linux-kernel - Re: [PATCH] sunrpc: allow SOMAXCONN backlogged TCP connections

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Message-ID: <174498478558.3618.5006356093533762788.b4-ty@oracle.com>
Date: Fri, 18 Apr 2025 10:00:13 -0400
From: cel@...nel.org
To: Trond Myklebust <trondmy@...nel.org>,
	Anna Schumaker <anna@...nel.org>,
	NeilBrown <neil@...wn.name>,
	Olga Kornievskaia <okorniev@...hat.com>,
	Dai Ngo <Dai.Ngo@...cle.com>,
	Tom Talpey <tom@...pey.com>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	Simon Horman <horms@...nel.org>,
	Jeff Layton <jlayton@...nel.org>
Cc: Chuck Lever <chuck.lever@...cle.com>,
	linux-nfs@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org,
	Trond Myklebust <trond.myklebust@...merspace.com>
Subject: Re: [PATCH] sunrpc: allow SOMAXCONN backlogged TCP connections

From: Chuck Lever <chuck.lever@...cle.com>

On Thu, 17 Apr 2025 14:54:36 -0400, Jeff Layton wrote:
> The connection backlog passed to listen() denotes the number of
> connections that are fully established, but that have not yet been
> accept()ed. If the amount goes above that level, new connection requests
> will be dropped on the floor until the value goes down. If all the knfsd
> threads are bogged down in (e.g.) disk I/O, new connection attempts can
> stall because of this.
> 
> [...]

Applied to nfsd-testing, thanks!

[1/1] sunrpc: allow SOMAXCONN backlogged TCP connections
      commit: 1fe4a78475a5203a9ee1d9ede1bc2043cb505382

--
Chuck Lever