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b=CnTw+psWl8aAIVYof592X9ltj79ixjRksFlUcDFybT/C6QT2R2sbnm3AxFn1pR3o7 OzbY23Ixwq4WX/1PGbQz/OX5w+x0VxoPXNhppwDvNFK3P37PgEjHP/BxYHsbDXDAST U/TW5Wm9RS3HuiaaPtcYlya0QIBrgWWg+pExCZWd52QbUmGH/aYLjh+ekFGKGBSlAH py3vdGmOoFW7Ha48wm9YpXVhnISzH6Btws5rRhpSNK8YKVOt2VlWJWziWeCvUNVkgg /Smgt+0dqFKVUSt+EfZ5F4x3qXV/P2iWuyHqfGsy3ehDtgJ4Kbh18nEIaeEA8FwGGD xTsZRBYdnDSaA== From: SeongJae Park To: Cc: SeongJae Park , Andrew Morton , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [RFC PATCH 5/7] mm/damon/stat: use damon_set_region_system_rams_default() Date: Tue, 14 Apr 2026 18:20:33 -0700 Message-ID: <20260415012048.76508-6-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260415012048.76508-1-sj@kernel.org> References: <20260415012048.76508-1-sj@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: 65129160003 X-Stat-Signature: q5w8h9uouk4b1tmmoeiqtwmfmwuommhg X-HE-Tag: 1776216059-369241 X-HE-Meta: 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 Qf1xBVWK mi+KPwrInLFqoIEN4VRDrp2PZ867V29TUWryOirysiVm5zxu+NyXZ4WP+075potmLZyZMaNSBQVW8Tsg8ttSs7aiASzmqZuzk/g75vr0R++U6+XQ8Ze2s5JPtVT/+zLJmnnazqVxuAwGZ+fqHA3fX7CvCPUcY/N/wxEMpYvpcaX19qo1rdSPRrmPGQZ6fUYvM2CHYU/+TTcAeTUVkSx2tjZ0YqLvrcuRn+iiK5f4GCKGN15wmTZWWsI6kb0zq4ldivfgEfWZbQV7trZf9+fEqRWxtJg== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: damon_stat_set_moniotirng_region() is nearly a duplicate of the core function, damon_set_region_system_rams_default(). Use the core implementation. Signed-off-by: SeongJae Park --- mm/damon/stat.c | 53 +++---------------------------------------------- 1 file changed, 3 insertions(+), 50 deletions(-) diff --git a/mm/damon/stat.c b/mm/damon/stat.c index 4901e9a7c3398..da2ebf90ef64e 100644 --- a/mm/damon/stat.c +++ b/mm/damon/stat.c @@ -154,59 +154,12 @@ static int damon_stat_damon_call_fn(void *data) return 0; } -struct damon_stat_system_ram_range_walk_arg { - bool walked; - struct resource res; -}; - -static int damon_stat_system_ram_walk_fn(struct resource *res, void *arg) -{ - struct damon_stat_system_ram_range_walk_arg *a = arg; - - if (!a->walked) { - a->walked = true; - a->res.start = res->start; - } - a->res.end = res->end; - return 0; -} - -static unsigned long damon_stat_res_to_core_addr(resource_size_t ra, - unsigned long addr_unit) -{ - /* - * Use div_u64() for avoiding linking errors related with __udivdi3, - * __aeabi_uldivmod, or similar problems. This should also improve the - * performance optimization (read div_u64() comment for the detail). - */ - if (sizeof(ra) == 8 && sizeof(addr_unit) == 4) - return div_u64(ra, addr_unit); - return ra / addr_unit; -} - -static int damon_stat_set_monitoring_region(struct damon_target *t, - unsigned long addr_unit, unsigned long min_region_sz) -{ - struct damon_addr_range addr_range; - struct damon_stat_system_ram_range_walk_arg arg = {}; - - walk_system_ram_res(0, -1, &arg, damon_stat_system_ram_walk_fn); - if (!arg.walked) - return -EINVAL; - addr_range.start = damon_stat_res_to_core_addr( - arg.res.start, addr_unit); - addr_range.end = damon_stat_res_to_core_addr( - arg.res.end + 1, addr_unit); - if (addr_range.end <= addr_range.start) - return -EINVAL; - return damon_set_regions(t, &addr_range, 1, min_region_sz); -} - static struct damon_ctx *damon_stat_build_ctx(void) { struct damon_ctx *ctx; struct damon_attrs attrs; struct damon_target *target; + unsigned long start = 0, end = 0; ctx = damon_new_ctx(); if (!ctx) @@ -236,8 +189,8 @@ static struct damon_ctx *damon_stat_build_ctx(void) if (!target) goto free_out; damon_add_target(ctx, target); - if (damon_stat_set_monitoring_region(target, ctx->addr_unit, - ctx->min_region_sz)) + if (damon_set_region_system_rams_default(target, &start, &end, + ctx->addr_unit, ctx->min_region_sz)) goto free_out; return ctx; free_out: -- 2.47.3