[Bug 219161] VM with virtio-net doesn't receive large UDP packets (e.g 65507 bytes) from host

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https://bugzilla.kernel.org/show_bug.cgi?id=219161

--- Comment #2 from wenli quan (wquan@xxxxxxxxxx) ---
(In reply to Sean Christopherson from comment #1)
> On Thu, Aug 15, 2024, bugzilla-daemon@xxxxxxxxxx wrote:
> > Large UDP packets (e.g 65507 bytes) are not received in VM using virtio-net
> > when sent from host to VM, while smaller packets are received successfully. 
> > 
> > The issue occurs with or without vhost enabled, and can be reproduce with
> > 6.5.0-rc5+
> 
> Is this 100% reproducible?  And did it first show up in 6.5-rc5, i.e. does
> everything work as expected in 6.5-rc4?  If so, bisecting will likely get
> you a
> fast root cause and fix, unless someone happens to know a likely suspect.

Yes, it's 100% reproducible. I also tried with a very old version alongside
6.5-rc5, and the issue still occurs. Unfortunately, I'm not sure which version
could be good, so I haven't started bisecting yet.

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