From mboxrd@z Thu Jan 1 00:00:00 1970 From: Frank Schreuder Subject: Re: reproducable panic eviction work queue Date: Mon, 20 Jul 2015 14:47:37 +0200 Message-ID: <55ACEDE9.3090205@transip.nl> References: <1437209795.1026.31.camel@edumazet-glaptop2.roam.corp.google.com> <5FD5C17E-B321-404E-80A2-EE46BB8AA746@transip.nl> <55AA243D.5020306@cumulusnetworks.com> <22C5EB62-8974-432D-9C3B-45F4E4067A45@transip.nl> <55AA717D.8080800@cumulusnetworks.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: Eric Dumazet , "nikolay@redhat.com" , "davem@davemloft.net" , "fw@strlen.de" , "chutzpah@gentoo.org" , Robin Geuze , netdev To: Nikolay Aleksandrov , Johan Schuijt Return-path: Received: from mail-am1on0116.outbound.protection.outlook.com ([157.56.112.116]:16304 "EHLO emea01-am1-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1753249AbbGTNUK (ORCPT ); Mon, 20 Jul 2015 09:20:10 -0400 In-Reply-To: <55AA717D.8080800@cumulusnetworks.com> Sender: netdev-owner@vger.kernel.org List-ID: On 7/18/2015 05:32 PM, Nikolay Aleksandrov wrote: > On 07/18/2015 05:28 PM, Johan Schuijt wrote: >> Thx for your looking into this! >> >>> Thank you for the report, I will try to reproduce this locally >>> Could you please post the full crash log ? >> Of course, please see attached file. >> >>> Also could you test >>> with a clean current kernel from Linus' tree or Dave's -net ? >> Will do. >> >>> These are available at: >>> git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git >>> git://git.kernel.org/pub/scm/linux/kernel/git/davem/net >>> respectively. >>> >>> One last question how many IRQs do you pin i.e. how many cores >>> do you actively use for receive ? >> This varies a bit across our systems, but we=E2=80=99ve managed to r= eproduce this with IRQs pinned on as many as 2,4,8 or 20 cores. >> >> I won=E2=80=99t have access to our test-setup till Monday again, so = I=E2=80=99ll be testing 3 scenario=E2=80=99s then: >> - Your patch > ----- >> - Linux tree >> - Dave=E2=80=99s -net tree > Just one of these two would be enough. I couldn't reproduce it here b= ut > I don't have as many machines to test right now and had to improvise = with VMs. :-) > >> I=E2=80=99ll make sure to keep you posted on all the results then. W= e have a kernel dump of the panic, so if you need me to extract any dat= a from there just let me know! (Some instructions might be needed) >> >> - Johan >> > Great, thank you! > I'm able to reproduce this panic on the following kernel builds: - 3.18.7 - 3.18.18 - 3.18.18 + patch from Nikolay Aleksandrov - 4.1.0 Would you happen to have any more suggestions we can try? Thanks, =46rank --=20 TransIP BV Schipholweg 11E 2316XB Leiden E: fschreuder@transip.nl I: https://www.transip.nl