Re: [RFC/PATCH] Add sysfs control to modify a user's cpu share

[Srivatsa Vaddagiri]

On Mon, Oct 01, 2007 at 04:44:02PM +0200, Ingo Molnar wrote:
> but there seems to be a bug in it, i get this:
> 
>  kobject_add failed for 500 with -EEXIST, don't try to register things with the same name in the same directory.

Looks like a remove_dir/create_dir race ..

	free_user()			alloc_uid()

	   uid_hash_remove(up);

					uid_hash_insert(new, hashent);

	   schedule_work()
					user_kobject_create();
					kobject_add();	-> Boom!

	   remove_user_sysfs_dir();

/me looks up sysfs programming examples ..

-- 
Regards,
vatsa
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