linux-kernel - Re: [PATCH] rds: rds_cong_queue_updates needs to defer the congestion update transmission

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Message-ID: <20150210165638.GR337@oracle.com>
Date:	Tue, 10 Feb 2015 11:56:38 -0500
From:	Sowmini Varadhan <sowmini.varadhan@...cle.com>
To:	Chuck Lever <chuck.lever@...cle.com>
Cc:	Chien Yen <chien.yen@...cle.com>, davem@...emloft.net,
	rds-devel@....oracle.com, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] rds: rds_cong_queue_updates needs to defer the
 congestion update transmission

On (02/10/15 11:50), Chuck Lever wrote:
> > 
> > This patch fixes a sock_lock deadlock in the rds_cong_queue_update path.
> 
> Note that the deadlock appears to exist only with TCP transports.
> 

True, but the patch does no harm to IB: this actually only reverts 
the change from commit 2fa57129d.

I could update the comment to note that this is only true for TCP
transports. Do you think that would help?

--Sowmini
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