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Re: [patch 23/30] net/mlx5: Use effective interrupt affinity
- To: Thomas Gleixner <tglx@xxxxxxxxxxxxx>, LKML <linux-kernel@xxxxxxxxxxxxxxx>
- From: Saeed Mahameed <saeed@xxxxxxxxxx>
- Date: Mon, 14 Dec 2020 12:58:36 -0800
- Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>, Marc Zyngier <maz@xxxxxxxxxx>, Leon Romanovsky <leon@xxxxxxxxxx>, "David S. Miller" <davem@xxxxxxxxxxxxx>, Jakub Kicinski <kuba@xxxxxxxxxx>, netdev@xxxxxxxxxxxxxxx, linux-rdma@xxxxxxxxxxxxxxx, "James E.J. Bottomley" <James.Bottomley@xxxxxxxxxxxxxxxxxxxxx>, Helge Deller <deller@xxxxxx>, afzal mohammed <afzal.mohd.ma@xxxxxxxxx>, linux-parisc@xxxxxxxxxxxxxxx, Russell King <linux@xxxxxxxxxxxxxxx>, linux-arm-kernel@xxxxxxxxxxxxxxxxxxx, Mark Rutland <mark.rutland@xxxxxxx>, Catalin Marinas <catalin.marinas@xxxxxxx>, Will Deacon <will@xxxxxxxxxx>, Christian Borntraeger <borntraeger@xxxxxxxxxx>, Heiko Carstens <hca@xxxxxxxxxxxxx>, linux-s390@xxxxxxxxxxxxxxx, Jani Nikula <jani.nikula@xxxxxxxxxxxxxxx>, Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx>, Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>, David Airlie <airlied@xxxxxxxx>, Daniel Vetter <daniel@xxxxxxxx>, Pankaj Bharadiya <pankaj.laxminarayan.bharadiya@xxxxxxxxx>, Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>, Wambui Karuga <wambui.karugax@xxxxxxxxx>, intel-gfx@xxxxxxxxxxxxxxxxxxxxx, dri-devel@xxxxxxxxxxxxxxxxxxxxx, Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxxxxxxxx>, Linus Walleij <linus.walleij@xxxxxxxxxx>, linux-gpio@xxxxxxxxxxxxxxx, Lee Jones <lee.jones@xxxxxxxxxx>, Jon Mason <jdmason@xxxxxxxx>, Dave Jiang <dave.jiang@xxxxxxxxx>, Allen Hubbe <allenbh@xxxxxxxxx>, linux-ntb@xxxxxxxxxxxxxxxx, Lorenzo Pieralisi <lorenzo.pieralisi@xxxxxxx>, Rob Herring <robh@xxxxxxxxxx>, Bjorn Helgaas <bhelgaas@xxxxxxxxxx>, Michal Simek <michal.simek@xxxxxxxxxx>, linux-pci@xxxxxxxxxxxxxxx, Karthikeyan Mitran <m.karthikeyan@xxxxxxxxxxxxxx>, Hou Zhiqiang <Zhiqiang.Hou@xxxxxxx>, Tariq Toukan <tariqt@xxxxxxxxxx>, Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>, Juergen Gross <jgross@xxxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Mon, 14 Dec 2020 21:43:24 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On Thu, 2020-12-10 at 20:25 +0100, 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@xxxxxxxxxxxxx>
> Cc: Saeed Mahameed <saeedm@xxxxxxxxxx>
> Cc: Leon Romanovsky <leon@xxxxxxxxxx>
> Cc: "David S. Miller" <davem@xxxxxxxxxxxxx>
> Cc: Jakub Kicinski <kuba@xxxxxxxxxx>
> Cc: netdev@xxxxxxxxxxxxxxx
> Cc: linux-rdma@xxxxxxxxxxxxxxx
>
Acked-by: Saeed Mahameed <saeedm@xxxxxxxxxx>
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