From: Eli Cohen <eli-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>
To: Roland Dreier <rdreier-FYB4Gu1CFyUAvxtiuMwx3w@public.gmane.org>
Cc: Jason Gunthorpe
<jgunthorpe-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>,
RDMA list <linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
Subject: Re: [PATCHv9 09/12] ib_core: Add VLAN support to IBoE
Date: Tue, 17 Aug 2010 17:36:23 +0300 [thread overview]
Message-ID: <20100817143623.GA626@mtldesk30> (raw)
In-Reply-To: <adaeidyw6bd.fsf-BjVyx320WGW9gfZ95n9DRSW4+XlvGpQz@public.gmane.org>
On Mon, Aug 16, 2010 at 03:17:42PM -0700, Roland Dreier wrote:
>
> I'm having a hard time figuring out what this sentence has to do with
> this patch. I don't see anywhere in the patch where the sl field is
> used except for copying the TOS into it, and I don't see what "user
> priority field" might be referring to.
(per the RoCE spec) the 3 LSbs of the SL in the address vector carry
the value that is meant to be used in the 802.1Q priority field
(user_priority).
>
> Also, how do VLANs work with multicast? As far as I can tell, there are
> no spare bits in an IB MGID or IPv6 multicast address that can be stolen
> to use for a VLAN ID. For example, how would I create an AH to use to
> send to MGID ff02::1 on VLAN 25?
>
We take the VLAN from the SGID.
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next prev parent reply other threads:[~2010-08-17 14:36 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-08-06 14:41 [PATCHv9 09/12] ib_core: Add VLAN support to IBoE Eli Cohen
2010-08-06 16:49 ` Jason Gunthorpe
[not found] ` <20100806164915.GL11306-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2010-08-16 12:51 ` Eli Cohen
2010-08-16 22:17 ` Roland Dreier
[not found] ` <adaeidyw6bd.fsf-BjVyx320WGW9gfZ95n9DRSW4+XlvGpQz@public.gmane.org>
2010-08-17 14:36 ` Eli Cohen [this message]
2010-08-17 16:43 ` Roland Dreier
[not found] ` <adatymtur55.fsf-BjVyx320WGW9gfZ95n9DRSW4+XlvGpQz@public.gmane.org>
2010-08-17 18:29 ` Eli Cohen
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