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=-2.2 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,HTML_MESSAGE,HTML_TAG_BALANCE_BODY, MAILING_LIST_MULTI,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 7BA1BC4743D for ; Sun, 6 Jun 2021 19:14:41 +0000 (UTC) Received: from mail02.groups.io (mail02.groups.io [66.175.222.108]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 98A7861287 for ; Sun, 6 Jun 2021 19:14:40 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 98A7861287 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=denx.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=bounce+64572+6494+4520388+8129055@lists.cip-project.org X-Received: by 127.0.0.2 with SMTP id MrizYY4521723xYUQRUV66mt; Sun, 06 Jun 2021 12:14:40 -0700 X-Received: from jabberwock.ucw.cz (jabberwock.ucw.cz [46.255.230.98]) by mx.groups.io with SMTP id smtpd.web09.27086.1623006878693008221 for ; Sun, 06 Jun 2021 12:14:39 -0700 X-Received: by jabberwock.ucw.cz (Postfix, from userid 1017) id 54A1F1C0B76; Sun, 6 Jun 2021 21:14:35 +0200 (CEST) Date: Sun, 6 Jun 2021 21:14:33 +0200 From: "Pavel Machek" To: cip-dev@lists.cip-project.org Subject: Re: [cip-dev] BUG: using smp_processor_id() in preemptible [00000000] code: TCPTSK/1809 Message-ID: <20210606191433.GA18130@amd> References: MIME-Version: 1.0 In-Reply-To: User-Agent: Mutt/1.5.23 (2014-03-12) Precedence: Bulk List-Unsubscribe: List-Subscribe: List-Help: Sender: cip-dev@lists.cip-project.org List-Id: Mailing-List: list cip-dev@lists.cip-project.org; contact cip-dev+owner@lists.cip-project.org Reply-To: cip-dev@lists.cip-project.org X-Gm-Message-State: jFOCkmtgp7SSMjYPunPUqtjyx4520388AA= Content-Type: multipart/mixed; boundary="5QFs6L9HTrQmk9CTNfqM" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=lists.cip-project.org; q=dns/txt; s=20140610; t=1623006880; bh=7KSuKqWY7OaevOEtrHkIkla4nQaR6h9AQUj4O5ed6gE=; h=Content-Type:Date:From:Reply-To:Subject:To; b=toimUCnVPpzqDw+wcn+8kD+YRPzImr1ceM12iarIGneZQZic2dPtrCUixVCy/oP00r8 MKqFnMcCoGttM9oz2nHneFSWu1n6BaKg70gB2sxXUzE1yxV7twORfR+4VbZ5h2Vwf+o71 JA6vAtEPUW78ByRgCkl+Wxx2lZGn8foFV9o= --5QFs6L9HTrQmk9CTNfqM Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="k1lZvvs/B4yU6o8G" Content-Disposition: inline --k1lZvvs/B4yU6o8G Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Hi! > Please avoid html on mailing lists. > I'm useing the kernel 4.19.165-cip41-rt18 on the Altera > SOCkit and I encountered an problem with high TCP traffic. I notice you are using -rt kernel. Do you actually need realtime features? Can you try to reproduce the problem on 4.19.193? > Can anybody tell me what problem this message triggers? >=20 > The check_preemption_disabled function is called when > smp_processor_id() is used. This function should be called with > preemtion disabled, but I think migrate_enable will allways enable > preemption ... I believe you got your analysis mostly right, I'd have to study the code some more to see what is going on. Best regards, Pavel --=20 DENX Software Engineering GmbH, Managing Director: Wolfgang Denk HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany --k1lZvvs/B4yU6o8G Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iEYEARECAAYFAmC9HpgACgkQMOfwapXb+vLppgCgse/CYCeAlWPdnh6vKAjWCoVO hpsAoKtJOOxNXpQozC512+cx2dHvwvip =wlyR -----END PGP SIGNATURE----- --k1lZvvs/B4yU6o8G-- --5QFs6L9HTrQmk9CTNfqM Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline -=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D- Links: You receive all messages sent to this group. View/Reply Online (#6494): https://lists.cip-project.org/g/cip-dev/message= /6494 Mute This Topic: https://lists.cip-project.org/mt/83330337/4520388 Group Owner: cip-dev+owner@lists.cip-project.org Unsubscribe: https://lists.cip-project.org/g/cip-dev/leave/8129055/4520388= /727948398/xyzzy [cip-dev@archiver.kernel.org] -=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D- --5QFs6L9HTrQmk9CTNfqM--