From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Paul E. McKenney" Subject: Re: [PATCH 7/9] rhashtable: Per bucket locks & deferred expansion/shrinking Date: Tue, 20 Jan 2015 21:36:20 -0800 Message-ID: <20150121053620.GZ9719@linux.vnet.ibm.com> References: <063D6719AE5E284EB5DD2968C1650D6D1CACADAF@AcuExch.aculab.com> <20150116165302.GE15052@casper.infradead.org> <20150116183626.GS30132@acer.localdomain> <20150116191831.GA26730@casper.infradead.org> <20150116193557.GU30132@acer.localdomain> <20150116204644.GA2232@salvia> <20150119090121.GG9719@linux.vnet.ibm.com> <20150121052333.GA23382@gondor.apana.org.au> <20150121052907.GY9719@linux.vnet.ibm.com> <20150121053025.GA23481@gondor.apana.org.au> Reply-To: paulmck@linux.vnet.ibm.com Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Pablo Neira Ayuso , Patrick McHardy , Thomas Graf , David Laight , "davem@davemloft.net" , "netdev@vger.kernel.org" , "edumazet@google.com" , "john.r.fastabend@intel.com" , "josh@joshtriplett.org" , "netfilter-devel@vger.kernel.org" To: Herbert Xu Return-path: Content-Disposition: inline In-Reply-To: <20150121053025.GA23481@gondor.apana.org.au> Sender: netdev-owner@vger.kernel.org List-Id: netfilter-devel.vger.kernel.org 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