Thread (2 messages) 2 messages, 2 authors, 2025-08-27

Re: [PATCH net] net: hv_netvsc: fix loss of early receive events from host during channel open.

From: patchwork-bot+netdevbpf@kernel.org
Date: 2025-08-27 01:29:58
Also in: linux-hyperv, lkml

Hello:

This patch was applied to netdev/net.git (main)
by Jakub Kicinski [off-list ref]:

On Mon, 25 Aug 2025 04:56:27 -0700 you wrote:
The hv_netvsc driver currently enables NAPI after opening the primary and
subchannels. This ordering creates a race: if the Hyper-V host places data
in the host -> guest ring buffer and signals the channel before
napi_enable() has been called, the channel callback will run but
napi_schedule_prep() will return false. As a result, the NAPI poller never
gets scheduled, the data in the ring buffer is not consumed, and the
receive queue may remain permanently stuck until another interrupt happens
to arrive.

[...]
Here is the summary with links:
  - [net] net: hv_netvsc: fix loss of early receive events from host during channel open.
    https://git.kernel.org/netdev/net/c/9448ccd85336

You are awesome, thank you!
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