netdev - Re: Possible regression with skb

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Date:	Fri, 10 Sep 2010 10:15:33 +0000
From:	Jarek Poplawski <jarkao2@...il.com>
To:	"Gustavo F. Padovan" <padovan@...fusion.mobi>
Cc:	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	marcel@...tmann.org, davem@...emloft.net,
	linux-bluetooth@...r.kernel.org
Subject: Re: Possible regression with skb_clone() in 2.6.36

On 2010-09-09 01:32, Gustavo F. Padovan wrote:
> I've been experiencing some problems when running the L2CAP Streaming mode in
> 2.6.36. The system quickly runs in an Out Of Memory condition and crash. That
> wasn't happening before, so I think we may have a regression here (I didn't
> find where yet). The crash log is below.
> 
> The following patch does not fix the regression, but shows that removing the
> skb_clone() call from l2cap_streaming_send() we workaround the problem. The
> patch is good anyway because it saves memory and time.
> 
> By now I have no idea on how to fix this.

My suggestion is to check the length of conn->data_q in hci_send_acl()
while this happens, and maybe try to set some limit here.

Jarek P.
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