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Date: Wed, 13 Apr 2022 18:41:12 +0100 From: David Howells <dhowells@...hat.com> To: Eric Dumazet <edumazet@...gle.com> Cc: dhowells@...hat.com, netdev@...r.kernel.org, Marc Dionne <marc.dionne@...istor.com>, linux-afs@...ts.infradead.org, linux-kernel@...r.kernel.org Subject: Re: [PATCH net] rxrpc: Restore removed timer deletion Eric Dumazet <edumazet@...gle.com> wrote: > ok... so we have a timer and a work queue, both activating each other > in kind of a ping pong ? Yes. I want to emit regular keepalive pokes. > Any particular reason not using delayed works ? Because there's a race between starting the keepalive timer when a new peer is added and when the keepalive worker is resetting the timer for the next peer in the list. This is why I'm using timer_reduce(). delayed_work doesn't currently have such a facility. It's not simple to add because try_to_grab_pending() as called from mod_delayed_work_on() cancels the timer - which is not what I want it to do. David
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