netdev - Re: [PATCH 7/9] rhashtable: Per bucket locks & deferred expansion/shrinking

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Date:	Tue, 20 Jan 2015 21:36:20 -0800
From:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:	Herbert Xu <herbert@...dor.apana.org.au>
Cc:	Pablo Neira Ayuso <pablo@...filter.org>,
	Patrick McHardy <kaber@...sh.net>, Thomas Graf <tgraf@...g.ch>,
	David Laight <David.Laight@...LAB.COM>,
	"davem@...emloft.net" <davem@...emloft.net>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"edumazet@...gle.com" <edumazet@...gle.com>,
	"john.r.fastabend@...el.com" <john.r.fastabend@...el.com>,
	"josh@...htriplett.org" <josh@...htriplett.org>,
	"netfilter-devel@...r.kernel.org" <netfilter-devel@...r.kernel.org>
Subject: Re: [PATCH 7/9] rhashtable: Per bucket locks & deferred
 expansion/shrinking

On Wed, Jan 21, 2015 at 04:30:25PM +1100, Herbert Xu wrote:
> On Tue, Jan 20, 2015 at 09:29:07PM -0800, Paul E. McKenney wrote:
> > 
> > Well, you -could- batch them up, so that a single snapshot covered
> > several users, and once that set was done and memory reclaimed, a second
> > snapshot could cover any additional users that requested dumps/walks in
> > the meantime.  Or are users allowed to walk arbitrarily slowly through
> > the table?
> 
> Yes they can.  You could CTRL-Z a dumper quite easily.

OK, never mind, then!  ;-)

							Thanx, Paul

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