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b=lCFQU98whh3Z83+9WS/sIOLJTtgnuUq+PXZYs5xCChKyY/Eqs6kxZmUqLRXSf2eK6 eN6urGj6dYEJS2/ncuE1JfATWN3U97Oeqeue+GZlcinVbTMFJiG4KNMXNoWR7c88M5 joOd3LCCjYi1j8iohJdvPShDaItsQ9k0PBYhX2HGFCo3XbUPm8yfyKSmw98Nd6gZvd 6xoPlgXgSV6iFf83o12lFUnz1dLKIcJmz8jZ1S/U2qFnzIYMmh3MbccCIAbfl6FBHu bDfRhUpFxARcwbA39yy9UL4JJTRt4pkTnUiPzbHjyHOPMQs7dmUcYQed6LDHgBdUy3 B1M701CGBv4+Q== 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 v1.1 13/16] mm/damon/sysfs: implement probe/weight file Date: Mon, 6 Jul 2026 07:19:07 -0700 Message-ID: <20260706141912.88445-14-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260706141912.88445-1-sj@kernel.org> References: <20260706141912.88445-1-sj@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Stat-Signature: oi61hwskk3xe7p19grjt9mk7xzp88kgr X-Rspamd-Queue-Id: 261461A000B X-Rspamd-Server: rspam01 X-Rspam-User: X-HE-Tag: 1783347565-699703 X-HE-Meta: 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 xzbfhCLb inNr3V2wnYASs7YPPxWHRiocBkurPsgL+nI/XPNbvlPHSUhWLvqjtM/ANs7ZO6tFWLgPfD2VMiF5r2UfofdReKWS+vcDwLG2w6ZO9GfgqjZovewyQj0RldWRpDxBVdln04T+2iaEfxnV5A498f457TV0scOd80hYSdSzy8WrywtyONm4x6YD3rB8tjDYvH6RGBNfwVbUHys060pxKDWqUUvEmKcbftCF5eUW9Dh8CDHyuHHQ= 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