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bh=yJOHjYArtxH1+/qkwlfdh08BuCLZ4ONkiqi8cM2xmzA=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=hL5oqmRF8LzkkynQfdce6wbeYQWSDjpL6UswnKc8fc6G9J/HeoLInPWbIJB9ZikM/ ZXDvIJDC/ngOO3yqCFJr+ephAwzS2oy3Cga8BGZZErFkDCzrhS5N1N0DgrBfIjSmOG WYf6KInPrH2uRuWCksJBNd/fTIKDyX6jRU2sTtNr0wgjPiSRDEOepGRmm+1eNL+ZB0 a12wi/QRvOGNUtAu+SXzH5OFuXkNhSWCFPEROU6xn+lj298NTSKDcVPQ6RpUAov7Vl Nm7TWgaHERszU1Z5+6YX2aOoUa8pnb3Gqhxu5lKqpIJgqrYBcXOZzn6M6xhsWHDo6M M9Oa/JMhiKcsA== 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 v1.2 16/19] mm/damon/sysfs: implement probe/weight file Date: Thu, 9 Jul 2026 07:05:54 -0700 Message-ID: <20260709140600.90950-17-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260709140600.90950-1-sj@kernel.org> References: <20260709140600.90950-1-sj@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Rspamd-Server: rspam02 X-Rspamd-Queue-Id: 90CFDC0006 X-Stat-Signature: j4ypebcfab1duay3wfbm8kbcmojxqj6i X-HE-Tag: 1783605969-401878 X-HE-Meta: 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 jKPAPz4J Avj7nsRwtvndEv/Wb/SSyf1SAgjhJrmzNT7BmctiWfbYCRM2Ufnv9h+PQXsw72k7SVb+M4HS0I09ydDn77Li6vFkX/Holf1KsPcvgPBrWiEr+bejfKfLUdnrQzuLKU1ZIwkSml/IAD9XJZkDXUWcEVMLvWmoL5B6ShaFj7p3xJ3I8AkYzTHzqT0p+2dA40ozJyxo8iGBWpxbbvnA9zimiWq8taZck7Fshrfb85F9ZHVaWK40= 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