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Fri, 22 Aug 2025 17:48:06 +0800 From: Quanmin Yan To: CC: , , , , , , Subject: [PATCH v2 02/11] mm/damon/paddr: support addr_unit for access monitoring Date: Fri, 22 Aug 2025 17:34:10 +0800 Message-ID: <20250822093420.2103803-3-yanquanmin1@huawei.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250822093420.2103803-1-yanquanmin1@huawei.com> References: <20250822093420.2103803-1-yanquanmin1@huawei.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-Originating-IP: [10.50.85.135] X-ClientProxiedBy: kwepems500002.china.huawei.com (7.221.188.17) To dggpemf200018.china.huawei.com (7.185.36.31) X-Rspamd-Server: rspam07 X-Rspamd-Queue-Id: B636940004 X-Stat-Signature: 16r9huen7ma8fy67erug7neh6qcz3bkm X-Rspam-User: X-HE-Tag: 1755856090-496106 X-HE-Meta: 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 upOJSKB7 Gqh+qbg5tgk2vhqzs30cqHRkShDbfiiYFgXLh8+koiRv0ecaIo8/ROcCCgwdFvfs5dziU8Vpw2Cl4don5h//N+E+UPsIn1JaVfdAfEmEXvmYXh6ZEayINqKO/ay/Tnn+WNgdNwiHRIhuShBDK9VT0T5PrKtYLed7KSDIU6lewkalZekiE6c0mdKVNeapz6WYDIQljUWIhsJ6DomLE+Bsi/sgs1VNKkuGAn/XnINxD2XBbUewNJ4dSdY/3RbgQA1CWZfB/m5ngFOuIVAF/L6ld72hGPdnITUz+BjmC2LwxKBahANI= 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 Reviewed-by: SeongJae Park --- 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