From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754419AbaKDOqS (ORCPT ); Tue, 4 Nov 2014 09:46:18 -0500 Received: from zeniv.linux.org.uk ([195.92.253.2]:40886 "EHLO ZenIV.linux.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754178AbaKDOqO (ORCPT ); Tue, 4 Nov 2014 09:46:14 -0500 Date: Tue, 4 Nov 2014 14:46:11 +0000 From: Al Viro To: Jan Kara Cc: hch@lst.de, linux-fsdevel@vger.kernel.org, LKML Subject: Re: [PATCH 2/4] chardev: Increment cdev reference count when i_cdev references it Message-ID: <20141104144611.GE7996@ZenIV.linux.org.uk> References: <1414008853-13200-1-git-send-email-jack@suse.cz> <1414008853-13200-3-git-send-email-jack@suse.cz> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1414008853-13200-3-git-send-email-jack@suse.cz> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Oct 22, 2014 at 10:14:11PM +0200, Jan Kara wrote: > Currently i_cdev reference to a character device isn't accounted in the > reference count of the character device. This then requires us to track > all references through a list of all inodes referencing a character > device which is somewhat clumsy and requires list_head in each inode in > the system. > > So make i_cdev a reference like any other. So no rmmod for you until an inode of character device node you had closed a while ago finally gets evicted from icache? Or am I misreading you?