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bh=Rl5ADA+9J/l2w2quHKWsOoHjOvreI5jvhgmI+c48UlQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=Zn/Ucqy7kh/RrUKBA3Rnb708DRV8FvFU/uV6HVXV+JNeufRgIotpUS0FGPWf9hkH/ Nst7rRFBdIfd4aUL/BoFWMaOVI4bJzeIjlunTVfnBtjmoecShXHKCUlI1e3KMPO7yj f1k3iXAVjRted5Ig9wcmOJJVRjfApUJM0X68inisJJ62V7c+cQycx71YJFvLP9iTwY sFpb92M8/fGwEy0tbQFlGS/xmGReRSOrO/+f7rAlfUz5XOqm8+UHKY8YwiUQWGLAhK Y1nR4dsBemfJTe8IojAv9U7C2Yfsqp26qBgWgLvCDFgKpE9R6BYCsXJ9EVUMnsD4Xk Cgi6BXop3ZTKA== From: SJ Park To: Andrew Morton Cc: SJ Park , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH v1.1 12/17] mm/damon/sysfs: implement prep_action file Date: Tue, 1 Sep 2026 06:24:59 -0700 Message-ID: <20260901132506.99243-13-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260901132506.99243-1-sj@kernel.org> References: <20260901132506.99243-1-sj@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Stat-Signature: cx7b7q9fyt9xhogxhzyworw75o9tzg6i X-Rspamd-Queue-Id: 713AE180003 X-Rspamd-Server: rspam06 X-HE-Tag: 1788269119-789355 X-HE-Meta: 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 b57yPTdD 6ALEh9+96H2aXP2SCbroneDO+k3nSEk2B1D4ET/kJGZN1/yLQmF8dFCFWgnbji+SVkctlt2EdlYaOnF6Yzs7a1Ewaonnxhs1j+o1VXy2oaJohRxQxYR8TmlEuRAwaK3HUmPilaPk0I8nFqjfKalPspj2BXBBh2180At1J6iQRBeLCsyRkVhGZ7E/Kxc4a2zc99wlvtLsv0nXKQAyfYLBGKfYNiRcHyRM43SlkniG1F8WtPsnR5v6vydnaYpa7IgKsz8ZvdR8izt2exmaWVRRxl0vJXw== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Add a file named prep_action under the prep directory. It represents the corresponding probe preparation action. Signed-off-by: SJ Park --- mm/damon/sysfs.c | 57 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 57 insertions(+) diff --git a/mm/damon/sysfs.c b/mm/damon/sysfs.c index 3749abb781566..1ecf194f71ddb 100644 --- a/mm/damon/sysfs.c +++ b/mm/damon/sysfs.c @@ -755,6 +755,7 @@ static const struct kobj_type damon_sysfs_intervals_ktype = { struct damon_sysfs_prep { struct kobject kobj; + enum damon_prep_action action; }; static struct damon_sysfs_prep *damon_sysfs_prep_alloc(void) @@ -764,9 +765,61 @@ static struct damon_sysfs_prep *damon_sysfs_prep_alloc(void) prep = kzalloc_obj(struct damon_sysfs_prep); if (!prep) return prep; + prep->action = DAMON_PREP_SET_PGIDLE; return prep; } +struct damon_sysfs_prep_action_name { + const enum damon_prep_action action; + const char *name; +}; + +static const struct damon_sysfs_prep_action_name +damon_sysfs_prep_action_names[] = { + { + .action = DAMON_PREP_SET_PGIDLE, + .name = "set_pgidle", + }, +}; + +static ssize_t prep_action_show(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) +{ + struct damon_sysfs_prep *prep = container_of(kobj, + struct damon_sysfs_prep, kobj); + int i; + + for (i = 0; i < ARRAY_SIZE(damon_sysfs_prep_action_names); i++) { + const struct damon_sysfs_prep_action_name *action_name; + + action_name = &damon_sysfs_prep_action_names[i]; + if (action_name->action == prep->action) + return sysfs_emit(buf, "%s\n", action_name->name); + } + return -EINVAL; +} + +static ssize_t prep_action_store(struct kobject *kobj, + struct kobj_attribute *attr, const char *buf, size_t count) +{ + struct damon_sysfs_prep *prep = container_of(kobj, + struct damon_sysfs_prep, kobj); + ssize_t ret = -EINVAL; + int i; + + for (i = 0; i < ARRAY_SIZE(damon_sysfs_prep_action_names); i++) { + const struct damon_sysfs_prep_action_name *action_name; + + action_name = &damon_sysfs_prep_action_names[i]; + if (sysfs_streq(buf, action_name->name)) { + prep->action = action_name->action; + ret = count; + break; + } + } + return ret; +} + static void damon_sysfs_prep_release(struct kobject *kobj) { struct damon_sysfs_prep *prep = container_of(kobj, @@ -775,7 +828,11 @@ static void damon_sysfs_prep_release(struct kobject *kobj) kfree(prep); } +static struct kobj_attribute damon_sysfs_prep_prep_action_attr = + __ATTR_RW_MODE(prep_action, 0600); + static struct attribute *damon_sysfs_prep_attrs[] = { + &damon_sysfs_prep_prep_action_attr.attr, NULL, }; ATTRIBUTE_GROUPS(damon_sysfs_prep); -- 2.47.3