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From: Heiner Kallweit <heiner.kallweit@web.de>
To: linux-pci@vger.kernel.org
Cc: "linux-arm-kernel"@lists.infradead.org, l.stach@pengutronix.de
Subject: Setting cpu affinity for MSI-X on i.mx6 possible?
Date: Sun, 26 Oct 2014 19:05:43 +0100	[thread overview]
Message-ID: <544D37F7.2060800@web.de> (raw)

I use a mini pc with i.mx6 dual and Intel igb based nic (I211) connected via PCIE.
igb driver uses MSI-X and creates two rx/tx queue pairs. However the IRQs of all queues are handled by the same CPU.
Changing affinity is not possible. Obvious direct reason is that irq_chip PCI-MSI doesn't implement the callback
for setting cpu affinity.
I'd appreciate a hint whether this is a general limitation of the Cortex-A9 / GICv1 / Synopsys Designware
architecture or whether just a proper implementation is missing yet.

Rgds, Heiner

             reply	other threads:[~2014-10-26 18:05 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-10-26 18:05 Heiner Kallweit [this message]
2014-10-27  8:52 ` Setting cpu affinity for MSI-X on i.mx6 possible? Lucas Stach
2014-10-27  8:52   ` Lucas Stach
2014-10-27 19:16   ` Heiner Kallweit
2014-10-27 19:16     ` Heiner Kallweit
2014-10-27 19:31     ` Bjorn Helgaas
2014-10-27 19:31       ` Bjorn Helgaas
2014-10-27 19:38       ` Heiner Kallweit
2014-10-27 19:38         ` Heiner Kallweit
2014-10-28 12:10     ` Lucas Stach
2014-10-28 12:10       ` Lucas Stach
2014-10-28 18:20       ` Heiner Kallweit
2014-10-28 18:20         ` Heiner Kallweit

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