linux-kernel - Re: [PATCH v4 4/4] selftests: net: add a virtio

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Message-ID: <20250424150711.7a255935@kernel.org>
Date: Thu, 24 Apr 2025 15:07:11 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: Bui Quang Minh <minhquangbui99@...il.com>
Cc: virtualization@...ts.linux.dev, "Michael S. Tsirkin" <mst@...hat.com>,
 Jason Wang <jasowang@...hat.com>, Xuan Zhuo <xuanzhuo@...ux.alibaba.com>,
 Andrew Lunn <andrew+netdev@...n.ch>, Eric Dumazet <edumazet@...gle.com>,
 Paolo Abeni <pabeni@...hat.com>, Alexei Starovoitov <ast@...nel.org>,
 Daniel Borkmann <daniel@...earbox.net>, Jesper Dangaard Brouer
 <hawk@...nel.org>, John Fastabend <john.fastabend@...il.com>, Eugenio
 Pérez <eperezma@...hat.com>, "David S. Miller"
 <davem@...emloft.net>, netdev@...r.kernel.org,
 linux-kernel@...r.kernel.org, bpf@...r.kernel.org
Subject: Re: [PATCH v4 4/4] selftests: net: add a virtio_net deadlock
 selftest

On Thu, 24 Apr 2025 17:33:49 +0700 Bui Quang Minh wrote:
> Yes, the kernel returns EBUSY. Loop and retry sounds good to me but it's 
> not easy to get the return code when using bkg(). So for simplicity, 
> I'll retry with sleep(1) 3 times when the xdp_helper fails.

I meant retry _inside_ the xdp_helper :)
That should be pretty easy?