netdev - Re: [PATCH net-next 2/2] sunvnet: vnet_start

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: <542C56A5.4070805@oracle.com>
Date:	Wed, 01 Oct 2014 15:31:49 -0400
From:	David L Stevens <david.stevens@...cle.com>
To:	Sowmini Varadhan <sowmini.varadhan@...cle.com>
CC:	davem@...emloft.net, raghuram.kothakota@...cle.com,
	netdev@...r.kernel.org
Subject: Re: [PATCH net-next 2/2] sunvnet: vnet_start_xmit() must hold a refcnt
 on port.

On 10/01/2014 03:23 PM, Sowmini Varadhan wrote:
> On (10/01/14 15:06), David L Stevens wrote:
>>
>> This "vp->switch_port" addition doesn't appear to be related to the port refcnt
>> change, and doesn't allow for multiple switch ports.
> 
> The switch_port is the connection to Dom0. Do you envision us having more than
> one switch_port? How?

While Dom0 might only create one port with the "switch" flag, the flag just means
"I can reach anybody" and is not inherently unique. I don't think an attached
VM should assume there is always only one; it prevents multipath load balancing
kinds of things in the future.

Also, there is the broader point that this sort of change should be a separate patch.
It isn't required for fixing the dangling reference -- it is an independent change.

							+-DLS

--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html