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From: Muli Ben-Yehuda <muli@il.ibm.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Chandru <chandru@in.ibm.com>,
	linux-kernel@vger.kernel.org, alexisb@us.ibm.com,
	Andy Whitcroft <apw@shadowen.org>
Subject: Re: [RFC] [Patch] calgary iommu: Use the first kernel's tce tables in kdump
Date: Sun, 20 Jul 2008 12:42:39 +0300	[thread overview]
Message-ID: <20080720094239.GE7173@il.ibm.com> (raw)
In-Reply-To: <20080717161414.c5a267f7.akpm@linux-foundation.org>

On Thu, Jul 17, 2008 at 04:14:14PM -0700, Andrew Morton wrote:
> On Tue, 15 Jul 2008 14:15:27 +0530
> Chandru <chandru@in.ibm.com> wrote:
> 
> > kdump kernel fails to boot with calgary iommu and aacraid driver on a x366 
> > box. The ongoing dma's of aacraid from the first kernel continue to exist 
> > until the driver is loaded in the kdump kernel. Calgary is initialized prior 
> > to aacraid and creation of new tce tables causes wrong dma's to occur. Here 
> > we try to get the tce tables of the first kernel in kdump kernel and use 
> > them. While in the kdump kernel we do not allocate new tce tables but instead 
> > read the base addres register contents of calgary iommu and use the tables 
> > that the registers point to. With these changes the kdump kernel and hence 
> > aacraid now boots normally.
> > 
> > Signed-off-by: Chandru Siddalingappa <chandru@in.ibm.com>
> > ---
> > 
> > patch taken on top of linux-2.6.26 stable. Comments from Muli Ben-Yehuda taken 
> > into consideration. Pls apply it as a stop-gap patch until we can come up 
> > with a more stable patch for this issue. Thanks,
> 
> Is this needed in 2.6.26?

No, it's 2.6.27 material.

Cheers,
Muli

  reply	other threads:[~2008-07-20  9:43 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-10-09 20:40 chandru
2007-10-09 21:06 ` Muli Ben-Yehuda
2007-10-10  5:30   ` Vivek Goyal
2007-10-14  5:41     ` Muli Ben-Yehuda
2007-10-15  6:29       ` Vivek Goyal
2007-12-24  5:15         ` Chandru
2008-03-10 13:20           ` Chandru
2008-03-10 16:09             ` Andrew Morton
2008-06-21 12:11               ` Chandru
2008-06-21 12:25                 ` Mark Salyzyn
2008-06-23 19:29                 ` Muli Ben-Yehuda
2008-07-15  8:45                   ` Chandru
2008-07-15 10:52                     ` Muli Ben-Yehuda
2008-07-17 23:14                     ` Andrew Morton
2008-07-20  9:42                       ` Muli Ben-Yehuda [this message]
2008-03-11 13:29             ` Vivek Goyal
2008-03-12  5:08               ` Chandru
2008-03-12  9:58                 ` Muli Ben-Yehuda
2008-03-12 18:08                   ` Vivek Goyal
2008-03-13 15:49                     ` Muli Ben-Yehuda
2007-10-10  5:37 ` Vivek Goyal

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