linux-kernel - Re: [PATCH] PCI/MSI: Export all remapped MSIs to sysfs attributes

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Message-ID: <alpine.DEB.2.11.1510111148340.6097@nanos>
Date:	Sun, 11 Oct 2015 11:49:01 +0200 (CEST)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Bjorn Helgaas <helgaas@...nel.org>
cc:	Romain Bezut <rbezut@...il.com>, linux-pci@...r.kernel.org,
	bhelgaas@...gle.com, linux-kernel@...r.kernel.org,
	Neil Horman <nhorman@...driver.com>
Subject: Re: [PATCH] PCI/MSI: Export all remapped MSIs to sysfs attributes

On Fri, 9 Oct 2015, Bjorn Helgaas wrote:
> On Thu, Sep 24, 2015 at 01:31:16AM +0200, Romain Bezut wrote:
> > irqbalance uses these attributes to populate its internal database, which is
> > then used to bind the irq on the appropriate NUMA node.
> > 
> > On a device accepting multiple MSIs and with interrupt remapping enabled,
> > only the first irq entry is exported to msi_irqs directory.
> > This results in irqbalance having no clue of the NUMA affinity for the extra
> > irqs and starting to bind them on random nodes.
> > 
> > This patch exports all MSI interrupts as sysfs attributes when relevant.
> > 
> > Signed-off-by: Romain Bezut <rbezut@...il.com>
> 
> This seems like it makes sense to me.  Do you have any bug reports
> related to this problem?  If so, I'll mention them in the changelog.
> 
> Added Neil, Thomas, and linux-kernel since this is of interest to folks
> beyond the usual linux-pci audience.

Acked-by: Thomas Gleixner <tglx@...utronix.de>
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