Re: [PATCH v1 3/3] liveupdate: suppress TCP RST during post-kexec restore window
From: Jakub Kicinski <kuba@kernel.org>
Date: 2026-01-31 01:05:35
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lkml, netdev
On Fri, 30 Jan 2026 22:51:19 +0800 Li Chen wrote:
During a kexec-based live update, userspace may restore established TCP connections after the new kernel has booted (e.g. via CRIU). Any packet arriving for a not-yet-restored socket will hit the no-socket path and trigger a TCP RST, causing the peer to immediately drop the connection.
Can you not add a filter to simply drop those packets until workload is running again? It'd actually be less racy than this hac^w patch ...