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Date: Sun, 13 Dec 2020 13:31:24 +0200 From: Tariq Toukan <ttoukan.linux@...il.com> To: Thomas Gleixner <tglx@...utronix.de>, LKML <linux-kernel@...r.kernel.org> Cc: Peter Zijlstra <peterz@...radead.org>, Marc Zyngier <maz@...nel.org>, Tariq Toukan <tariqt@...dia.com>, "David S. Miller" <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>, netdev@...r.kernel.org, linux-rdma@...r.kernel.org, "James E.J. Bottomley" <James.Bottomley@...senPartnership.com>, Helge Deller <deller@....de>, afzal mohammed <afzal.mohd.ma@...il.com>, linux-parisc@...r.kernel.org, Russell King <linux@...linux.org.uk>, linux-arm-kernel@...ts.infradead.org, Mark Rutland <mark.rutland@....com>, Catalin Marinas <catalin.marinas@....com>, Will Deacon <will@...nel.org>, Christian Borntraeger <borntraeger@...ibm.com>, Heiko Carstens <hca@...ux.ibm.com>, linux-s390@...r.kernel.org, Jani Nikula <jani.nikula@...ux.intel.com>, Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>, Rodrigo Vivi <rodrigo.vivi@...el.com>, David Airlie <airlied@...ux.ie>, Daniel Vetter <daniel@...ll.ch>, Pankaj Bharadiya <pankaj.laxminarayan.bharadiya@...el.com>, Chris Wilson <chris@...is-wilson.co.uk>, Wambui Karuga <wambui.karugax@...il.com>, intel-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org, Tvrtko Ursulin <tvrtko.ursulin@...ux.intel.com>, Linus Walleij <linus.walleij@...aro.org>, linux-gpio@...r.kernel.org, Lee Jones <lee.jones@...aro.org>, Jon Mason <jdmason@...zu.us>, Dave Jiang <dave.jiang@...el.com>, Allen Hubbe <allenbh@...il.com>, linux-ntb@...glegroups.com, Lorenzo Pieralisi <lorenzo.pieralisi@....com>, Rob Herring <robh@...nel.org>, Bjorn Helgaas <bhelgaas@...gle.com>, Michal Simek <michal.simek@...inx.com>, linux-pci@...r.kernel.org, Karthikeyan Mitran <m.karthikeyan@...iveil.co.in>, Hou Zhiqiang <Zhiqiang.Hou@....com>, Saeed Mahameed <saeedm@...dia.com>, Leon Romanovsky <leon@...nel.org>, Boris Ostrovsky <boris.ostrovsky@...cle.com>, Juergen Gross <jgross@...e.com>, Stefano Stabellini <sstabellini@...nel.org>, xen-devel@...ts.xenproject.org Subject: Re: [patch 21/30] net/mlx4: Use effective interrupt affinity On 12/10/2020 9:25 PM, Thomas Gleixner wrote: > Using the interrupt affinity mask for checking locality is not really > working well on architectures which support effective affinity masks. > > The affinity mask is either the system wide default or set by user space, > but the architecture can or even must reduce the mask to the effective set, > which means that checking the affinity mask itself does not really tell > about the actual target CPUs. > > Signed-off-by: Thomas Gleixner <tglx@...utronix.de> > Cc: Tariq Toukan <tariqt@...dia.com> > Cc: "David S. Miller" <davem@...emloft.net> > Cc: Jakub Kicinski <kuba@...nel.org> > Cc: netdev@...r.kernel.org > Cc: linux-rdma@...r.kernel.org > --- > drivers/net/ethernet/mellanox/mlx4/en_cq.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > --- a/drivers/net/ethernet/mellanox/mlx4/en_cq.c > +++ b/drivers/net/ethernet/mellanox/mlx4/en_cq.c > @@ -117,7 +117,7 @@ int mlx4_en_activate_cq(struct mlx4_en_p > assigned_eq = true; > } > irq = mlx4_eq_get_irq(mdev->dev, cq->vector); > - cq->aff_mask = irq_get_affinity_mask(irq); > + cq->aff_mask = irq_get_effective_affinity_mask(irq); > } else { > /* For TX we use the same irq per > ring we assigned for the RX */ > Reviewed-by: Tariq Toukan <tariqt@...dia.com> Thanks.
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