From: "Zhang, Qiang" <Qiang.Zhang@windriver.com>
To: "tglx@linutronix.de" <tglx@linutronix.de>,
"elver@google.com" <elver@google.com>,
"longman@redhat.com" <longman@redhat.com>
Cc: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"akpm@linux-foundation.org" <akpm@linux-foundation.org>
Subject: 回复: [PATCH] debugobjects: install cpu hotplug callback
Date: Tue, 25 Aug 2020 04:53:21 +0000 [thread overview]
Message-ID: <BYAPR11MB263237C2A74C32CC14DD0F2EFF570@BYAPR11MB2632.namprd11.prod.outlook.com> (raw)
In-Reply-To: <20200820032453.5222-1-qiang.zhang@windriver.com>
________________________________________
发件人: linux-kernel-owner@vger.kernel.org <linux-kernel-owner@vger.kernel.org> 代表 qiang.zhang@windriver.com <qiang.zhang@windriver.com>
发送时间: 2020年8月20日 11:24
收件人: tglx@linutronix.de; elver@google.com; longman@redhat.com
抄送: linux-kernel@vger.kernel.org
主题: [PATCH] debugobjects: install cpu hotplug callback
From: Zqiang <qiang.zhang@windriver.com>
When a cpu going offline, we should free objects in "percpu_obj_pool"
free_objs list which corresponding to this cpu.
Signed-off-by: Zqiang <qiang.zhang@windriver.com>
---
include/linux/cpuhotplug.h | 1 +
lib/debugobjects.c | 23 +++++++++++++++++++++++
2 files changed, 24 insertions(+)
diff --git a/include/linux/cpuhotplug.h b/include/linux/cpuhotplug.h
index a2710e654b64..2e77db655cfa 100644
--- a/include/linux/cpuhotplug.h
+++ b/include/linux/cpuhotplug.h
@@ -36,6 +36,7 @@ enum cpuhp_state {
CPUHP_X86_MCE_DEAD,
CPUHP_VIRT_NET_DEAD,
CPUHP_SLUB_DEAD,
+ CPUHP_DEBUG_OBJ_DEAD,
CPUHP_MM_WRITEBACK_DEAD,
CPUHP_MM_VMSTAT_DEAD,
CPUHP_SOFTIRQ_DEAD,
diff --git a/lib/debugobjects.c b/lib/debugobjects.c
index fe4557955d97..50e21ed0519e 100644
--- a/lib/debugobjects.c
+++ b/lib/debugobjects.c
@@ -19,6 +19,7 @@
#include <linux/slab.h>
#include <linux/hash.h>
#include <linux/kmemleak.h>
+#include <linux/cpu.h>
#define ODEBUG_HASH_BITS 14
#define ODEBUG_HASH_SIZE (1 << ODEBUG_HASH_BITS)
@@ -433,6 +434,23 @@ static void free_object(struct debug_obj *obj)
}
}
+#if defined(CONFIG_HOTPLUG_CPU)
+static int object_cpu_offline(unsigned int cpu)
+{
+ struct debug_percpu_free *percpu_pool;
+ struct hlist_node *tmp;
+ struct debug_obj *obj;
+
+ percpu_pool = per_cpu_ptr(&percpu_obj_pool, cpu);
+ hlist_for_each_entry_safe(obj, tmp, &percpu_pool->free_objs, node) {
+ hlist_del(&obj->node);
+ kmem_cache_free(obj_cache, obj);
+ }
+
+ return 0;
+}
+#endif
+
/*
* We run out of memory. That means we probably have tons of objects
* allocated.
@@ -1367,6 +1385,11 @@ void __init debug_objects_mem_init(void)
} else
debug_objects_selftest();
+#if defined(CONFIG_HOTPLUG_CPU)
+ cpuhp_setup_state_nocalls(CPUHP_DEBUG_OBJ_DEAD, "object:offline", NULL,
+ object_cpu_offline);
+#endif
+
/*
* Increase the thresholds for allocating and freeing objects
* according to the number of possible CPUs available in the system.
--
2.17.1
next prev parent reply other threads:[~2020-08-25 4:53 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-20 3:24 [PATCH] debugobjects: install cpu hotplug callback qiang.zhang
2020-08-25 4:53 ` Zhang, Qiang [this message]
2020-08-25 22:26 ` 回复: " Waiman Long
2020-08-25 23:32 ` Waiman Long
2020-08-25 23:53 ` Thomas Gleixner
2020-08-26 0:48 ` Waiman Long
2020-08-26 8:34 ` 回复: " Zhang, Qiang
2020-08-26 9:41 ` Thomas Gleixner
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