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bh=jEjB5+SmYpe1jV4B6kvt1MmnXfzrPfDtBLhTiuYoc8Q=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=bZV5HI9ni1qoer7WyAzgqHcmDNXDCkP6yMaAYv82nIdNvytJfea+tswZdYH/n1kO3 xH7HiXbus+CJ24iXvAlS7zz0lwENIoJbFTO+7k8wHFv0svv2VFMyngh0Tua+XCQtpB 5MUrRIVoRkGncsFxs8GUMJy3gm0VfYD50LMM4KPxP9foxpkK2dCzb9KzieqYur3UTl XPZ00hyL15YOnYCbN9O6hw2aKEafU+JExRoW8OiygrC51XPE5g2gM35psx4KhXauEz q6Vsff2H6UqTxk+kbF0srjTUBtktHrEQJtd1lL1q2FnsG9HARhT4ubEgpeHNoePYL5 NZMGkA26dKDDg== From: SJ Park To: Andrew Morton Cc: SJ Park , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH REPOST 1/5] mm/damon/vaddr: support prep_probes Date: Wed, 9 Sep 2026 07:04:03 -0700 Message-ID: <20260909140408.104699-2-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260909140408.104699-1-sj@kernel.org> References: <20260909140408.104699-1-sj@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: 1416040009 X-Rspam-User: X-Stat-Signature: rsbkw7pqw9xtkefjaxibg3ifcku1kkmx X-HE-Tag: 1788962656-167991 X-HE-Meta: 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 CEzszndm DWcD256uL7kV9nm22fW3M4CrFcgi3r9GSF7Yvm5FxiSt8hJhesV8EOwyMseN9S8LhpxLx3rS+2eTlOzCXvbbqktRfh02F0bU2BPESijppDDkNKpi3+POUw8WsbEL6FkMcGpfU/ezslKGEBkXIRoFiMhwYeuboAKPTiyJr4bXHjKBU4soyTLXHcFlOSY184gjSCB/W9sE1BgQnI7fj+VD5iMtl9ctWF749T9fKv/MLqUi8A8L4n826pZTIO+y+qNyb940/ChjyPPgpzRVACM44Op4Iag== 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