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b=NJk5Scv9CzNpnPdfFDYVeiMuJG6fb1OTCsPDbcrJrCLAVbnOKNEhP8f7WlAsmguc3 vtXxF0X1kzcPVOOLVsCcfBY8skt6XdfaN9iVNlcaNzulG4EmUU+z3I4eguPILVCDM+ 6XJNAn7l2GgFqYlZ44YIHUjYmkoLyCiR3Q8qAywyFxOIa6UoeW8ESkWExeaf3mLRz4 c0NPQAFyCZYAiYj0lXSXdkzkoEp/6/2qEmNR4VoZrRTqJHoVHLatp9CQ9Go6Fvkpyx WaRo1RksJrwB2IEL9eicdFbmVggg/PM9OUc8/tYGJZX0g0ahJknd1fgigsOZwu7LIr QRwcv52EWdXWQ== From: SJ Park To: Andrew Morton Cc: SJ Park , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH 16/19] mm/damon/sysfs: implement probe/weight file Date: Fri, 10 Jul 2026 06:46:45 -0700 Message-ID: <20260710134651.18084-17-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260710134651.18084-1-sj@kernel.org> References: <20260710134651.18084-1-sj@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: 414134000A X-Stat-Signature: uxcxrehm6zg14pwdmsr5gauouoh8fkxq X-HE-Tag: 1783691226-163426 X-HE-Meta: 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 /cy0KEdP fMj+kdptHVE+3Ws70hB3oTJk6oUkkrFb0EqGG7l4bt+Kf1ycBenmtdxGBNTFlicF9ZsgizMCHX7csQm7z7UX2PfKpo1sAL/yhH2KG1CHOm36eHepdHLMgQflSaIlynma0/A6RgVqn8xYcI3k9HGPIsE/5lIbHA9o0jJj3OQ13oh9p5KzfbHIp0FLAxKmGyCFNTW4qHjYfBE3OcproLLjcZvS3XnfrLNUdPSyG5U2utaP112Mkl2j4rsWOTpTcquOFw3AC4FglD961KWUBwHD4v8PCLf0djS5U4SzWAej0gTEir5ScJChoJMBb/P+xiEsLEZcS 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