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From: Bernhard Walle <bwalle@suse.de>
To: kexec@lists.infradead.org, linux-ia64@vger.kernel.org
Cc: Terry Loftin <terry.loftin@hp.com>, Khalid Aziz <khalid_aziz@hp.com>
Subject: [IA64] [kdump] machveg=dig on hpzx1 platforms
Date: Thu, 21 Jun 2007 20:24:41 +0200	[thread overview]
Message-ID: <20070621182441.GA21840@suse.de> (raw)

Hello,

on most HP machines, the 'machveg=dig' parameter is needed for the
kdump kernel to avoid problems with the HP ioc. In the original kdump
patches, a function ioc_iova_disable() was used, which (as I
understand) disabled the IOC before executing the new kernel. However,
that function wasn't added to mainline [2].

However, with a 2.6.22-rc kernel, booting into the kdump kernel works
surprisingly. I haven't found a fix in the git history that could be
responsible. Was there a fix? Or is it just a random result on a
machine I tested that it works?

Are there any plans to bring back ioc_iova_disable(), or would some
automatic kernel code that uses machvec=dig in the kernel without
forcing the user to pass an additional command line work?



Thanks,
   Bernhard

[1] http://article.gmane.org/gmane.linux.ports.ia64/15192
[2] http://article.gmane.org/gmane.linux.ports.ia64/15147


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WARNING: multiple messages have this Message-ID (diff)
From: Bernhard Walle <bwalle@suse.de>
To: kexec@lists.infradead.org, linux-ia64@vger.kernel.org
Cc: Terry Loftin <terry.loftin@hp.com>, Khalid Aziz <khalid_aziz@hp.com>
Subject: [IA64] [kdump] machveg=dig on hpzx1 platforms
Date: Thu, 21 Jun 2007 18:24:41 +0000	[thread overview]
Message-ID: <20070621182441.GA21840@suse.de> (raw)

Hello,

on most HP machines, the 'machveg=dig' parameter is needed for the
kdump kernel to avoid problems with the HP ioc. In the original kdump
patches, a function ioc_iova_disable() was used, which (as I
understand) disabled the IOC before executing the new kernel. However,
that function wasn't added to mainline [2].

However, with a 2.6.22-rc kernel, booting into the kdump kernel works
surprisingly. I haven't found a fix in the git history that could be
responsible. Was there a fix? Or is it just a random result on a
machine I tested that it works?

Are there any plans to bring back ioc_iova_disable(), or would some
automatic kernel code that uses machvec=dig in the kernel without
forcing the user to pass an additional command line work?



Thanks,
   Bernhard

[1] http://article.gmane.org/gmane.linux.ports.ia64/15192
[2] http://article.gmane.org/gmane.linux.ports.ia64/15147


             reply	other threads:[~2007-06-21 18:25 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-06-21 18:24 Bernhard Walle [this message]
2007-06-21 18:24 ` [IA64] [kdump] machveg=dig on hpzx1 platforms Bernhard Walle
2007-06-21 20:41 ` Terry Loftin
2007-06-21 20:41   ` Terry Loftin
2007-06-22  9:41   ` Bernhard Walle
2007-06-22  9:41     ` Bernhard Walle
2007-06-26  4:28   ` Milton Miller
2007-07-05 15:39   ` Prarit Bhargava
2007-07-05 15:39     ` Prarit Bhargava
2007-07-11 20:34   ` Luck, Tony
2007-07-11 20:34     ` Luck, Tony
2007-07-12 17:33     ` Terry Loftin
2007-07-12 17:33       ` Terry Loftin

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