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b=j8NOewHFOLvGTEYMvInpqpNqWqgOutYCTrLtaJbMOQ0c6Kv+ulJX47s6aHjniDJf9 hGqEzySajML7VpB2LxEjY0rzYfF12PeIlBHsUtP98bth/cQDA4wWWVwrMQyXiD5+0n JX/PwHr0OxVKphCAsnkjA8tFlrgC495L3qwcvg/mbvaoFQn6dE03iv10sHABYB/Pia K7F2zp2RB9QZ/RrBHzvMp33QplPQHAOdtqMaAZmxz1DDmsKLcjot7sq9F5+xSBu21/ Jp7VEdAd8VWKYYkOaxiRjHyqPQJSEuvAwDE8bTECGzJCLPkQFXZbNQpPu9dYQzL411 OsnjI61STtyCg== From: SJ Park To: Andrew Morton Cc: SJ Park , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH 1/5] mm/damon/vaddr: support prep_probes Date: Sun, 6 Sep 2026 11:44:11 -0700 Message-ID: <20260906184417.96621-2-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260906184417.96621-1-sj@kernel.org> References: <20260906184417.96621-1-sj@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: A48AA1A0008 X-Stat-Signature: 1twnwzby79msik4g6nojgmxeou7fn4r4 X-Rspam-User: X-HE-Tag: 1788720265-628287 X-HE-Meta: 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 WU2ygIKu zqUKuh1GGQQr0tLW6VRD3+2jpu6f3kxdm/n/P3JFQuvIOUvADlsGinDS3kIRTscQ3Nm8Uv2UXIrm8yiewE8NcEYSACWS9LTQi1jwbIhUg6RJ/ObNjfBZkiehzUIyW8g5+i+LY3uRUQmpvtvLfqkdQ2X7Zy6jBuu2DoLfbdDzj8KB9/oIVQcuiOvak2xxdFW4UAKMVOrWypv9IIH7eSZ9GXZDffGTMGZd35gCiQ2LuMn2JCFxq+MOBKh9unGFMwZPyKAY182HTHV+1q0MGnsY4I3AMjA== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: DAMON virtual address space operation set (vaddr) is not supporting prep_probes. Add the support. Signed-off-by: SJ Park --- 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