From: Jiang Liu <jiang.liu@linux.intel.com>
To: Thomas Gleixner <tglx@linutronix.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Ingo Molnar <mingo@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>,
"Rafael J. Wysocki" <rjw@rjwysocki.net>,
Bjorn Helgaas <bhelgaas@google.com>,
Randy Dunlap <rdunlap@infradead.org>,
Yinghai Lu <yinghai@kernel.org>, Borislav Petkov <bp@alien8.de>,
Grant Likely <grant.likely@linaro.org>,
Marc Zyngier <marc.zyngier@arm.com>,
Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>,
Andrew Morton <akpm@linux-foundation.org>,
Tony Luck <tony.luck@intel.com>, Joerg Roedel <joro@8bytes.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
x86@kernel.org, linux-kernel@vger.kernel.org,
linux-pci@vger.kernel.org, linux-acpi@vger.kernel.org,
linux-arm-kernel@lists.infradead.org
Subject: Re: [RFC Part2 v1 02/21] genirq: Introduce helper functions to support stacked irq_chip
Date: Wed, 17 Sep 2014 11:07:13 +0800 [thread overview]
Message-ID: <5418FAE1.4030008@linux.intel.com> (raw)
In-Reply-To: <alpine.DEB.2.10.1409161044330.4247@nanos>
On 2014/9/17 1:45, Thomas Gleixner wrote:
> On Thu, 11 Sep 2014, Jiang Liu wrote:
>> +#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
>> +void irq_chip_ack_parent(struct irq_data *data)
>> +{
>> + data = data->parent_data;
>> + if (data && data->chip && data->chip->irq_ack)
>> + data->chip->irq_ack(data);
>
> Why is this restricted to a single parent level and does not go down
> the whole stack?
Hi Thomas,
It happens to work on x86, and we want to achieve a bit
performance advantage by not walking down the whole stack.
If preferred, I will change it to walk the whole stack.
Regards!
Gerry
>
> Thanks,
>
> tglx
>
WARNING: multiple messages have this Message-ID (diff)
From: jiang.liu@linux.intel.com (Jiang Liu)
To: linux-arm-kernel@lists.infradead.org
Subject: [RFC Part2 v1 02/21] genirq: Introduce helper functions to support stacked irq_chip
Date: Wed, 17 Sep 2014 11:07:13 +0800 [thread overview]
Message-ID: <5418FAE1.4030008@linux.intel.com> (raw)
In-Reply-To: <alpine.DEB.2.10.1409161044330.4247@nanos>
On 2014/9/17 1:45, Thomas Gleixner wrote:
> On Thu, 11 Sep 2014, Jiang Liu wrote:
>> +#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
>> +void irq_chip_ack_parent(struct irq_data *data)
>> +{
>> + data = data->parent_data;
>> + if (data && data->chip && data->chip->irq_ack)
>> + data->chip->irq_ack(data);
>
> Why is this restricted to a single parent level and does not go down
> the whole stack?
Hi Thomas,
It happens to work on x86, and we want to achieve a bit
performance advantage by not walking down the whole stack.
If preferred, I will change it to walk the whole stack.
Regards!
Gerry
>
> Thanks,
>
> tglx
>
next prev parent reply other threads:[~2014-09-17 3:08 UTC|newest]
Thread overview: 108+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-11 14:03 [RFC Part2 v1 00/21] Enable hierarchy irqdomian on x86 platforms Jiang Liu
2014-09-11 14:03 ` Jiang Liu
2014-09-11 14:03 ` [RFC Part2 v1 01/21] irqdomain: Introduce new interfaces to support hierarchy irqdomains Jiang Liu
2014-09-11 14:03 ` Jiang Liu
2014-09-16 17:43 ` Thomas Gleixner
2014-09-16 17:43 ` Thomas Gleixner
2014-09-18 7:28 ` Jiang Liu
2014-09-18 7:28 ` Jiang Liu
2014-09-22 8:17 ` [Patch] " Jiang Liu
2014-09-22 8:17 ` Jiang Liu
2014-09-22 17:30 ` Randy Dunlap
2014-09-22 17:30 ` Randy Dunlap
2014-09-24 5:26 ` Jiang Liu
2014-09-24 5:26 ` Jiang Liu
2014-09-24 5:26 ` Jiang Liu
2014-09-23 9:43 ` Joe.C
2014-09-23 9:43 ` Joe.C
2014-09-24 5:55 ` Jiang Liu
2014-09-24 5:55 ` Jiang Liu
2014-09-18 8:48 ` [RFC Part2 v1 01/21] " Joe.C
2014-09-18 8:48 ` Joe.C
2014-09-18 8:58 ` Jiang Liu
2014-09-18 8:58 ` Jiang Liu
2014-09-24 6:55 ` Yasuaki Ishimatsu
2014-09-24 6:55 ` Yasuaki Ishimatsu
2014-09-24 6:55 ` Yasuaki Ishimatsu
2014-09-24 7:23 ` Jiang Liu
2014-09-24 7:23 ` Jiang Liu
2014-09-11 14:03 ` [RFC Part2 v1 02/21] genirq: Introduce helper functions to support stacked irq_chip Jiang Liu
2014-09-11 14:03 ` Jiang Liu
2014-09-11 14:03 ` Jiang Liu
2014-09-16 17:45 ` Thomas Gleixner
2014-09-16 17:45 ` Thomas Gleixner
2014-09-17 3:07 ` Jiang Liu [this message]
2014-09-17 3:07 ` Jiang Liu
2014-09-17 20:58 ` Thomas Gleixner
2014-09-17 20:58 ` Thomas Gleixner
2014-09-18 6:14 ` Jiang Liu
2014-09-18 6:14 ` Jiang Liu
2014-09-11 14:03 ` [RFC Part2 v1 03/21] x86, irq: Save destination CPU ID in irq_cfg Jiang Liu
2014-09-11 14:03 ` Jiang Liu
2014-09-16 17:47 ` Thomas Gleixner
2014-09-16 17:47 ` Thomas Gleixner
2014-09-17 2:24 ` Jiang Liu
2014-09-17 2:24 ` Jiang Liu
2014-09-11 14:03 ` [RFC Part2 v1 04/21] x86, irq: Use hierarchy irqdomain to manage CPU interrupt vectors Jiang Liu
2014-09-11 14:03 ` Jiang Liu
2014-09-11 14:03 ` [RFC Part2 v1 05/21] x86, hpet: Use new irqdomain interfaces to allocate/free IRQ Jiang Liu
2014-09-11 14:03 ` Jiang Liu
2014-09-11 14:03 ` [RFC Part2 v1 06/21] x86, MSI: " Jiang Liu
2014-09-11 14:03 ` Jiang Liu
2014-09-11 14:03 ` Jiang Liu
2014-09-11 14:03 ` [RFC Part2 v1 07/21] x86, uv: " Jiang Liu
2014-09-11 14:03 ` Jiang Liu
2014-09-11 14:03 ` [RFC Part2 v1 08/21] x86, htirq: " Jiang Liu
2014-09-11 14:03 ` Jiang Liu
2014-09-11 14:03 ` Jiang Liu
2014-09-11 14:03 ` [RFC Part2 v1 09/21] x86, dmar: " Jiang Liu
2014-09-11 14:03 ` Jiang Liu
2014-09-11 14:03 ` Jiang Liu
2014-09-11 14:03 ` [RFC Part2 v1 10/21] x86: irq_remapping: Introduce new interfaces to support hierarchy irqdomain Jiang Liu
2014-09-11 14:03 ` Jiang Liu
2014-09-11 14:03 ` [RFC Part2 v1 11/21] iommu/vt-d: Change prototypes to prepare for enabling " Jiang Liu
2014-09-11 14:03 ` Jiang Liu
2014-09-11 14:03 ` Jiang Liu
2014-09-11 14:03 ` [RFC Part2 v1 12/21] iommu/vt-d: Enhance Intel IR driver to suppport " Jiang Liu
2014-09-11 14:03 ` Jiang Liu
2014-09-11 14:03 ` [RFC Part2 v1 13/21] iommu/amd: Enhance AMD " Jiang Liu
2014-09-11 14:03 ` Jiang Liu
2014-09-11 14:03 ` [RFC Part2 v1 14/21] x86, hpet: Enhance HPET IRQ to support " Jiang Liu
2014-09-11 14:03 ` Jiang Liu
2014-09-11 14:03 ` Jiang Liu
2014-09-16 18:31 ` Thomas Gleixner
2014-09-16 18:31 ` Thomas Gleixner
2014-09-17 5:16 ` Jiang Liu
2014-09-17 5:16 ` Jiang Liu
2014-09-11 14:03 ` [RFC Part2 v1 15/21] x86, MSI: Use hierarchy irqdomain to manage MSI interrupts Jiang Liu
2014-09-11 14:03 ` Jiang Liu
2014-09-11 14:03 ` Jiang Liu
2014-09-11 14:17 ` Ni, Xun
2014-09-11 14:17 ` Ni, Xun
2014-09-11 14:29 ` Jiang Liu
2014-09-11 14:29 ` Jiang Liu
2014-09-11 14:03 ` [RFC Part2 v1 16/21] x86, irq: Directly call native_compose_msi_msg() for DMAR IRQ Jiang Liu
2014-09-11 14:03 ` Jiang Liu
2014-09-11 14:03 ` [RFC Part2 v1 17/21] x86, htirq: Use hierarchy irqdomain to manage Hypertransport interrupts Jiang Liu
2014-09-11 14:03 ` Jiang Liu
2014-09-11 14:03 ` [RFC Part2 v1 18/21] iommu/vt-d: Clean up unused MSI related code Jiang Liu
2014-09-11 14:03 ` Jiang Liu
2014-09-11 14:03 ` [RFC Part2 v1 19/21] iommu/amd: " Jiang Liu
2014-09-11 14:03 ` Jiang Liu
2014-09-11 14:03 ` [RFC Part2 v1 20/21] x86: irq_remapping: " Jiang Liu
2014-09-11 14:03 ` Jiang Liu
2014-09-11 14:03 ` [RFC Part2 v1 21/21] x86, irq: Clean up unused MSI related code and interfaces Jiang Liu
2014-09-11 14:03 ` Jiang Liu
2014-09-24 7:59 ` [RFC Part2 v1 00/21] Enable hierarchy irqdomian on x86 platforms Yasuaki Ishimatsu
2014-09-24 7:59 ` Yasuaki Ishimatsu
2014-09-24 7:59 ` Yasuaki Ishimatsu
2014-09-24 8:10 ` Jiang Liu
2014-09-24 8:10 ` Jiang Liu
2014-09-24 8:12 ` Yasuaki Ishimatsu
2014-09-24 8:12 ` Yasuaki Ishimatsu
2014-09-24 8:12 ` Yasuaki Ishimatsu
2014-09-24 19:25 ` Thomas Gleixner
2014-09-24 19:25 ` Thomas Gleixner
2014-09-25 8:15 ` Yasuaki Ishimatsu
2014-09-25 8:15 ` Yasuaki Ishimatsu
2014-09-25 8:15 ` Yasuaki Ishimatsu
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