From: Andi Kleen <ak@suse.de>
To: Jeff Garzik <jgarzik@pobox.com>
Cc: Jens Axboe <axboe@suse.de>, Michael Monnerie <m.monnerie@zmi.at>,
linux-kernel@vger.kernel.org
Subject: Re: PCI-DMA: Out of IOMMU space on x86-64 (Athlon64x2), with solution
Date: Thu, 2 Mar 2006 13:26:32 +0100 [thread overview]
Message-ID: <200603021326.33220.ak@suse.de> (raw)
In-Reply-To: <4406E226.4050806@pobox.com>
On Thursday 02 March 2006 13:16, Jeff Garzik wrote:
> > Yes I've been thinking about adding a new sleeping interface to the IOMMU
> > that would block for new space to handle this. If I did that - would
> > libata be able to use it?
>
> No :( We map inside a spin_lock_irqsave.
Would it be easily possible to change that or is it difficult?
Also with the blocking interface there might be possible deadlock issues
because it will be essentially similar to allocating memory during IO.
But I think it's probably safe.
-Andi
next prev parent reply other threads:[~2006-03-02 12:24 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-03-01 23:23 PCI-DMA: Out of IOMMU space on x86-64 (Athlon64x2), with solution Michael Monnerie
2006-03-02 1:03 ` Andi Kleen
2006-03-02 9:59 ` Jens Axboe
2006-03-03 8:16 ` Chris Wedgwood
2006-03-03 11:00 ` Andi Kleen
[not found] ` <200603021316.38077.ak@suse.de>
[not found] ` <4406E226.4050806@pobox.com>
2006-03-02 12:26 ` Andi Kleen [this message]
2006-03-02 12:31 ` Jens Axboe
2006-03-02 12:33 ` Jeff Garzik
[not found] ` <20060302123033.GL4329@suse.de>
2006-03-02 13:09 ` Andi Kleen
2006-03-02 13:10 ` Jens Axboe
2006-03-02 13:33 ` Andi Kleen
2006-03-02 13:33 ` Jens Axboe
2006-03-02 13:46 ` Andi Kleen
2006-03-02 13:49 ` Jens Axboe
2006-03-02 13:58 ` Andi Kleen
2006-03-02 14:14 ` Jens Axboe
2006-03-02 14:35 ` Andi Kleen
2006-03-02 14:38 ` Jens Axboe
-- strict thread matches above, loose matches on Subject: below --
2006-03-03 21:27 Allen Martin
2006-03-03 22:12 ` Andi Kleen
2006-03-03 22:23 ` Jeff Garzik
2006-03-03 22:32 ` Andi Kleen
2006-03-04 6:34 ` Michael Monnerie
[not found] <5Mq18-1Na-21@gated-at.bofh.it>
[not found] ` <5MqNc-2Y5-3@gated-at.bofh.it>
[not found] ` <5MqX4-39H-21@gated-at.bofh.it>
[not found] ` <5MyAS-5zh-5@gated-at.bofh.it>
2006-03-07 0:15 ` Robert Hancock
2006-04-02 7:51 ` Joerg Bashir
2006-04-02 8:00 ` Muli Ben-Yehuda
2006-04-02 8:24 ` Joerg Bashir
2006-04-02 11:16 ` Andi Kleen
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