Re: [PATCH net-next v4 1/1] af_unix: Do not wait for garbage collector in sendmsg()

Jakub Kicinski <[email protected]>
Newsgroups dev.linux.lists.linux-rt-devel,org.kernel.vger.linux-kernel,org.kernel.vger.netdev
Message-ID <[email protected]> 
On Tue,  4 Aug 2026 08:46:16 +0200 Nam Cao wrote:
> AF_UNIX sockets' sendmsg() schedules and blocks on the garbage collector if
> user has too many inflight unix sockets and there is cyclic reference in
> the system. This causes real-time issues, as cyclic reference can be
> created by any task in the system, and high priority tasks who do need to
> send lots of AF_UNIX sockets get blocked by the garbage collector which
> runs as workqueue, causing a priority inversion scenario.

Hi Kuniyuki! Any thoughts?
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