From: Konrad Rzeszutek Wilk <konrad@kernel.org>
To: Takao Indoh <indou.takao@jp.fujitsu.com>
Cc: vgoyal@redhat.com, kexec@lists.infradead.org,
linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org,
bhelgaas@google.com, hbabu@us.ibm.com,
ishii.hironobu@jp.fujitsu.com, martin.wilck@ts.fujitsu.com
Subject: Re: [RFC][PATCH] Reset PCIe devices to address DMA problem on kdump with iommu
Date: Fri, 14 Sep 2012 16:03:36 -0400 [thread overview]
Message-ID: <20120914200334.GA9041@phenom.dumpdata.com> (raw)
In-Reply-To: <504F1343.7030607@jp.fujitsu.com>
> As to the boot parameter to enable this function, you suggested using
> reset_devices. I found that on a certain platform resetting devices
> caused PCIe error due to a hardware bug. Therefore I think we need
> new parameter apart from reset_devices to disable this function on
> such a machine.
Wouldn't a DMI quirk be better for this? That way the second kernel
internally would know not to do this.
WARNING: multiple messages have this Message-ID (diff)
From: Konrad Rzeszutek Wilk <konrad@kernel.org>
To: Takao Indoh <indou.takao@jp.fujitsu.com>
Cc: martin.wilck@ts.fujitsu.com, linux-pci@vger.kernel.org,
kexec@lists.infradead.org, linux-kernel@vger.kernel.org,
hbabu@us.ibm.com, ishii.hironobu@jp.fujitsu.com,
bhelgaas@google.com, vgoyal@redhat.com
Subject: Re: [RFC][PATCH] Reset PCIe devices to address DMA problem on kdump with iommu
Date: Fri, 14 Sep 2012 16:03:36 -0400 [thread overview]
Message-ID: <20120914200334.GA9041@phenom.dumpdata.com> (raw)
In-Reply-To: <504F1343.7030607@jp.fujitsu.com>
> As to the boot parameter to enable this function, you suggested using
> reset_devices. I found that on a certain platform resetting devices
> caused PCIe error due to a hardware bug. Therefore I think we need
> new parameter apart from reset_devices to disable this function on
> such a machine.
Wouldn't a DMI quirk be better for this? That way the second kernel
internally would know not to do this.
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next prev parent reply other threads:[~2012-09-14 20:14 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-03 11:24 [RFC][PATCH] Reset PCIe devices to address DMA problem on kdump with iommu Takao Indoh
2012-08-03 11:24 ` Takao Indoh
2012-08-03 11:46 ` Vivek Goyal
2012-08-03 11:46 ` Vivek Goyal
2012-08-06 4:30 ` Takao Indoh
2012-08-06 4:30 ` Takao Indoh
2012-08-06 20:39 ` Vivek Goyal
2012-08-06 20:39 ` Vivek Goyal
2012-08-07 9:02 ` Takao Indoh
2012-08-07 9:02 ` Takao Indoh
2012-09-05 11:09 ` Takao Indoh
2012-09-05 11:09 ` Takao Indoh
2012-09-10 2:34 ` Kaneshige, Kenji
2012-09-10 2:34 ` Kaneshige, Kenji
2012-09-10 6:35 ` Takao Indoh
2012-09-10 6:35 ` Takao Indoh
2012-09-11 11:52 ` Kaneshige, Kenji
2012-09-11 11:52 ` Kaneshige, Kenji
2012-09-10 14:36 ` Vivek Goyal
2012-09-10 14:36 ` Vivek Goyal
2012-09-11 10:32 ` Takao Indoh
2012-09-11 10:32 ` Takao Indoh
2012-09-11 14:43 ` Vivek Goyal
2012-09-11 14:43 ` Vivek Goyal
2012-09-12 9:00 ` Takao Indoh
2012-09-12 9:00 ` Takao Indoh
2012-09-14 15:48 ` Vivek Goyal
2012-09-14 15:48 ` Vivek Goyal
2012-09-24 11:22 ` Takao Indoh
2012-09-24 11:22 ` Takao Indoh
2012-09-14 20:03 ` Konrad Rzeszutek Wilk [this message]
2012-09-14 20:03 ` Konrad Rzeszutek Wilk
2012-09-19 1:52 ` Takao Indoh
2012-09-19 1:52 ` Takao Indoh
2012-09-21 17:57 ` Don Dutile
2012-09-21 17:57 ` Don Dutile
2012-09-24 11:12 ` Takao Indoh
2012-09-24 11:12 ` Takao Indoh
2012-08-06 4:09 ` Don Dutile
2012-08-06 4:09 ` Don Dutile
2012-08-06 4:45 ` Takao Indoh
2012-08-06 4:45 ` Takao Indoh
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