netdev - Re: [v3.3-rc1 regression] TCP: too many of orphaned sockets

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Date:	Fri, 27 Jan 2012 13:56:45 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Glauber Costa <glommer@...allels.com>
Cc:	netdev@...r.kernel.org, "David S. Miller" <davem@...emloft.net>,
	linux-kernel@...r.kernel.org
Subject: Re: [v3.3-rc1 regression] TCP: too many of orphaned sockets


* Glauber Costa <glommer@...allels.com> wrote:

> On 01/27/2012 04:46 PM, Ingo Molnar wrote:
> >
> >There's a new TCP regression in latest -git that triggers in
> >randconfig testing.
> >
> >With the attached config i'm getting tons of these messages:
> >
> >[   32.751209] TCP: too many of orphaned sockets
> >[   37.198307] TCP: too many of orphaned sockets
> >[   42.464404] TCP: too many of orphaned sockets
> >[   48.920392] TCP: too many of orphaned sockets
> >[   56.370026] TCP: too many of orphaned sockets
> >[   64.605937] TCP: too many of orphaned sockets
> >
> >and it's not possible to ssh into the testbox, the TCP
> >connection hangs.
> >
> >Before i put more effort into debugging this, is this bug
> >already known/fixed?
> >
> >NOTE: the .config is randconfig generated so it might have a few
> >weird combinations of config options. One such thing i noticed
> >is !CONFIG_BUG, this produces at least one of the following
> >build warnings in the networking code:
> >
> >net/core/ethtool.c:211:1: warning: control reaches end of non-void function [-Wreturn-type]
> >net/core/dev.c:1892:33: warning: unused variable ‘null_features’ [-Wunused-variable]
> >net/packet/af_packet.c:1878:30: warning: ‘hdrlen’ may be used uninitialized in this function [-Wmaybe-uninitialized]
> >net/xfrm/xfrm_policy.c:2456:17: warning: ‘xfrm_dst_ops’ may be used uninitialized in this function [-Wmaybe-uninitialized]
> >net/xfrm/xfrm_policy.c:1351:7: warning: ‘dst_ops’ may be used uninitialized in this function [-Wmaybe-uninitialized]
> >net/xfrm/xfrm_policy.c:1333:18: note: ‘dst_ops’ was declared here
> >net/xfrm/xfrm_policy.c:1351:7: warning: ‘dst_ops’ may be used uninitialized in this function [-Wmaybe-uninitialized]
> >net/xfrm/xfrm_policy.c:1333:18: note: ‘dst_ops’ was declared here
> >
> >Note#2, the message should probably be fixed as well:
> >
> >  -   TCP: too many of orphaned sockets
> >  +   TCP: too many orphaned sockets
> >
> >Thanks,
> >
> >	Ingo
> 
> Ingo,
> mind sharing your config?

attached.

Thanks,

	Ingo

View attachment "config" of type "text/plain" (77247 bytes)