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Date:	Sun, 30 Nov 2014 16:21:06 +0800
From:	Herbert Xu <>
To:	Marcelo Ricardo Leitner <>
Cc:	netdev <>
Subject: Re: tun issue after e0b46d0ee9c: tun: Use iovec iterators

On Sat, Nov 29, 2014 at 03:08:09AM -0200, Marcelo Ricardo Leitner wrote:
> On 28-11-2014 21:59, Herbert Xu wrote:
> >On Fri, Nov 28, 2014 at 05:25:27PM -0200, Marcelo Ricardo Leitner wrote:
> >>
> >>I saw there are tun updates on Dave's queue but none seemed to handle this.
> >>
> >>I can't use current net-next
> >>(799d2fff1858004526ad75d66a5dd8a5cce6ad40) on a kvm hypervisor
> >>because tun got clogged somehow. Bisected down to:
> >>
> >>commit e0b46d0ee9c240c7430a47e9b0365674d4a04522
> >>Author: Herbert Xu <>
> >>Date:   Fri Nov 7 21:22:23 2014 +0800
> >
> >Does this patch help?
> Yay, it does! Works for me, thanks Herbert.
> I didn't test performance, but dhcp could get through.
> Are you sure about the Fixes tag? Because bisect really pointed to e0b46d0ee9c.

Well according to your report you were having problems with
tun_get_user.  The bug I introduced was in tun_put_user and has
already been fixed by Jason Wang.

Email: Herbert Xu <>
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