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Re: [Xen-devel] [3.15-rc3] Bisected: xen-netback mangles packets between two guests on a bridge since merge of "TX grant mapping with SKBTX_DEV_ZEROCOPY instead of copy" series.
On Thu, 2014-05-01 at 17:40 +0200, Sander Eikelenboom wrote:
> Yesterday i tried to get packetdrill (https://code.google.com/p/packetdrill/)
> to
> work to see if i could reproduce with one of it's tests, but didn't get the
> client server stuff working. It seems it has helped with finding and fixing
> previous kernel networking bugs.
If you use recent net-next kernel, you need a packetdrill patch, Neal
might submit it shortly on packetdrill repo.
packetdrill currently does not consume the packets sent on the tun
device, so this triggers the new [1] TCP stack behavior detecting packet
did not yet leaved the host.
[1] :
(
http://git.kernel.org/cgit/linux/kernel/git/davem/net-next.git/commit/?id=1f3279ae0c13cd742731726b0ed195d5f09b14e4
)
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