From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrew Morton Subject: Re: [patch 1/4] net: percpufy frequently used vars -- add percpu_counter_mod_bh Date: Wed, 8 Mar 2006 15:43:21 -0800 Message-ID: <20060308154321.0e779111.akpm@osdl.org> References: <20060308015808.GA9062@localhost.localdomain> <20060308015934.GB9062@localhost.localdomain> <20060307181301.4dd6aa96.akpm@osdl.org> <20060308202656.GA4493@localhost.localdomain> <20060308203642.GZ5410@kvack.org> <20060308210726.GD4493@localhost.localdomain> <20060308211733.GA5410@kvack.org> <20060308222528.GE4493@localhost.localdomain> <20060308224140.GC5410@kvack.org> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Cc: kiran@scalex86.org, linux-kernel@vger.kernel.org, davem@davemloft.net, netdev@vger.kernel.org, shai@scalex86.org Return-path: To: Benjamin LaHaise In-Reply-To: <20060308224140.GC5410@kvack.org> Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org Benjamin LaHaise wrote: > > On Wed, Mar 08, 2006 at 02:25:28PM -0800, Ravikiran G Thirumalai wrote: > > Then, for the batched percpu_counters, we could gain by using local_t only for > > the UP case. But we will have to have a new local_long_t implementation > > for that. Do you think just one use case of local_long_t warrants for a new > > set of apis? > > I think it may make more sense to simply convert local_t into a long, given > that most of the users will be things like stats counters. > Yes, I agree that making local_t signed would be better. It's consistent with atomic_t, atomic64_t and atomic_long_t and it's a bit more flexible. Perhaps. A lot of applications would just be upcounters for statistics, where unsigned is desired. But I think the consistency argument wins out.