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Thu, 21 Aug 2025 19:05:43 +0800 From: Quanmin Yan To: CC: , , , , , , Subject: [PATCH 02/11] mm/damon/paddr: support addr_unit for access monitoring Date: Thu, 21 Aug 2025 18:51:50 +0800 Message-ID: <20250821105159.2503894-3-yanquanmin1@huawei.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250821105159.2503894-1-yanquanmin1@huawei.com> References: <20250821105159.2503894-1-yanquanmin1@huawei.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-Originating-IP: [10.50.85.135] X-ClientProxiedBy: kwepems200002.china.huawei.com (7.221.188.68) To dggpemf200018.china.huawei.com (7.185.36.31) X-Rspamd-Server: rspam03 X-Rspam-User: X-Rspamd-Queue-Id: 9AEF540009 X-Stat-Signature: 66i5zmc454fxu56qqhkos3iq1hzq68a9 X-HE-Tag: 1755774363-466920 X-HE-Meta: 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 z4fkIJpe FLKfKe4qtetUfvQysLc7lLDS9hfeGQmIuI3+kBmiLLGZuBuxQlDAjYPZD0SHWjCobGvm+hHfQLtMjH7EFN3QLZzMtvMgc43y4mLhVjNxvwCOr4K3T90OnYf5ZY0a4oya75wpZLsigwUOF7mDFzayB6TcSwdt9T1Xs44GKqD9Nhq/LjBUz9zBrn2h8vHuDDPMBZV//g+sHCv0k01XaCQuHY8pw37gJwysjEufbn/S59qIqEGCG96AOeIA0CAgJpP8JtQ7fvoDVOzq29MamS98INP/7kMF5asDmvnc66iTyvBuyqJs= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: From: SeongJae Park Add support of addr_unit paramer for access monitoing operations of paddr. Signed-off-by: SeongJae Park Signed-off-by: Quanmin Yan --- mm/damon/paddr.c | 32 +++++++++++++++++++++----------- 1 file changed, 21 insertions(+), 11 deletions(-) diff --git a/mm/damon/paddr.c b/mm/damon/paddr.c index 0b67d9321460..d497373c2bd2 100644 --- a/mm/damon/paddr.c +++ b/mm/damon/paddr.c @@ -18,7 +18,13 @@ #include "../internal.h" #include "ops-common.h" -static void damon_pa_mkold(unsigned long paddr) +static phys_addr_t damon_pa_phys_addr( + unsigned long addr, unsigned long addr_unit) +{ + return (phys_addr_t)addr * addr_unit; +} + +static void damon_pa_mkold(phys_addr_t paddr) { struct folio *folio = damon_get_folio(PHYS_PFN(paddr)); @@ -29,11 +35,12 @@ static void damon_pa_mkold(unsigned long paddr) folio_put(folio); } -static void __damon_pa_prepare_access_check(struct damon_region *r) +static void __damon_pa_prepare_access_check(struct damon_region *r, + unsigned long addr_unit) { r->sampling_addr = damon_rand(r->ar.start, r->ar.end); - damon_pa_mkold(r->sampling_addr); + damon_pa_mkold(damon_pa_phys_addr(r->sampling_addr, addr_unit)); } static void damon_pa_prepare_access_checks(struct damon_ctx *ctx) @@ -43,11 +50,11 @@ static void damon_pa_prepare_access_checks(struct damon_ctx *ctx) damon_for_each_target(t, ctx) { damon_for_each_region(r, t) - __damon_pa_prepare_access_check(r); + __damon_pa_prepare_access_check(r, ctx->addr_unit); } } -static bool damon_pa_young(unsigned long paddr, unsigned long *folio_sz) +static bool damon_pa_young(phys_addr_t paddr, unsigned long *folio_sz) { struct folio *folio = damon_get_folio(PHYS_PFN(paddr)); bool accessed; @@ -62,23 +69,25 @@ static bool damon_pa_young(unsigned long paddr, unsigned long *folio_sz) } static void __damon_pa_check_access(struct damon_region *r, - struct damon_attrs *attrs) + struct damon_attrs *attrs, unsigned long addr_unit) { - static unsigned long last_addr; + static phys_addr_t last_addr; static unsigned long last_folio_sz = PAGE_SIZE; static bool last_accessed; + phys_addr_t sampling_addr = damon_pa_phys_addr( + r->sampling_addr, addr_unit); /* If the region is in the last checked page, reuse the result */ if (ALIGN_DOWN(last_addr, last_folio_sz) == - ALIGN_DOWN(r->sampling_addr, last_folio_sz)) { + ALIGN_DOWN(sampling_addr, last_folio_sz)) { damon_update_region_access_rate(r, last_accessed, attrs); return; } - last_accessed = damon_pa_young(r->sampling_addr, &last_folio_sz); + last_accessed = damon_pa_young(sampling_addr, &last_folio_sz); damon_update_region_access_rate(r, last_accessed, attrs); - last_addr = r->sampling_addr; + last_addr = sampling_addr; } static unsigned int damon_pa_check_accesses(struct damon_ctx *ctx) @@ -89,7 +98,8 @@ static unsigned int damon_pa_check_accesses(struct damon_ctx *ctx) damon_for_each_target(t, ctx) { damon_for_each_region(r, t) { - __damon_pa_check_access(r, &ctx->attrs); + __damon_pa_check_access( + r, &ctx->attrs, ctx->addr_unit); max_nr_accesses = max(r->nr_accesses, max_nr_accesses); } } -- 2.43.0