linux-kernel - Re: [PATCH -mm 3/4][AIO] - AIO completion signal notification

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Message-ID: <456424D7.7060204@oracle.com>
Date:	Wed, 22 Nov 2006 02:22:15 -0800
From:	Zach Brown <zach.brown@...cle.com>
To:	Sébastien Dugué <sebastien.dugue@...l.net>
CC:	linux-kernel <linux-kernel@...r.kernel.org>,
	linux-aio <linux-aio@...ck.org>, Andrew Morton <akpm@...l.org>,
	Suparna Bhattacharya <suparna@...ibm.com>,
	Christoph Hellwig <hch@...radead.org>,
	Badari Pulavarty <pbadari@...ibm.com>,
	Jean Pierre Dion <jean-pierre.dion@...l.net>,
	Ulrich Drepper <drepper@...hat.com>
Subject: Re: [PATCH -mm 3/4][AIO] - AIO completion signal notification


>   OK, looking at this, there's something bothering me: io_submit_one() needs
> a pointer to the user iocb in order to push back the iocb->ki_key to userspace,
> as well as storing the user_iocb pointer into iocb->ki_obj.

Why can't it continue to do what it does today?  Both of those uses of
the user_iocb pointer involve fixed-width fields and don't need compat help.

>   So I think that some of the logic in io_submit_one() must be moved up to
> sys_io_submit(), including the aio_get_req() call.

I don't see why that would be needed.

- z
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