linux-kernel - Re: kvm aio wishlist

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Message-ID: <20081125155753.GA22504@elte.hu>
Date:	Tue, 25 Nov 2008 16:57:53 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Zach Brown <zach.brown@...cle.com>
Cc:	Jens Axboe <jens.axboe@...cle.com>, Avi Kivity <avi@...hat.com>,
	suparna@...ibm.com, linux-aio@...ck.org,
	Jeff Moyer <jmoyer@...hat.com>,
	Anthony Liguori <aliguori@...ibm.com>,
	linux-kernel@...r.kernel.org,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: kvm aio wishlist


* Zach Brown <zach.brown@...cle.com> wrote:

> > Still unsure why that stuff never got anywhere.
> 
> Changing the tid of submitting tasks makes it unsuitable for 
> sys_io_*() or posix aio users as it stands.  Maybe we could swap 
> tids on the switch, but we'd probably then have to audit the life 
> time of tid -> task_struct users in the kernel.

doesnt look like a big thing affecting the fastpath materially.

> And there's still the question of what ptrace is supposed to do.

debug-only, we sure can work something out.

	Ingo
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