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=-2.3 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,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 9B01DC433E0 for ; Fri, 5 Jun 2020 20:21:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 79D4E206E6 for ; Fri, 5 Jun 2020 20:21:49 +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="sQRRF+6F" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728237AbgFEUVt (ORCPT ); Fri, 5 Jun 2020 16:21:49 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49534 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728092AbgFEUVs (ORCPT ); Fri, 5 Jun 2020 16:21:48 -0400 Received: from mail-pj1-x1032.google.com (mail-pj1-x1032.google.com [IPv6:2607:f8b0:4864:20::1032]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 495FEC08C5C3 for ; Fri, 5 Jun 2020 13:21:48 -0700 (PDT) Received: by mail-pj1-x1032.google.com with SMTP id ga6so3128594pjb.1 for ; Fri, 05 Jun 2020 13:21:48 -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=lsaNY1znMuhWXaMnc/rolmE1oxcFFUp17hGPr1rY97U=; b=sQRRF+6FJFYJrF+tlMtHHxvSYj85wVQllZj5/u0RK1uLZ2l9Eg34mVsYN5NXfe6wsw tc0XDG8jEIcIA0kcP0QL5agDaoTKwx+hIxp4mIsHfWLT/txu7EwaZ4anSq9oXUGzC4hC oCO0uP1Hxgwo3ic303jU02yWfqbiUS1iH8FgpMi+P3iJEZoyBE7rdNJl1wV/n7cGxipX hQh1JgOyOAnn/Z8pEf1/Cn37AOThgHiE8/XVkOKXpuswEwr992L88cHF0y8qgi+xtfuc AtOMibKECuD1j/RKQUcy/AfnwvlNJ5byB5NT6GMEdwFMItTaDO4V+7VNxNvNHQHLMtQP KnOA== 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=lsaNY1znMuhWXaMnc/rolmE1oxcFFUp17hGPr1rY97U=; b=Lpm48D18+/2IeYoB8Ud7QZRS4/ZzuzKvdWhv6Dv7ZgDjyfgvExDqZoSugBmZSgLo4T dBHggQaZIiGZT58lAfB1qlQ6aHBMYMog5ahU8zuNbhDJ/C1Of7lmy4RkwNAYZpa2otEJ LnhxwT6raVLkWHikyt5RhbOkcNPFnR4mrJ0XVfL/Tp1mn5gifYBkXKLUe7Dmuyi/UIjs 9IqmGO5lvxxqbxnW0DmSgY5ScWpTTcIgUA/sxLUP1qEh2oA+3A3eOB27eau7evvpczBw 8oavsoGg6Adhe5Muh+T0/LntDyG8FrhOg0+FlRvgzDhGbkX8SCXMRiboRoETMzd8yY0c waKg== X-Gm-Message-State: AOAM532QNartjLAxat4ZthSeM4SDf1lzgE4ixYL+v1gpkX6si6gC6mTR ujp4xYVRVRQwRXxioLpeAeQhJ6d0X58XkQ== X-Google-Smtp-Source: ABdhPJxUYCcV6eTrwlSeDC7QQ+JpnPnlJQKUBydTzbvgKQGAeXuZ+SEtrB0EwChX4HH45w4rFeTHQg== X-Received: by 2002:a17:90b:1108:: with SMTP id gi8mr4824068pjb.144.1591388507489; Fri, 05 Jun 2020 13:21:47 -0700 (PDT) Received: from [192.168.1.188] ([66.219.217.173]) by smtp.gmail.com with ESMTPSA id nl8sm9810832pjb.13.2020.06.05.13.21.46 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 05 Jun 2020 13:21:46 -0700 (PDT) Subject: Re: [PATCHSET v5 0/12] Add support for async buffered reads To: Andres Freund Cc: io-uring@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, akpm@linux-foundation.org References: <20200526195123.29053-1-axboe@kernel.dk> <20200604005916.niy2mejjcsx4sv6t@alap3.anarazel.de> <6eeff14f-befc-a5cc-08da-cb77f811fbdf@kernel.dk> <20200605202028.d57nklzpeolukni7@alap3.anarazel.de> From: Jens Axboe Message-ID: <34b47fac-c162-1a81-2829-965189fa5d3d@kernel.dk> Date: Fri, 5 Jun 2020 14:21:44 -0600 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.8.0 MIME-Version: 1.0 In-Reply-To: <20200605202028.d57nklzpeolukni7@alap3.anarazel.de> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 6/5/20 2:20 PM, Andres Freund wrote: > Hi, > > On 2020-06-05 08:42:28 -0600, Jens Axboe wrote: >> Can you try with async-buffered.7? I've rebased it on a new mechanism, >> and doing something like what you describe above I haven't been able >> to trigger anything bad. I'd try your test case specifically, so do let >> know if it's something I can run. > > I tried my test on async-buffered.7?, and I get hangs very quickly after > starting. Unfortunately, I don't seem to get an OOPSs, not sure yet why. > > Let me know if my test triggers for you. > > I'll go and try to figure out why I don't see an oops... I'll try the reproducer! Thanks for testing. -- Jens Axboe