On Mon, 2022-11-21 at 11:55 +0800, Heng Qi wrote:
> 在 2022/11/21 上午11:33, Xuan Zhuo 写道:
> > On Fri, 18 Nov 2022 09:41:05 +0100, Paolo Abeni <pabeni@xxxxxxxxxx> wrote:
> > > On Fri, 2022-11-18 at 00:33 +0100, Paolo Abeni wrote:
> > > > Recent changes in the veth driver caused a few regressions
> > > > this series addresses a couple of them, causing oops.
> > > >
> > > > Paolo Abeni (2):
> > > > veth: fix uninitialized napi disable
> > > > veth: fix double napi enable
> > > >
> > > > drivers/net/veth.c | 6 ++++--
> > > > 1 file changed, 4 insertions(+), 2 deletions(-)
> > > @Xuan Zhuo: another option would be reverting 2e0de6366ac1 ("veth:
> > > Avoid drop packets when xdp_redirect performs") and its follow-up
> > > 5e5dc33d5dac ("bpf: veth driver panics when xdp prog attached before
> > > veth_open").
> > > option would be possibly safer, because I feel there are other
> > > issues with 2e0de6366ac1, and would offer the opportunity to refactor
> > > its logic a bit: the napi enable/disable condition is quite complex and
> > > not used consistently mixing and alternating the gro/xdp/peer xdp check
> > > with the napi ptr dereference.
> > >
> > > Ideally it would be better to have an helper alike
> > > napi_should_be_enabled(), use it everywhere, and pair the new code with
> > > some selftests, extending the existing ones.
> > >
> > > WDYT?
> > I take your point.
>
> I'll rewrite a patch as soon as possible and resubmit it.
Could you please first send the revert?
Thanks!
Paolo
