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From: Pavel Emelyanov <xemul@openvz.org>
To: Alan Stern <stern@rowland.harvard.edu>
Cc: Duncan Sands <baldrick.bulk@free.fr>,
	linux-usb@vger.kernel.org,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH][USBATM]: convert heavy init dances to kthread API
Date: Thu, 07 Feb 2008 19:37:24 +0300	[thread overview]
Message-ID: <47AB33C4.7060501@openvz.org> (raw)
In-Reply-To: <Pine.LNX.4.44L0.0802071116360.4128-100000@iolanthe.rowland.org>

Alan Stern wrote:
> On Thu, 7 Feb 2008, Pavel Emelyanov wrote:
> 
>>> Does the kthread API guarantee that the kthread is not running until you call
>> It does. That's why the race, you mentioned above is impossible.
> 
> That is wrong.  The API guarantees only that the kthread is initially 
> created in a non-running state.  It cannot guarantee that no other 
> task will wake up the kthread before the caller does.

Other tasks cannot wake this thread up since they do not
know the struct task_struct pointer.

> Alan Stern
> 
> 


  reply	other threads:[~2008-02-07 16:38 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-02-06 16:15 Pavel Emelyanov
2008-02-06 17:20 ` Duncan Sands
2008-02-07  9:23   ` Pavel Emelyanov
2008-02-07  9:57     ` Duncan Sands
2008-02-07 10:08       ` Pavel Emelyanov
2008-02-10 20:30         ` Duncan Sands
2008-02-11 11:22           ` Pavel Emelyanov
2008-02-11 11:51             ` Duncan Sands
2008-02-07 16:18     ` Alan Stern
2008-02-07 16:37       ` Pavel Emelyanov [this message]
2008-02-11 12:26 [PATCH] Usbatm: " Pavel Emelyanov
2008-02-11 12:39 ` Duncan Sands

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