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Wed, 20 Aug 2025 16:20:03 +0800 From: Quanmin Yan To: CC: , , , , , , Subject: [RFC PATCH mm-next v2 02/12] mm/damon/paddr: support addr_unit for access monitoring Date: Wed, 20 Aug 2025 16:06:12 +0800 Message-ID: <20250820080623.3799131-3-yanquanmin1@huawei.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250820080623.3799131-1-yanquanmin1@huawei.com> References: <20250820080623.3799131-1-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: rspam08 X-Rspamd-Queue-Id: 7891E140003 X-Stat-Signature: xx8o34dses1puw3un5bsgp9cbtmzkm9e X-Rspam-User: X-HE-Tag: 1755678008-935587 X-HE-Meta: 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 KFSvAc8n 7lQzuPy+4KYeVOMdrjlQjma94SBmSRIk+o+GhcCtQ3rCQbLXA4Ckci7B3UzA5749OTPgQ/z0K+sMqf14nVLmig0ZxHYD6ZlddudNCXXS1ULQC+X+b9LYzoEki4viasPoq+Zsp9H7gD4FBdIVWytoP858+tTwXEYrVB76Qqpt7K1fTgu64MAEnnRrNJnJT+Ioa4Y1gbrJnFL03nQnbqPR71WU20VDuoDf10wNi4tTWAGtP2VUh/97eyNMgys4yUBf95xyc40oQkYdgTez9L2OTaXJ+yQN/WmmVEuPp 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