Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752678AbaF1MLF (ORCPT ); Sat, 28 Jun 2014 08:11:05 -0400 Received: from mail-qg0-f41.google.com ([209.85.192.41]:62009 "EHLO mail-qg0-f41.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751710AbaF1MLD (ORCPT ); Sat, 28 Jun 2014 08:11:03 -0400 Date: Sat, 28 Jun 2014 08:10:59 -0400 From: Tejun Heo To: cl@linux-foundation.org, kmo@daterainc.com Cc: linux-kernel@vger.kernel.org Subject: Re: [PATCHSET percpu/for-3.17] percpu: implement percpu_ref_reinit() Message-ID: <20140628121059.GC10829@htj.dyndns.org> References: <1403053685-28240-1-git-send-email-tj@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1403053685-28240-1-git-send-email-tj@kernel.org> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Jun 17, 2014 at 09:07:59PM -0400, Tejun Heo wrote: > Hello, > > Currently, percpu_ref destruction - freeing the percpu counter - > happens when the percpu_ref is released. This while a bit more > convenient restricts how percpu_ref can be used. It can't be > initialized with static percpu area and it can't be reinitialized > without going through percpu allocation. > > There are use cases which can take advantage of cycling percpu_ref > through init/release multiple times. This patchset separates out > percpu_ref destruction into percpu_exit() which should be invoked > explicitly and introduces percpu_ref_reinit() which can be used to > recycle a released percpu_ref. > > This patchset doesn't add any users. Patchset to use this will soon > be posted. > > This patchset contains the following six patches. > > 0001-percpu-refcount-aio-use-percpu_ref_cancel_init-in-io.patch > 0002-percpu-refcount-one-bit-is-enough-for-REF_STATUS.patch > 0003-percpu-refcount-add-helpers-for-percpu_count-accesse.patch > 0004-percpu-refcount-use-unsigned-long-for-pcpu_count-poi.patch > 0005-percpu-refcount-require-percpu_ref-to-be-exited-expl.patch > 0006-percpu-refcount-implement-percpu_ref_reinit-and-perc.patch Applied to percpu/for-3.17. Thanks. -- tejun -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/