From: Andi Kleen <andi@firstfloor.org>
To: Takao Indoh <indou.takao@jp.fujitsu.com>
Cc: martin.wilck@ts.fujitsu.com, linux-pci@vger.kernel.org,
x86@kernel.org, kexec@lists.infradead.org,
linux-kernel@vger.kernel.org, hbabu@us.ibm.com, mingo@redhat.com,
ishii.hironobu@jp.fujitsu.com, hpa@zytor.com,
bhelgaas@google.com, tglx@linutronix.de, vgoyal@redhat.com
Subject: Re: [PATCH v2 0/2] Reset PCIe devices to address DMA problem on kdump with iommu
Date: Tue, 02 Oct 2012 12:37:44 -0700 [thread overview]
Message-ID: <m2mx04wtpz.fsf@firstfloor.org> (raw)
In-Reply-To: <20121002074434.204.47750.sendpatchset@indoh> (Takao Indoh's message of "Tue, 2 Oct 2012 16:49:56 +0900 (JST)")
Takao Indoh <indou.takao@jp.fujitsu.com> writes:
> These patches reset PCIe devices at boot time to address DMA problem on
> kdump with iommu. When "reset_devices" is specified, a hot reset is
> triggered on each PCIe root port and downstream port to reset its
> downstream endpoint.
Great. I've been pondering this for a long time, but you did finally
implement it. I hope this will make kdump a lot more reliable at least
on the systems that support per port reset.
Now the only question is: why make it a option and not default?
-Andi
--
ak@linux.intel.com -- Speaking for myself only
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WARNING: multiple messages have this Message-ID (diff)
From: Andi Kleen <andi@firstfloor.org>
To: Takao Indoh <indou.takao@jp.fujitsu.com>
Cc: linux-pci@vger.kernel.org, x86@kernel.org,
linux-kernel@vger.kernel.org, martin.wilck@ts.fujitsu.com,
kexec@lists.infradead.org, hbabu@us.ibm.com, mingo@redhat.com,
vgoyal@redhat.com, ishii.hironobu@jp.fujitsu.com, hpa@zytor.com,
bhelgaas@google.com, tglx@linutronix.de
Subject: Re: [PATCH v2 0/2] Reset PCIe devices to address DMA problem on kdump with iommu
Date: Tue, 02 Oct 2012 12:37:44 -0700 [thread overview]
Message-ID: <m2mx04wtpz.fsf@firstfloor.org> (raw)
In-Reply-To: <20121002074434.204.47750.sendpatchset@indoh> (Takao Indoh's message of "Tue, 2 Oct 2012 16:49:56 +0900 (JST)")
Takao Indoh <indou.takao@jp.fujitsu.com> writes:
> These patches reset PCIe devices at boot time to address DMA problem on
> kdump with iommu. When "reset_devices" is specified, a hot reset is
> triggered on each PCIe root port and downstream port to reset its
> downstream endpoint.
Great. I've been pondering this for a long time, but you did finally
implement it. I hope this will make kdump a lot more reliable at least
on the systems that support per port reset.
Now the only question is: why make it a option and not default?
-Andi
--
ak@linux.intel.com -- Speaking for myself only
next prev parent reply other threads:[~2012-10-02 19:37 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-02 7:49 [PATCH v2 0/2] Reset PCIe devices to address DMA problem on kdump with iommu Takao Indoh
2012-10-02 7:49 ` Takao Indoh
2012-10-02 7:50 ` [PATCH v2 1/2] x86, pci: Reset PCIe devices at boot time Takao Indoh
2012-10-02 7:50 ` Takao Indoh
2012-10-02 7:50 ` [PATCH v2 2/2] x86, pci: Enable PCI INTx when MSI is disabled Takao Indoh
2012-10-02 7:50 ` Takao Indoh
2012-10-02 19:37 ` Andi Kleen [this message]
2012-10-02 19:37 ` [PATCH v2 0/2] Reset PCIe devices to address DMA problem on kdump with iommu Andi Kleen
2012-10-02 19:44 ` Vivek Goyal
2012-10-02 19:44 ` Vivek Goyal
2012-10-03 0:57 ` Takao Indoh
2012-10-03 0:57 ` Takao Indoh
2012-10-03 13:23 ` Don Dutile
2012-10-03 13:23 ` Don Dutile
2012-10-09 9:03 ` Takao Indoh
2012-10-09 9:03 ` Takao Indoh
2012-10-09 16:05 ` Don Dutile
2012-10-09 16:05 ` Don Dutile
2012-10-10 4:22 ` Takao Indoh
2012-10-10 4:22 ` Takao Indoh
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