linux-kernel - Re: [RFC][PATCH 2/2] first callers of process_deny

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Date:	Thu, 09 Oct 2008 13:54:31 -0700
From:	Dave Hansen <dave@...ux.vnet.ibm.com>
To:	"Serge E. Hallyn" <serue@...ibm.com>
Cc:	containers@...ts.linux-foundation.org, Ingo Molnar <mingo@...e.hu>,
	arnd@...db.de, linux-kernel@...r.kernel.org
Subject: Re: [RFC][PATCH 2/2] first callers of process_deny_checkpoint()

On Thu, 2008-10-09 at 14:43 -0500, Serge E. Hallyn wrote:
> Hmm, I don't know too much about aio, but is it possible to succeed with
> io_getevents if we didn't first do a submit?  It looks like the contexts
> are looked up out of current->mm, so I don't think we need this call
> here.
> 
> Otherwise, this is neat.

Good question.  I know nothing, either. :)

My thought was that any process *trying* to do aio stuff of any kind is
going to be really confused if it gets checkpointed.  Or, it might try
to submit an aio right after it checks the list of them.  I thought it
best to be cautious and say, if you screw with aio, no checkpointing for
you!

-- Dave

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