Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753865AbdF0WNk (ORCPT ); Tue, 27 Jun 2017 18:13:40 -0400 Received: from mail-it0-f42.google.com ([209.85.214.42]:38396 "EHLO mail-it0-f42.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751724AbdF0WNd (ORCPT ); Tue, 27 Jun 2017 18:13:33 -0400 MIME-Version: 1.0 In-Reply-To: References: <1498563601-10949-1-git-send-email-elena.reshetova@intel.com> From: Kees Cook Date: Tue, 27 Jun 2017 15:13:31 -0700 X-Google-Sender-Auth: mVFaxE5b3GhDw21GbpsWpOY7QBY Message-ID: Subject: Re: [PATCH 0/5] v3 block subsystem refcounter conversions To: Jens Axboe Cc: Elena Reshetova , James Bottomley , LKML , linux-block@vger.kernel.org, "linux-scsi@vger.kernel.org" , Linux Btrfs , Peter Zijlstra , Greg KH , fujita.tomonori@lab.ntt.co.jp, Ingo Molnar , Chris Mason , Josef Bacik , David Sterba Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 760 Lines: 21 On Tue, Jun 27, 2017 at 6:26 AM, Jens Axboe wrote: > On 06/27/2017 05:39 AM, Elena Reshetova wrote: >> Changes in v3: >> No changes in patches apart from trivial rebases, but now by >> default refcount_t = atomic_t and uses all atomic standard operations >> unless CONFIG_REFCOUNT_FULL is enabled. This is a compromize for the >> systems that are critical on performance and cannot accept even >> slight delay on the refcounter operations. > > Is that true in 4.12-rc, or is that true in a later release once > Linus has pulled those changes in? If the latter, please resend > this when those changes are in, thanks. It's in -next currently ("locking/refcount: Create unchecked atomic_t implementation") -Kees -- Kees Cook Pixel Security