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Message-ID: <20071001153247.GE5724@linux.vnet.ibm.com>
Date: Mon, 1 Oct 2007 21:02:47 +0530
From: Srivatsa Vaddagiri <vatsa@...ux.vnet.ibm.com>
To: Ingo Molnar <mingo@...e.hu>
Cc: Dhaval Giani <dhaval@...ux.vnet.ibm.com>,
Mike Galbraith <efault@....de>,
Peter Zijlstra <a.p.zijlstra@...llo.nl>,
Dmitry Adamushko <dmitry.adamushko@...il.com>,
lkml <linux-kernel@...r.kernel.org>, maneesh@...ux.vnet.ibm.com,
Andrew Morton <akpm@...ux-foundation.org>,
Sudhir Kumar <skumar@...ux.vnet.ibm.com>
Subject: Re: [RFC/PATCH] Add sysfs control to modify a user's cpu share
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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