netdev - Re: user space virtio-net exits with "truncating packet" error

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Message-ID: <4A0C0DBF.3010201@Voltaire.com>
Date:	Thu, 14 May 2009 15:25:35 +0300
From:	Or Gerlitz <ogerlitz@...taire.com>
To:	Mark McLoughlin <markmc@...hat.com>
CC:	Rusty Russell <rusty@...tcorp.com.au>, Avi Kivity <avi@...hat.com>,
	netdev@...r.kernel.org, Gregory Haskins <ghaskins@...ell.com>,
	qemu-devel <qemu-devel@...gnu.org>,
	Anthony Liguori <anthony@...emonkey.ws>
Subject: Re: user space virtio-net exits with "truncating packet" error

Mark McLoughlin wrote:
> That sounds like a bug in qemu's mergeable receive buffers
> implementation - the host is running out of buffers for the packet, even
> though it supposedly has already checked that there is enough buffers
> available on the ring.
> 
> Hmm, I think I see the bug - does the patch below work? Please try
> several mtu values around the 9k mark to be sure

No, it doesn't help, same crash.

Or.
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