From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.2 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A, SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9D693C388F7 for ; Wed, 28 Oct 2020 23:46:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 47DB0207CD for ; Wed, 28 Oct 2020 23:46:07 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=kernel-dk.20150623.gappssmtp.com header.i=@kernel-dk.20150623.gappssmtp.com header.b="IZ1C3kIa" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388394AbgJ1XqG (ORCPT ); Wed, 28 Oct 2020 19:46:06 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40054 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387927AbgJ1XqF (ORCPT ); Wed, 28 Oct 2020 19:46:05 -0400 Received: from mail-oi1-x242.google.com (mail-oi1-x242.google.com [IPv6:2607:f8b0:4864:20::242]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 56895C0613CF for ; Wed, 28 Oct 2020 16:46:05 -0700 (PDT) Received: by mail-oi1-x242.google.com with SMTP id x1so1374248oic.13 for ; Wed, 28 Oct 2020 16:46:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel-dk.20150623.gappssmtp.com; s=20150623; h=subject:to:cc:references:from:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=6JSP+gknecdQIb43HL25pDbZr81hZ8KDnNrBmTGdQyQ=; b=IZ1C3kIaYcK/G2ClwunxqGHsFv2IHhnNyr3/1dNAioeOVs7VevEtVOQCDqZHuBK5QN ubeC8+K+5JYRFnK0bmP2I1Uo8RsUKENUEmcSIixhppbebvpY8iCTaUDs++CbJaJUZBgu byT/X0NQ24miKZlInT/MCffbrOMl4VR2ITW6vf7srIfVd2uh8YHCeTjcAc9iu/u5aT4S MoMvbJOWYhJEMCmVQnY22EEACVRtqY2yP9mELPJbkjw8J5nboE+tJIuhH7FbwwAJWHE3 TyOAt6jZ0LLPKJiFGaDVnOHPMPfQXAwcfj80dy9D9q5tL6Q31tWe96FfozpRAJMj/BDl mObw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=6JSP+gknecdQIb43HL25pDbZr81hZ8KDnNrBmTGdQyQ=; b=q96UJLCx+8TC+sqQwI0EtW1mkkcQxaAAsk6wwUCx4a33gWptQrko7X1mEqDWR9yS1J G/uPsELFs3gWEoJSSCETXYlZ9hQIrd6vxGq5lXhPYivEpzufzjswiOjleCm43TNdChBa GdW7Mg4pBJ8npY6hFEzIGPnzLUk8VtCEAiqf5frB5uBKQpkZ6dtFaxRMfSiUS1yd34TX j2rbVflfsGcSN3r4/xSbyCGKmPIWGrI+sVojefWHRTDe3c1KiPPxtgwxWcRyP0d/jnIZ WNJbtA3btSNwO5hbGGj1O9aIAle1EY6JK5Oo8mmjjJdBhxZRYR9ZncmXUX7sOOJdO0yn KanQ== X-Gm-Message-State: AOAM531K7fhUI4JVEtBeQs8buDc3Mw66C9Q2tswPjBCpdc4HDqJXJRs7 TzRR1lrqYNhaKWTQPpopFIVftDf7p1R4uw== X-Google-Smtp-Source: ABdhPJyZSVd+JZaAYxUeIMvPGFoUD0i3wI32yHTc5e5c7SW3PYC40SS0vy9uNw2huBZNAxs4EV6Z3A== X-Received: by 2002:a17:90b:3842:: with SMTP id nl2mr4612274pjb.202.1603852862019; Tue, 27 Oct 2020 19:41:02 -0700 (PDT) Received: from [192.168.1.134] ([66.219.217.173]) by smtp.gmail.com with ESMTPSA id f4sm3205726pjs.8.2020.10.27.19.41.00 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 27 Oct 2020 19:41:01 -0700 (PDT) Subject: Re: [PATCH v2 1/1] null_blk: synchronization fix for zoned device To: Kanchan Joshi , Damien.LeMoal@wdc.com Cc: linux-kernel@vger.kernel.org, linux-block@vger.kernel.org, stable@vger.kernel.org, selvakuma.s1@samsung.com, nj.shetty@samsung.com, javier.gonz@samsung.com References: <20200928095549.184510-1-joshi.k@samsung.com> <20200928095549.184510-2-joshi.k@samsung.com> From: Jens Axboe Message-ID: Date: Tue, 27 Oct 2020 20:40:59 -0600 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <20200928095549.184510-2-joshi.k@samsung.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 9/28/20 3:55 AM, Kanchan Joshi wrote: > Parallel write,read,zone-mgmt operations accessing/altering zone state > and write-pointer may get into race. Avoid the situation by using a new > spinlock for zoned device. > Concurrent zone-appends (on a zone) returning same write-pointer issue > is also avoided using this lock. Applied, thanks. -- Jens Axboe