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=-4.9 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, 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 8C0C5C47093 for ; Sun, 30 May 2021 23:07:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 64691611AB for ; Sun, 30 May 2021 23:07:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229901AbhE3XIx (ORCPT ); Sun, 30 May 2021 19:08:53 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37208 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229565AbhE3XIv (ORCPT ); Sun, 30 May 2021 19:08:51 -0400 Received: from mail-lf1-x134.google.com (mail-lf1-x134.google.com [IPv6:2a00:1450:4864:20::134]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EA715C061574 for ; Sun, 30 May 2021 16:07:05 -0700 (PDT) Received: by mail-lf1-x134.google.com with SMTP id a2so13983940lfc.9 for ; Sun, 30 May 2021 16:07:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=message-id:date:from:user-agent:mime-version:to:cc:subject :references:in-reply-to:content-transfer-encoding; bh=wKdqP3siAavLqN9eF024T/2AMtd3S4fvI+WJf6lroUs=; b=HNBfVoA2uH9+k7DzwxascQjMUTlgg/duSGdiSzGxXrYQnCu8IkEoWenClf8rCbIu1C 1YqQCwDrlhCxIX9wf0ssTT3qU+E8DRf+rtLMHJe9gK5llmnmdTUGDThV463dvj3bY/zo Qj8iMs0O88KZXCcpPx6C0fJ2iWF8ybYT5q7j2jlPMkkbNznLfHWsiNGnY0Pl6RknzEc2 6NnU5n+GizUEb1EdhiCkICqpFtT+VdYvuEMyTzQaoeSyN5MFvBn/uTqMktoExZHdLIlY zchwKtDPJQVw66tAJQK0EQGjyyAzY3oKyyhZm7Mf//Sq6QaC8tsLwGWyvU30uhukl3PI d7Bg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:message-id:date:from:user-agent:mime-version:to :cc:subject:references:in-reply-to:content-transfer-encoding; bh=wKdqP3siAavLqN9eF024T/2AMtd3S4fvI+WJf6lroUs=; b=ksusrJ3TUeGC4a6ZnCpxrfXldzOsxBky70TAXMY7pCdhOfaw0FZK9uXVjjzMgxRTdd gYFhiubCvWW+51j0N5LtupzGFLGOSyJQTRT1vGAQYBfd4zkWzfYB0y+HrwcPyQ2IEUmN 2eQRs8a06iSOqRQeQf1hnpOmLzjQepush5mWpphq7nCcTpfj7ZljESRDtDQu11M+kVTr LlRsrosoZsfN/2ZDh20Po3QqlKfzZEpLOmCMNdg8b1TmkBwG3/8OZCY3wHTrWdVWgjjY 4so20fndI8guCePlL0o2N09Xrm3xin+Qeq6sngLnJLk9GZ1qudAnlwChQw1r5vrd0aw3 HvUA== X-Gm-Message-State: AOAM532dWo9/lhn8LYs+/O9pkogCxVhQPEI5XiOYwwIGY+NdqUuT9C0s 0NwzQpUCozQrc/hLJd7CjqEp8393iJJIT3fU X-Google-Smtp-Source: ABdhPJynF7sma/rtUsz3uK+P7xlt9Gn/h01AY3ulA4aG+l6bEMjRI/JrGQclWry7N0fBY6UAz4U2dw== X-Received: by 2002:ac2:5e66:: with SMTP id a6mr13075419lfr.579.1622416024270; Sun, 30 May 2021 16:07:04 -0700 (PDT) Received: from [192.168.0.91] ([188.242.181.97]) by smtp.googlemail.com with ESMTPSA id n15sm1146019lfq.274.2021.05.30.16.07.03 (version=TLS1 cipher=ECDHE-ECDSA-AES128-SHA bits=128/128); Sun, 30 May 2021 16:07:03 -0700 (PDT) Message-ID: <60B41D00.8050801@gmail.com> Date: Mon, 31 May 2021 02:17:20 +0300 From: Nikolai Zhubr User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; ru; rv:1.9.2.4) Gecko/20100608 Thunderbird/3.1 MIME-Version: 1.0 To: Arnd Bergmann CC: netdev , tedheadster , Heiner Kallweit , whiteheadm@acm.org, Jeff Garzik Subject: Re: Realtek 8139 problem on 486. References: <60B24AC2.9050505@gmail.com> <60B2E0FF.4030705@gmail.com> <60B36A9A.4010806@gmail.com> <60B3CAF8.90902@gmail.com> In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Hi all, 30.05.2021 23:54, Arnd Bergmann: [...] >> Unmodified kernel 2.6.2 works fine, unmodified kernel 2.6.3 shows >> reproducable connectivity issues. >> >> The diff is not small, I'm not sure I can dig through. >> Any hints/ideas greatly appreciated. > > This is apparently when NAPI was introduced into the driver. > > One thing I noticed here was the handling for shared IRQs changing in > the process. Do you happen to have shared IRQs, and if so, can you I think this IRQ is not shared: # cat /proc/interrupts CPU0 0: 322570 XT-PIC timer 1: 8 XT-PIC i8042 2: 0 XT-PIC cascade 9: 896 XT-PIC eth0 14: 18000 XT-PIC ide0 NMI: 0 ERR: 0 # dmesg | grep -i irq eth0: RealTek RTL8139 at 0xc4800000, 00:11:6b:32:85:74, IRQ 9 ide0 at 0x1f0-0x1f7,0x3f6 on irq 14 serio: i8042 AUX port at 0x60,0x64 irq 12 serio: i8042 KBD port at 0x60,0x64 irq 1 However indeed, it seems a problem was introduced with a rework of interrupt handling (rtl8139_interrupt) in 2.6.3, because I have already pushed all other differences from 2.6.3 to 2.6.2 and it still keeps working fine. My resulting minimized diff is still ~300 lines, it is too big and complicated to be usefull to post here as is. Thank you, Regards, Nikolai > change it so this card has an IRQ that is not shared with any other > device? > > Arnd >