linux-kernel - Re: [PATCH resubmit 2/3] AIO: Fix reference counting in io_cancel and aio_cancel

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Date:	Tue, 16 Mar 2010 19:26:04 +0300
From:	Сергей Темерханов 
	<temerkhanov@...ronik.ru>
To:	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH resubmit 2/3] AIO: Fix reference counting in io_cancel and aio_cancel_all

On Tuesday 16 March 2010 17:46:10 Jeff Moyer wrote:
> Sergey Temerkhanov <temerkhanov@...ronik.ru> writes:
> > io_cancel() and aio_cancel_all() have inconsistent reference counting
> > (ki_users field of struct kiocb) which leads to unkillable processes upon
> > io_cancel() or io_destroy() syscalls. This patch fixes the undesired
> > behavior.
> 
> Hi, Sergey,
> 
> Thanks for the patch.  Would you mind resubmitting it to make it a bit
> easier to review?  The way you've done things, it is difficult to tell
> if you just moved the aio_cancel_all function or if you moved it and
> made changes.  Please have the patch that moves it separated out from
> other changes, or at least mention in the changelog that the function
> was unchanged.  Next, if you could tell what sorts of testing you've
> performed, that would be great.  Finally, it would be a good idea to CC
> linux-aio@...ck.org on aio patches.
> 
> Thanks!
> Jeff
> 

This patch fixes reference counting in io_cancel() and aio_cancel_all()

Regards, Sergey Temerkhanov, Cifronic ZAO

View attachment "aio-fix.patch" of type "text/x-patch" (536 bytes)