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=-5.3 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,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 A56FCC4338F for ; Sat, 24 Jul 2021 18:31:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6F6C860C51 for ; Sat, 24 Jul 2021 18:31:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229655AbhGXRvK (ORCPT ); Sat, 24 Jul 2021 13:51:10 -0400 Received: from ste-pvt-msa1.bahnhof.se ([213.80.101.70]:58488 "EHLO ste-pvt-msa1.bahnhof.se" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229530AbhGXRvJ (ORCPT ); Sat, 24 Jul 2021 13:51:09 -0400 X-Greylist: delayed 482 seconds by postgrey-1.27 at vger.kernel.org; Sat, 24 Jul 2021 13:51:09 EDT Received: from localhost (localhost [127.0.0.1]) by ste-pvt-msa1.bahnhof.se (Postfix) with ESMTP id 708C03F5AD; Sat, 24 Jul 2021 20:23:38 +0200 (CEST) X-Virus-Scanned: Debian amavisd-new at bahnhof.se Received: from ste-pvt-msa1.bahnhof.se ([127.0.0.1]) by localhost (ste-pvt-msa1.bahnhof.se [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id LOuImE9sXgre; Sat, 24 Jul 2021 20:23:37 +0200 (CEST) Received: by ste-pvt-msa1.bahnhof.se (Postfix) with ESMTPA id 1EC623F524; Sat, 24 Jul 2021 20:23:36 +0200 (CEST) Received: from [192.168.0.10] (port=59916) by tnonline.net with esmtpsa (TLS1.3) tls TLS_AES_128_GCM_SHA256 (Exim 4.94.2) (envelope-from ) id 1m7MJE-000A1j-Ad; Sat, 24 Jul 2021 20:23:36 +0200 From: Forza Subject: Re: Stack trace with Samba VFS io_uring and large transfers To: Jens Axboe , io-uring@vger.kernel.org References: <83566716-691f-ca91-295b-6d8aaafa50d2@kernel.dk> Message-ID: <49c893e9-8468-f326-9404-d23ed5a4b89f@tnonline.net> Date: Sat, 24 Jul 2021 20:23:36 +0200 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.12.0 MIME-Version: 1.0 In-Reply-To: <83566716-691f-ca91-295b-6d8aaafa50d2@kernel.dk> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-GB Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org Hi! On 2021-07-24 19:04, Jens Axboe wrote: > I'll see if I can reproduce this. I'm assuming samba is using buffered > IO, and it looks like it's reading in chunks of 1MB. Hopefully it's > possible to reproduce without samba with a windows client, as I don't > have any of those. If synthetic reproducing fails, I can try samba > with a Linux client. I attached the logs from both a Windows 10 client and a Linux client (kernel 5.11.0). https://paste.tnonline.net/files/r4yebSzlGEVD_linux-client.txt smbd_smb2_read: fnum 2641229669, file media/vm/libvirt/images/Mint_Cinnamon.img, length=4194304 offset=736100352 read=4194304 [2021/07/24 17:26:09.120779, 3] ../../source3/smbd/smb2_read.c:415(smb2_read_complete) smbd_smb2_read: fnum 2641229669, file media/vm/libvirt/images/Mint_Cinnamon.img, length=4194304 offset=740294656 read=4194304 [2021/07/24 17:26:09.226593, 3] ../../source3/smbd/smb2_read.c:415(smb2_read_complete) smbd_smb2_read: fnum 2641229669, file media/vm/libvirt/images/Mint_Cinnamon.img, length=4194304 offset=748683264 read=4194304