linux-kernel - Re: [PATCH 2/5] virtio: introduce an API to set affinity for a virtqueue

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <878vcojbbf.fsf@rustcorp.com.au>
Date:	Thu, 06 Sep 2012 09:02:04 +0930
From:	Rusty Russell <rusty@...tcorp.com.au>
To:	Paolo Bonzini <pbonzini@...hat.com>, linux-kernel@...r.kernel.org
Cc:	linux-scsi@...r.kernel.org, kvm@...r.kernel.org,
	jasowang@...hat.com, mst@...hat.com,
	virtualization@...ts.linux-foundation.org
Subject: Re: [PATCH 2/5] virtio: introduce an API to set affinity for a virtqueue

Paolo Bonzini <pbonzini@...hat.com> writes:

> From: Jason Wang <jasowang@...hat.com>
>
> Sometimes, virtio device need to configure irq affinity hint to maximize the
> performance. Instead of just exposing the irq of a virtqueue, this patch
> introduce an API to set the affinity for a virtqueue.
>
> The api is best-effort, the affinity hint may not be set as expected due to
> platform support, irq sharing or irq type. Currently, only pci method were
> implemented and we set the affinity according to:
>
> - if device uses INTX, we just ignore the request
> - if device has per vq vector, we force the affinity hint
> - if the virtqueues share MSI, make the affinity OR over all affinities
>   requested
>
> Signed-off-by: Jason Wang <jasowang@...hat.com>
> Signed-off-by: Paolo Bonzini <pbonzini@...hat.com>

Applied, thanks.

Acked-by: Rusty Russell <rusty@...tcorp.com.au>

Cheers,
Rusty.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/