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| author | Bjorn Helgaas <bhelgaas@google.com> | 2013-12-05 17:37:51 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-12-07 21:14:13 -0800 |
| commit | 89c86a64cd056e283323710c9ddf6f7090a450c8 (patch) | |
| tree | 44fc2cd43f9cffc0ecfd44295b2d16411b827b1c /lib/kobject.c | |
| parent | 2322392b020badfe49730f1529b9c1a15248c387 (diff) | |
| download | lwn-89c86a64cd056e283323710c9ddf6f7090a450c8.tar.gz lwn-89c86a64cd056e283323710c9ddf6f7090a450c8.zip | |
kobject: delay kobject release for random time
When CONFIG_DEBUG_KOBJECT_RELEASE=y, delay kobject release functions for a
random time between 1 and 8 seconds, which effectively changes the order in
which they're called.
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'lib/kobject.c')
| -rw-r--r-- | lib/kobject.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/lib/kobject.c b/lib/kobject.c index b8d848fb1377..1d110dc95db5 100644 --- a/lib/kobject.c +++ b/lib/kobject.c @@ -18,6 +18,7 @@ #include <linux/export.h> #include <linux/stat.h> #include <linux/slab.h> +#include <linux/random.h> /** * kobject_namespace - return @kobj's namespace tag @@ -642,10 +643,12 @@ static void kobject_release(struct kref *kref) { struct kobject *kobj = container_of(kref, struct kobject, kref); #ifdef CONFIG_DEBUG_KOBJECT_RELEASE - pr_info("kobject: '%s' (%p): %s, parent %p (delayed)\n", - kobject_name(kobj), kobj, __func__, kobj->parent); + unsigned long delay = HZ + HZ * (get_random_int() & 0x3); + pr_info("kobject: '%s' (%p): %s, parent %p (delayed %ld)\n", + kobject_name(kobj), kobj, __func__, kobj->parent, delay); INIT_DELAYED_WORK(&kobj->release, kobject_delayed_cleanup); - schedule_delayed_work(&kobj->release, HZ); + + schedule_delayed_work(&kobj->release, delay); #else kobject_cleanup(kobj); #endif |