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b=GiZMyBl152MTY65nBUjhdwJYsLmBRP2br0p6tqhKfU4Zf94TVQ0K8cnr6yz9X2i5w jYHxFXwbetlDxvGFsiAwRk4++NdbCZM5eZ71DASe9PrxxF++jE+44CBtvNf9BBlfZb k1o7leRxvCtOJuPPQiMVTIYhL46W4gNYJm6SvEAQ7L8Bj1GXP3t/oUXySMKZuMUBiS w+M2K1oqeagPnvcBe5MMfgIj/FRDe4IZIslPZoXFzzozpxBuqchC/tasMz8rNoJKMV sdHxDP0g13PxCSCTFteFmcodC3fGBdzq7FSW3BGMx2UJmY3ZRPWrjtxtXaOezt7Zo8 TRywa9UoaSyFA== 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 10/17] mm/damon/sysfs: create probe preps directory Date: Sat, 25 Jul 2026 14:02:14 -0700 Message-ID: <20260725210225.129944-11-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260725210225.129944-1-sj@kernel.org> References: <20260725210225.129944-1-sj@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: BDD9B1C000A X-Stat-Signature: 7367mdii7h8i6kyxqqwbjpthu8srk57a X-Rspam-User: X-HE-Tag: 1785013358-984476 X-HE-Meta: U2FsdGVkX1/pe2f4anygpLY+UxthzCheUZro/X1wgw6Y7Pb65eANUY2xMi50Rh1Z6I7d3214ryKMuMpbVSQLRlrKoYJCTXnZTqkN40zjIFfW1fFW919j/VdrmaD2LHLacRl3bPDB8UYQPmCajifxtXF7maO4a4rZ7IvTqEOFIaCiuaeGQ0U0F3D+F9waJkD+qY2A4cVtxCq/LoURNHhFr9IZWLqozx4dumc1liKhosY/iukcRmLa9zjsX+J0hThZ6SyZxlQ6J2nUdmVKpeB3mb/8sOSnsDGB2y9C8hEYpB2yKRFx/GCVFuoxbi7lRo50DTkxqEPh8Qqa/7uwqFkZs+CszMogJ2xMFfA46wt2uOpiltX6nsPACAtHHTlbppmRbQov92CRKJ4IyS/z0+GPHMo0kuUQsUPAruPLYBoHbaNYQakXq4jb/Bsxdf437WPbjLeO98zPy8IqQ84EfE0c56vyHUa0MTUG8gaX6UK3xVVpMhlaZlCq6BLnS37CBHADMXGzEziXyzpcn/OcPkpY6xdpKpcGhAHrE6BmRsbVc3rHxmKYFsIneYNA05u+SRRdq2VcnA8+SmER9zZZ7OUF9QTikA7y3Q920bWmee8Q4LNytUKIuEfvQEYA76kUAyBhX5TJB3HcXT+sY1YDHBKQkoAC3088HZA8r++gPzJuFhvCwVDr4x8AL2tK0iovz54wJ8DVNIEOFv1AQoE1U77R55S29ThdHbirXxcitd1J1isJZDEHzZhhYGYoV0lniAKf6kCrM15U/bAmsGvo6qIfySBHdq033ipMrBujp1JWNm6W8hq2iVdtJ7IUagMAVRh006EsmgPXwq6BJ4kqWKCkumKJNA22ItXIjofTPWpNSNVJcdo8wta+RIzdI4tq+v14pg3X+EDZ99FtSHsMGPW78bUUUoXDTxDV5mk0VTKGIXPvnoXSbUG7sZeb66YROmBU57KRlm11c37tj4H064v rzmx0YCJ eWgmmofD24DPTqGhuEz/eN89gnJyGcPQSXPGNvbKPTJTsqb4JmEfEIqI+pbCOfxh/IVXVh6rXHwhPcQcMcGSEK7KwDic46N2/4+71jO95r7R/lGJU/ScbotsyA7EkS3ACaei+VLN0n612FoPoSPqmjD+U0i+zChbSsN31RTMMv7nIl68d6/5sL58QYOWvbwtID5C0ixbDbdTq6L9WZWW+W2lwudPfXpU/srjTDUBt2VaO4Mg= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Create probe preps directory when the probe directory is generated. Signed-off-by: SJ Park --- mm/damon/sysfs.c | 48 ++++++++++++++++++++++++++++++++++++++++++------ 1 file changed, 42 insertions(+), 6 deletions(-) diff --git a/mm/damon/sysfs.c b/mm/damon/sysfs.c index 7b971bfd1169f..6d3ed80fb2eb1 100644 --- a/mm/damon/sysfs.c +++ b/mm/damon/sysfs.c @@ -759,6 +759,16 @@ struct damon_sysfs_preps { int nr; }; +static struct damon_sysfs_preps *damon_sysfs_preps_alloc(void) +{ + return kzalloc_obj(struct damon_sysfs_preps); +} + +static void damon_sysfs_preps_rm_dirs(struct damon_sysfs_preps *preps) +{ + preps->nr = 0; +} + static int damon_sysfs_preps_add_dirs(struct damon_sysfs_preps *preps, int nr_preps) { @@ -1138,6 +1148,7 @@ static const struct kobj_type damon_sysfs_filters_ktype = { struct damon_sysfs_probe { struct kobject kobj; unsigned int weight; + struct damon_sysfs_preps *preps; struct damon_sysfs_filters *filters; }; @@ -1148,25 +1159,50 @@ static struct damon_sysfs_probe *damon_sysfs_probe_alloc(void) static int damon_sysfs_probe_add_dirs(struct damon_sysfs_probe *probe) { + struct damon_sysfs_preps *preps; struct damon_sysfs_filters *filters; int err; - filters = damon_sysfs_filters_alloc(); - if (!filters) + preps = damon_sysfs_preps_alloc(); + if (!preps) return -ENOMEM; + probe->preps = preps; + + err = kobject_init_and_add(&preps->kobj, &damon_sysfs_preps_ktype, + &probe->kobj, "preps"); + if (err) + goto put_preps_out; + + filters = damon_sysfs_filters_alloc(); + if (!filters) { + err = -ENOMEM; + goto del_preps_out; + } probe->filters = filters; err = kobject_init_and_add(&filters->kobj, &damon_sysfs_filters_ktype, &probe->kobj, "filters"); - if (err) { - kobject_put(&filters->kobj); - probe->filters = NULL; - } + if (err) + goto put_filters_out; + return err; + +put_filters_out: + kobject_put(&filters->kobj); + probe->filters = NULL; +del_preps_out: + kobject_del(&preps->kobj); +put_preps_out: + kobject_put(&preps->kobj); + probe->preps = NULL; return err; } static void damon_sysfs_probe_rm_dirs(struct damon_sysfs_probe *probe) { + if (probe->preps) { + damon_sysfs_preps_rm_dirs(probe->preps); + kobject_put(&probe->preps->kobj); + } if (probe->filters) { damon_sysfs_filters_rm_dirs(probe->filters); kobject_put(&probe->filters->kobj); -- 2.47.3