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b=bLiZMpGbv0SoHp/IYGQ9hEGn/GGXDcmqL6bIyyKmAQ4bHA7Jnol8zSAUHcAkKpN4V Nvg1GIsTaspSkukYRiJb3rfncFQa5eeL2tNX6pg22tC8pgzqEBVdE8MLxLFq7sSJxH pMO9JWnY35XWabkOjEfbGJ2/LzXMb9FnfJwFWunMtWk2XVf0/MhCC6ZlAiay9Xa/YE 8vkPRoNHLbWb/BY0KzL8OKsdPHw+M+g3DDRxSW9Bfl8uMG2vtI6qIKqQUV3laHGPMw zGGOKzQRLiDTwLUcBhuqhND+uLbeTkgbotGRcck+gmXZ1UDBAvjFWhZsh3/RHHDcRg Et7J7t7s+COfw== From: SJ Park To: Cc: SJ Park , Andrew Morton , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [RFC PATCH v1.3 16/19] mm/damon/sysfs: implement probe/weight file Date: Thu, 9 Jul 2026 17:23:42 -0700 Message-ID: <20260710002349.111414-17-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260710002349.111414-1-sj@kernel.org> References: <20260710002349.111414-1-sj@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Stat-Signature: cx3fcy1sn78f71fd7opao8ah4spn8x49 X-Rspamd-Queue-Id: 9DFF8A0005 X-Rspamd-Server: rspam01 X-Rspam-User: X-HE-Tag: 1783643044-737862 X-HE-Meta: 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 8K/q3mjR +4dHt4CcuQpmWK6JlfZwytEVv+cUSB+JLkhI/NHkXmx7jB7krSFJ0MkXXdfYmrV2A2iJ/J+AYvnyeFdCeDFbXciYcLrtW/YbHIgzNGUF5Jwne2jZX/SBxTvW5ODZMVdalVynNJGXXq1QeVhy5rw4cZVHm5YoZSkFEJiWV4fewOwJYTlnUMTaG/i2a5T/ZFET0DQfIwFtQvo0B9pEhwLngC9g6uCXqvSUTSiGW0FwUhg7CD+w= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Implement a new sysfs file, 'weight', under probe directory. Users will be able to set the probe weight and enable the attributes only monitoring using it. Signed-off-by: SJ Park --- mm/damon/sysfs.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) diff --git a/mm/damon/sysfs.c b/mm/damon/sysfs.c index 6d7e36c9e509d..b5fe036f78015 100644 --- a/mm/damon/sysfs.c +++ b/mm/damon/sysfs.c @@ -1065,6 +1065,7 @@ static const struct kobj_type damon_sysfs_filters_ktype = { struct damon_sysfs_probe { struct kobject kobj; + unsigned int weight; struct damon_sysfs_filters *filters; }; @@ -1100,12 +1101,35 @@ static void damon_sysfs_probe_rm_dirs(struct damon_sysfs_probe *probe) } } +static ssize_t weight_show(struct kobject *kobj, struct kobj_attribute *attr, + char *buf) +{ + struct damon_sysfs_probe *probe = container_of(kobj, + struct damon_sysfs_probe, kobj); + + return sysfs_emit(buf, "%u\n", probe->weight); +} + +static ssize_t weight_store(struct kobject *kobj, + struct kobj_attribute *attr, const char *buf, size_t count) +{ + struct damon_sysfs_probe *probe = container_of(kobj, + struct damon_sysfs_probe, kobj); + int err = kstrtouint(buf, 0, &probe->weight); + + return err ? err : count; +} + static void damon_sysfs_probe_release(struct kobject *kobj) { kfree(container_of(kobj, struct damon_sysfs_probe, kobj)); } +static struct kobj_attribute damon_sysfs_probe_weight_attr = + __ATTR_RW_MODE(weight, 0600); + static struct attribute *damon_sysfs_probe_attrs[] = { + &damon_sysfs_probe_weight_attr.attr, NULL, }; ATTRIBUTE_GROUPS(damon_sysfs_probe); @@ -1965,6 +1989,7 @@ static int damon_sysfs_set_probes(struct damon_ctx *ctx, return -ENOMEM; damon_add_probe(ctx, p); sys_probe = sys_probes->probes_arr[i]; + p->weight = sys_probe->weight; err = damon_sysfs_set_probe(p, sys_probe); if (err) return err; -- 2.47.3