netdev - Re: [PATCH 01/11] rxrpc: Add a common object cache

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Message-Id: <20160308.151514.2100824747766658409.davem@davemloft.net>
Date:	Tue, 08 Mar 2016 15:15:14 -0500 (EST)
From:	David Miller <davem@...emloft.net>
To:	dhowells@...hat.com
Cc:	linux-afs@...ts.infradead.org, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 01/11] rxrpc: Add a common object cache

From: David Howells <dhowells@...hat.com>
Date: Tue, 08 Mar 2016 13:02:28 +0000

> David Howells <dhowells@...hat.com> wrote:
> 
>> Does it make sense to maintain a FIFO list of connections (though this would
>> mean potentially taking a spinlock every time I get a packet)?
> 
> It occurs to me that only inactive connections would need to be on an LRU
> list.  Any connection with packets or active calls to deal with wouldn't be on
> the list.

In that kind of scheme you have to decide if it's possible to elide a
response in order to intentionally keep objects off the "inactive" LRU
list.  I bet there is.