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b=ShoWSbxe/VvRANS1E4btJRQii4QhZd4/DyUYBSCTQIJf+/FMvp59isNQLoZyRyWt0 /wRnFM9kYrcNo+SdHTDNCzwhIYfMoH/Opof0rlgrAxwNB7U4E+vdyPYfjgJ3R13Hwb /OVKiFSvOuap6k0V6h/XNSqen2Gt98MzZkp9J/7vJCtSWZFqSVQ1hDNcsvjWW92eN4 1tk38a9xbnwiNQErYYyxtmHetcl99oox3epZiEWoElrPgQZbZf+lIN/l6xeis+GEZ+ HikmhBENmXwOZk3CbzDeLf/UpEF8EJOtrDrmnls8ylJgkXQ5xH8c4wVMvTHHvCo6Ok wuljHjyCK4eRg== From: SeongJae Park To: Andrew Morton Cc: SeongJae Park , Quanmin Yan , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org, wangkefeng.wang@huawei.com, zuoze1@huawei.com Subject: [PATCH v3 02/11] mm/damon/paddr: support addr_unit for access monitoring Date: Thu, 28 Aug 2025 10:12:33 -0700 Message-Id: <20250828171242.59810-3-sj@kernel.org> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20250828171242.59810-1-sj@kernel.org> References: <20250828171242.59810-1-sj@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam03 X-Rspam-User: X-Rspamd-Queue-Id: B56CC40019 X-Stat-Signature: andwe5dyu9sb3cxxrr81yjacpmaefj4q X-HE-Tag: 1756401170-954901 X-HE-Meta: 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 pFDVJxLB F6wdxwJOSCZMNGXuif6RcRY2Srp4sSXf7VdP5ZUUq9mYpMsnkUfJJr5e7vVAs+xn6MmlXKB+F0PXSCtqriHhw+HXoV63YqdfDujarm6sgnDlD4b7/YacSDnY8Y32gw54VtG55Y5fQA+Nb/VzA9XLe84ezEmfitai3buz+mgOOUsHHQcsQrV6iycwlAES7MhCGrSJbLEwqrWhLcTVCG4nfwigWsRyltkTscMUwa+pY9JVK62lXaj9AIXFobmGJt7MnzGaI05r3fBSLIf6UmXsZsLZATYH7Ec1DRY/nSnMMA49o8MokZSqzZWdenFjrIIqDgmHelKvBDOG+A88/0NeUQKoERg== 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: 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); } } -- 2.39.5