[dpdk-dev] [PATCH] igb_uio: MSI IRQ mode, irq enable/disable refactored

Bruce Richardson bruce.richardson at intel.com
Wed Aug 23 10:47:35 CEST 2017


On Tue, Aug 22, 2017 at 09:55:53AM -0700, Stephen Hemminger wrote:
> On Mon, 21 Aug 2017 19:33:45 +0200
> Markus Theil <markus.theil at tu-ilmenau.de> wrote:
> 
> > This patch adds MSI IRQ mode and in a way, that should
> > also work on older kernel versions. The base for my patch
> > was an attempt to do this in cf705bc36c which was later reverted in
> > d8ee82745a. Compilation was tested on Linux 3.2, 4.10 and 4.12.
> > 
> > MSI(X) setup was already using pci_alloc_irq_vectors before,
> > but calls to pci_free_irq_vectors were missing and added.
> > 
> > Signed-off-by: Markus Theil <markus.theil at tu-ilmenau.de>
> 
> I wonder if DPDK should only N-1 Long Term Stable kernel.org kernels?
> That would mean 4.4.83 or later now, and 4.9 or later starting with 18.XX releases.
> 
> If enterprise distro's want to backport more, that is their prerogative but upstream
> DPDK shouldn't have to worry about it. The current mess with KNI especially is out
> of hand.

I agree in principal about limiting ourselves to only supporting a more
limited set of kernel versions in mainline. However, the exact number of
versions probably needs some discussion - my initial impression is that
what you propose is a little too limited.


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