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=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,URIBL_BLOCKED autolearn=ham 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 4CC5CECDFB3 for ; Tue, 17 Jul 2018 18:11:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0BF5A20693 for ; Tue, 17 Jul 2018 18:11:45 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 0BF5A20693 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=marvell.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730003AbeGQSp2 (ORCPT ); Tue, 17 Jul 2018 14:45:28 -0400 Received: from mx0b-0016f401.pphosted.com ([67.231.156.173]:41894 "EHLO mx0b-0016f401.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729695AbeGQSp2 (ORCPT ); Tue, 17 Jul 2018 14:45:28 -0400 Received: from pps.filterd (m0045851.ppops.net [127.0.0.1]) by mx0b-0016f401.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id w6HI5B07009167; Tue, 17 Jul 2018 11:11:05 -0700 Received: from sc-exch04.marvell.com ([199.233.58.184]) by mx0b-0016f401.pphosted.com with ESMTP id 2k7gpga449-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-SHA384 bits=256 verify=NOT); Tue, 17 Jul 2018 11:11:05 -0700 Received: from IL-EXCH03.marvell.com (10.5.102.220) by SC-EXCH04.marvell.com (10.93.176.84) with Microsoft SMTP Server (TLS) id 15.0.1210.3; Tue, 17 Jul 2018 11:11:03 -0700 Received: from SC-EXCH02.marvell.com (10.93.176.82) by IL-EXCH03.marvell.com (10.5.102.220) with Microsoft SMTP Server (TLS) id 15.0.1210.3; Tue, 17 Jul 2018 21:11:00 +0300 Received: from maili.marvell.com (10.93.176.43) by SC-EXCH02.marvell.com (10.93.176.82) with Microsoft SMTP Server id 15.0.1210.3 via Frontend Transport; Tue, 17 Jul 2018 11:11:00 -0700 Received: from [10.4.50.2] (unknown [10.4.50.2]) by maili.marvell.com (Postfix) with ESMTP id 0C7673F7040; Tue, 17 Jul 2018 10:35:37 -0700 (PDT) Subject: Re: dvb usb issues since kernel 4.9 To: Linus Torvalds References: <1d3d0fe3-bc02-7720-15ac-6bc06e00067c@marvell.com> CC: Jonathan Corbet , David Miller , "Eric Dumazet" , Greg Kroah-Hartman , Josef Griebichler , Hannes Frederic Sowa , Jesper Dangaard Brouer , Linux Kernel Mailing List , Linux Media Mailing List , USB list , "Mauro Carvalho Chehab" , Ingo Molnar , Network Development , Paolo Abeni , Peter Zijlstra , Rik van Riel , Alan Stern , dma , , Dan Williams , , , From: Hanna Hawa Message-ID: <361dec80-081e-c796-2052-71d006b84ffc@marvell.com> Date: Tue, 17 Jul 2018 21:07:36 +0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.4.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset="utf-8"; format=flowed Content-Transfer-Encoding: 7bit X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-07-17_04:,, signatures=0 X-Proofpoint-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=898 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1806210000 definitions=main-1807170189 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Linus, On 07/17/2018 08:09 PM, Linus Torvalds wrote: > On Tue, Jul 17, 2018 at 4:58 AM Hanna Hawa wrote: >> >> After some debug/bisect/diff, found that patch "softirq: Let ksoftirqd >> do its job" is problematic patch. > > Ok, this thread died down without any resolution. > >> - Using v4.14.0 (including softirq patch) and the additional fix >> proposed by Linus - no timeout issue. > > Are you talking about the patch that made HI_SOFTIRQ and > TASKLET_SOFTIRQ special, and had this: > > #define SOFTIRQ_NOW_MASK ((1 << HI_SOFTIRQ) | (1 << TASKLET_SOFTIRQ)) > > in it? yes, exactly.. Link to the patch: https://git.linuxtv.org/mchehab/experimental.git/commit/?h=v4.15%2bmedia%2bdwc2&id=ccf833fd4a5b99c3d3cf2c09c065670f74a230a7 Thanks, Hanna > > I think I'll just commit the damn thing. It's hacky, but it's simple, > and it never got applied because we had smarter suggestions. But the > smarter suggestions never ended up being applied either, so.. > > Linus >