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Re: [RFC] [Patch] calgary iommu: Use the first kernel's tce tables in kdump

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From: Muli Ben-Yehuda
Subject: Re: [RFC] [Patch] calgary iommu: Use the first kernel's tce tables in kdump
Date: Thursday, March 13, 2008 - 8:49 am

On Wed, Mar 12, 2008 at 02:08:06PM -0400, Vivek Goyal wrote:


The problem as I understand it is that when we boot into the kdump
kernel we have left-over devices from the old kernel which are active
and initiating DMA's. This is fine as long as Calgayr is also active
(with the old kernel's mappings). Once we initialize Calgary (in the
kdump) kernel with the new mappings, however, it starts trapping all
those DMA's. We can't wait for them to stop, because that will only
happen when the device is re-initialized (or otherwise quiesced).

Cheers,
Muli
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Messages in current thread:
[RFC] [Patch] calgary iommu: Use the first kernel's tce ta ..., chandru, (Tue Oct 9, 1:40 pm)
Re: [RFC] [Patch] calgary iommu: Use the first kernel's tc ..., Muli Ben-Yehuda, (Tue Oct 9, 2:06 pm)
Re: [RFC] [Patch] calgary iommu: Use the first kernel's tc ..., Vivek Goyal, (Tue Oct 9, 10:30 pm)
Re: [RFC] [Patch] calgary iommu: Use the first kernel's tc ..., Vivek Goyal, (Tue Oct 9, 10:37 pm)
Re: [RFC] [Patch] calgary iommu: Use the first kernel's tc ..., Muli Ben-Yehuda, (Sat Oct 13, 10:41 pm)
Re: [RFC] [Patch] calgary iommu: Use the first kernel's tc ..., Vivek Goyal, (Sun Oct 14, 11:29 pm)
Re: [RFC] [Patch] calgary iommu: Use the first kernel's tc ..., Chandru, (Mon Mar 10, 6:20 am)
Re: [RFC] [Patch] calgary iommu: Use the first kernel's tc ..., Andrew Morton, (Mon Mar 10, 9:09 am)
Re: [RFC] [Patch] calgary iommu: Use the first kernel's tc ..., Vivek Goyal, (Tue Mar 11, 6:29 am)
Re: [RFC] [Patch] calgary iommu: Use the first kernel's tc ..., Chandru, (Tue Mar 11, 10:08 pm)
Re: [RFC] [Patch] calgary iommu: Use the first kernel's tc ..., Muli Ben-Yehuda, (Wed Mar 12, 2:58 am)
Re: [RFC] [Patch] calgary iommu: Use the first kernel's tc ..., Vivek Goyal, (Wed Mar 12, 11:08 am)
Re: [RFC] [Patch] calgary iommu: Use the first kernel's tc ..., Muli Ben-Yehuda, (Thu Mar 13, 8:49 am)
Re: [RFC] [Patch] calgary iommu: Use the first kernel's tc ..., Chandru, (Sat Jun 21, 5:11 am)
Re: [RFC] [Patch] calgary iommu: Use the first kernel's tc ..., Mark Salyzyn, (Sat Jun 21, 5:25 am)
Re: [RFC] [Patch] calgary iommu: Use the first kernel's tc ..., Muli Ben-Yehuda, (Mon Jun 23, 12:29 pm)
Re: [RFC] [Patch] calgary iommu: Use the first kernel's tc ..., Chandru, (Tue Jul 15, 1:45 am)
Re: [RFC] [Patch] calgary iommu: Use the first kernel's tc ..., Muli Ben-Yehuda, (Tue Jul 15, 3:52 am)
Re: [RFC] [Patch] calgary iommu: Use the first kernel's tc ..., Andrew Morton, (Thu Jul 17, 4:14 pm)
Re: [RFC] [Patch] calgary iommu: Use the first kernel's tc ..., Muli Ben-Yehuda, (Sun Jul 20, 2:42 am)