Re: [RFC 2/2] dlm: fix socket hang on send buffer limitation with socket error

Hi,

On Fri, Oct 2, 2026 at 7:21 PM Alexander Aring [off-list ref] wrote:

As Sashiko AI bot mentioned [0], a socket connection can get stuck when
the send buffer limitation is reached and a socket error simultaneously
occurs.

This issue can be reproduced with the following setup:
1. Set sk_sndbuf to SOCK_MIN_SNDBUF.
2. Slow down DLM connections using netem.
3. Use tcpkill to randomly send TCP resets to DLM connections.

I ran this over the weekend and wasn't able to get the connection to
get stuck in the mentioned scenario as I think it triggers
.sk_write_space() and .sk_error_report() interleaved randomly.

- Alex