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Date
1 - 2 of 2
minutes: IO Visor TSC and Dev Members Call
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Brenden Blanco <bblanco@...>
Hi All,
Below, please find the meeting minutes from yesterday. IO Visor had two sessions at OpenStack Summit in Austin last week. The first was from Yunsong@Huawei [1], which covered how they are using IO Visor/BPF in different form factors. The second was from Deepa and myself, covering how we wrote IO Modules to enforce application/container policy within CloudFoundry. [1] https://github.com/iovisor/bpf-docs/blob/master/openstack/2016-04-25/OpenStackSummitAustin2016_iovisor_v1.0.pdf On the kernel side, multiple updates: Alexei finishing up direct packet access to improve performance won't need pseudo skb simple descriptor: *data, length restrictions: tc: read-only access xdp: read-write Danie constant blinding being worked on push-pop: "change" helper has been in flight for some time, tricky only really suitable for xdp Jesper mm summit update (see other mail thread) optimizing page allocator making progress recycling facility to be used cross devices page pool allocator would need to be implemented by the driver to add support dma map/unmap fits in as a constructor/destructor of the page when returned from the pool to the allocator John lockless qdisc coming soon possible lockless htb One Idea Alexei and Brenden were throwing around was to incorporate CTF - common c-type format, to be used instead of header files for discovering kernel struct layouts. This could also be used to describe bpf maps, automatic table pretty-print from kernel. We also discussed XDP ideas a bit. For now, as Alexei updated in the page-pool thread, we should try to create a simple forward action that takes no parameters, and the device has a simple rxq -> txq mapping. With this action, the packet leaves the same port it came in on. Use cases could be load-balancer type of device in one-arm mode. More complicated forwarding behavior could build on top of this without breaking any ABI. Attendees: Jesper Brouer Brenden Blanco Daniel Borkmann Alexei Starovoitov Prem Jonnalagadda John Fastabend |
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Alexei Starovoitov
the tracing micro-conference accepted into Linux Plumbers 2016 !
http://wiki.linuxplumbersconf.org/2016:tracing http://paulmck.livejournal.com/43262.html https://www.linuxplumbersconf.org/2016/ Hope to see you all in New Mexico. November is a bit far away, but if you're thinking that you might attend, please edit the wiki with your talk proposals. 1-5 slides max. The discussion preferred instead of presentation. If you're not on attendee list, please add yourself there too, so we can arrange appropriate room size. Thanks! On Thu, May 5, 2016 at 10:02 AM, Brenden Blanco via iovisor-dev <iovisor-dev@...> wrote: Hi All, |