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From: "David S. Miller" <davem@redhat.com>
To: davidm@hpl.hp.com, davidm@napali.hpl.hp.com
Cc: manfred@colorfullife.com, axboe@suse.de, linux-kernel@vger.kernel.org
Subject: Re: problem with blk_queue_bounce_limit()
Date: Thu, 05 Jun 2003 23:52:49 -0700 (PDT)	[thread overview]
Message-ID: <20030605.235249.35666087.davem@redhat.com> (raw)
In-Reply-To: <16096.14281.621282.67906@napali.hpl.hp.com>


Ok, ide-lib.c can call blk_queue_bounce_limit with only
3 different args:

1) BLK_BOUNCE_HIGH (--> blk_max_pfn)
2) BLK_BOUNCE_ANY (--> blk_max_lo_pfn)
3) pci_dev->dma_mask

David, you're not setting PCI_DMA_BUS_IS_PHYS properly.
For IOMMU it should be set to zero.  This tells the block
layer if you're IOMMU or not.

I knew it would be a bug like this.

Anyways, the problem case is #3 above and that will never
happen if you start setting PCI_DMA_BUS_IS_PHYS to zero
as appropriate.

  parent reply	other threads:[~2003-06-06  6:42 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-06-05  6:42 problem with blk_queue_bounce_limit() David Mosberger
2003-06-05  7:20 ` David S. Miller
2003-06-06  6:42   ` David Mosberger
2003-06-06  6:45     ` David S. Miller
2003-06-06  6:54       ` David Mosberger
2003-06-06  7:08         ` David S. Miller
2003-06-06  6:52     ` David S. Miller [this message]
2003-06-06  7:19       ` David Mosberger
2003-06-06  7:32         ` David S. Miller
2003-06-06  7:44           ` Christoph Hellwig
2003-06-06  7:43             ` David S. Miller
2003-06-06  7:51               ` Christoph Hellwig
2003-06-06 20:13           ` David Mosberger
2003-06-07  6:44             ` David S. Miller
2003-06-07  7:05               ` David Mosberger
2003-06-07  7:11                 ` David S. Miller
2003-06-10 20:01                   ` David Mosberger
2003-06-12  6:47                     ` David S. Miller
2003-06-15  7:06                   ` Anton Blanchard
2003-06-15  7:11                     ` David S. Miller
2003-06-15  8:04                       ` Anton Blanchard
2003-06-15  8:18                         ` David S. Miller
2003-06-07  7:20               ` David Mosberger
2003-06-07  7:19                 ` David S. Miller
2003-06-07  9:44                 ` Russell King
2003-06-07  9:47                   ` David S. Miller
2003-06-07 13:23                     ` Christoph Hellwig
2003-06-10 20:24                 ` David Mosberger
2003-06-06 18:06 James Bottomley

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