/damon/vaddr.c b/mm/damon/vaddr.c
index af9e1b82454cc..20f4784f17817 100644
--- a/mm/damon/vaddr.c
+++ b/mm/damon/vaddr.c@@ -483,6 +483,45 @@ static unsigned int damon_va_check_accesses(struct damon_ctx *ctx) return max_nr_accesses; } +static void damon_va_prep_probe_region(struct damon_ctx *ctx, + struct mm_struct *mm, struct damon_region *r, + struct damon_probe *probe) +{ + struct damon_prep *p; + + damon_for_each_prep(p, probe) { + switch (p->action) { + case DAMON_PREP_SET_PGIDLE: + damon_va_mkold(mm, r->sampling_addr); + break; + default: + break; + } + } +} + +static void damon_va_prep_probes(struct damon_ctx *ctx, bool set_samples) +{ + struct damon_target *t; + struct mm_struct *mm; + struct damon_region *r; + struct damon_probe *p; + + damon_for_each_target(t, ctx) { + mm = damon_get_mm(t); + if (!mm) + continue; + damon_for_each_region(r, t) { + if (set_samples) + r->sampling_addr = damon_rand(ctx, r->ar.start, + r->ar.end); + damon_for_each_probe(p, ctx) + damon_va_prep_probe_region(ctx, mm, r, p); + } + mmput(mm); + } +} + static bool damos_va_filter_young_match(struct damos_filter *filter, struct folio *folio, struct vm_area_struct *vma, unsigned long addr, pte_t *ptep, pmd_t *pmdp)
@@ -911,6 +950,7 @@ static int __init damon_va_initcall(void) .update = damon_va_update, .prepare_access_checks = damon_va_prepare_access_checks, .check_accesses = damon_va_check_accesses, + .prep_probes = damon_va_prep_probes, .target_valid = damon_va_target_valid, .cleanup_target = damon_va_cleanup_target, .apply_scheme = damon_va_apply_scheme,
--
2.47.3