From mboxrd@z Thu Jan 1 00:00:00 1970 From: Nikolay Aleksandrov Subject: Re: reproducable panic eviction work queue Date: Sat, 18 Jul 2015 17:32:13 +0200 Message-ID: <55AA717D.8080800@cumulusnetworks.com> 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> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: Eric Dumazet , "nikolay@redhat.com" , "davem@davemloft.net" , "fw@strlen.de" , "chutzpah@gentoo.org" , Robin Geuze , Frank Schreuder , netdev To: Johan Schuijt Return-path: Received: from mail-wg0-f54.google.com ([74.125.82.54]:36630 "EHLO mail-wg0-f54.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751437AbbGRPcQ (ORCPT ); Sat, 18 Jul 2015 11:32:16 -0400 Received: by wgbcc4 with SMTP id cc4so8368481wgb.3 for ; Sat, 18 Jul 2015 08:32:15 -0700 (PDT) In-Reply-To: <22C5EB62-8974-432D-9C3B-45F4E4067A45@transip.nl> Sender: netdev-owner@vger.kernel.org List-ID: On 07/18/2015 05:28 PM, Johan Schuijt wrote: > Thx for your looking into this! >=20 >> >> Thank you for the report, I will try to reproduce this locally >> Could you please post the full crash log ? >=20 > Of course, please see attached file. >=20 >> Also could you test >> with a clean current kernel from Linus' tree or Dave's -net ? >=20 > Will do. >=20 >> 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 ? >=20 > This varies a bit across our systems, but we=E2=80=99ve managed to re= produce this with IRQs pinned on as many as 2,4,8 or 20 cores. >=20 > 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 but I don't have as many machines to test right now and had to improvise wi= th VMs. :-) >=20 > I=E2=80=99ll make sure to keep you posted on all the results then. We= have a kernel dump of the panic, so if you need me to extract any data= from there just let me know! (Some instructions might be needed) >=20 > - Johan >=20 Great, thank you!