Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751037AbdIITzy (ORCPT ); Sat, 9 Sep 2017 15:55:54 -0400 Received: from mail-vk0-f65.google.com ([209.85.213.65]:34514 "EHLO mail-vk0-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750932AbdIITzx (ORCPT ); Sat, 9 Sep 2017 15:55:53 -0400 X-Google-Smtp-Source: AOwi7QAbS6aPhLxfx7m4GtyP0mKnlO/42tSOD+UIMiyzzB2aWfvkpleKM3x4497yPDNQYALrBrtcvlr0rY09DaAZZ6o= MIME-Version: 1.0 In-Reply-To: <20170909212732.5bc98775@cakuba.netronome.com> References: <20170909194121.39cd9f56@cakuba.netronome.com> <20170909212732.5bc98775@cakuba.netronome.com> From: Dmitry Torokhov Date: Sat, 9 Sep 2017 12:55:51 -0700 Message-ID: Subject: Re: [bisected] Re: Module removal-related regression? To: Jakub Kicinski Cc: LKML , Greg Kroah-Hartman Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1252 Lines: 41 On Sat, Sep 9, 2017 at 12:27 PM, Jakub Kicinski wrote: > On Sat, 9 Sep 2017 19:41:21 +0200, Jakub Kicinski wrote: >> Hi! >> >> I'm having trouble with modules on linux/master. rmmod succeeds but the >> module is still loaded and the refcount goes to 1: >> >> #rmmod nfp; insmod ./src/nfp.ko nfp_pf_netdev=0 ; \ >> /opt/netronome/bin/nfp-hwinfo -n 2 assembly.partno \ >> lsmod | grep nfp; \ >> rmmod nfp; \ >> lsmod | grep nfp >> nfp 249856 0 >> nfp 200704 1 >> >> If I rmmod again the module will be actually unloaded. The user space >> is mostly Ubuntu 14.04. Has anyone seen this? I'm trying to bisect >> now... > > Got 'em! > > commit 1455cf8dbfd06aa7651dcfccbadb7a093944ca65 (HEAD, refs/bisect/bad) > Author: Dmitry Torokhov > Date: Wed Jul 19 17:24:30 2017 -0700 > > driver core: emit uevents when device is bound to a driver Does it happen with all modules or only nfp one? It seems to work here: dtor@dtor-glaptop3:~ $ lsmod | grep psmouse psmouse 135168 0 dtor@dtor-glaptop3:~ $ sudo rmmod psmouse dtor@dtor-glaptop3:~ $ lsmod | grep psmouse dtor@dtor-glaptop3:~ $ sudo modprobe psmouse Thanks. -- Dmitry