From: Or Gerlitz <ogerlitz-smomgflXvOZWk0Htik3J/w@public.gmane.org>
To: "Hefty, Sean" <sean.hefty-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Cc: Ralph Campbell
<ralph.campbell-h88ZbnxC6KDQT0dZR+AlfA@public.gmane.org>,
"linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
Alex Vainman <alexv-smomgflXvOZWk0Htik3J/w@public.gmane.org>
Subject: Re: [PATCH 3/3] ibacm: check for special handling of loopback requests
Date: Wed, 17 Nov 2010 10:36:57 +0200 [thread overview]
Message-ID: <4CE39429.6030202@voltaire.com> (raw)
In-Reply-To: <CF9C39F99A89134C9CF9C4CCB68B8DDF25B8616939-osO9UTpF0USkrb+BlOpmy7fspsVTdybXVpNB7YpNyf8@public.gmane.org>
Hefty, Sean wrote:
> One could argue that this change is reasonable regardless of the OFED kernel patch. It avoids sending multicast traffic when the destination is local. The main drawback beyond the extra code is that a node can't send a multicast message to itself, with the intent that remote listeners will be able to cache the address data.
Sean,
To be precise, the bit avoids recieving multicast packets by the QP that
--sent-- it, not by other QPs subscribed to that group on the same
node/hca, the patch change-log even states that "Inter QP multicast
packets on the relevant HCA will still be delivered". You can test that
with two mckey processes running on a node which has the patch active.
So with acm the functionality you need is for the same QP to receive the
packets it sent?
Or.
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next prev parent reply other threads:[~2010-11-17 8:36 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-11-17 0:10 [PATCH 1/3] ibacm: enhance debug messages Hefty, Sean
[not found] ` <CF9C39F99A89134C9CF9C4CCB68B8DDF25B86168B9-osO9UTpF0USkrb+BlOpmy7fspsVTdybXVpNB7YpNyf8@public.gmane.org>
2010-11-17 0:12 ` [PATCH 2/3] ibacm: fix issuing SA query after recording address Hefty, Sean
2010-11-17 0:15 ` [PATCH 3/3] ibacm: check for special handling of loopback requests Hefty, Sean
[not found] ` <CF9C39F99A89134C9CF9C4CCB68B8DDF25B86168CE-osO9UTpF0USkrb+BlOpmy7fspsVTdybXVpNB7YpNyf8@public.gmane.org>
2010-11-17 0:31 ` Ralph Campbell
[not found] ` <1289953873.2365.179.camel-/vjeY7uYZjrPXfVEPVhPGq6RkeBMCJyt@public.gmane.org>
2010-11-17 0:54 ` Hefty, Sean
[not found] ` <CF9C39F99A89134C9CF9C4CCB68B8DDF25B8616939-osO9UTpF0USkrb+BlOpmy7fspsVTdybXVpNB7YpNyf8@public.gmane.org>
2010-11-17 1:08 ` Ralph Campbell
[not found] ` <1289956127.2365.190.camel-/vjeY7uYZjrPXfVEPVhPGq6RkeBMCJyt@public.gmane.org>
2010-11-17 1:24 ` Hefty, Sean
[not found] ` <CF9C39F99A89134C9CF9C4CCB68B8DDF25B8616977-osO9UTpF0USkrb+BlOpmy7fspsVTdybXVpNB7YpNyf8@public.gmane.org>
2010-11-17 1:37 ` Ralph Campbell
[not found] ` <1289957852.9693.7.camel-/vjeY7uYZjrPXfVEPVhPGq6RkeBMCJyt@public.gmane.org>
2010-11-17 8:33 ` Or Gerlitz
2010-11-17 17:11 ` Hefty, Sean
2010-11-17 8:36 ` Or Gerlitz [this message]
[not found] ` <4CE39429.6030202-smomgflXvOZWk0Htik3J/w@public.gmane.org>
2010-11-17 15:25 ` Hefty, Sean
2010-11-17 18:39 ` [PATCH 3/3 v2] ibacm: Introduce loopback resolution 'protocol' Hefty, Sean
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