Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934250Ab3CMU1Z (ORCPT ); Wed, 13 Mar 2013 16:27:25 -0400 Received: from mail-wi0-f182.google.com ([209.85.212.182]:48366 "EHLO mail-wi0-f182.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933178Ab3CMU1Y (ORCPT ); Wed, 13 Mar 2013 16:27:24 -0400 MIME-Version: 1.0 Reply-To: sedat.dilek@gmail.com In-Reply-To: References: <1363184193-1796-1-git-send-email-miklos@szeredi.hu> <20130313181251.GA6023@sgi.com> <5140C77E.7030206@openwrt.org> <87k3pbhy7o.fsf@xmission.com> Date: Wed, 13 Mar 2013 21:27:22 +0100 Message-ID: Subject: Re: [PATCH 0/9] overlay filesystem: request for inclusion (v17) From: Sedat Dilek To: Linus Torvalds Cc: "Eric W. Biederman" , Felix Fietkau , Robin Holt , Miklos Szeredi , Al Viro , linux-fsdevel , Linux Kernel Mailing List , Christoph Hellwig , Andrew Morton , Robo Bot , Neil Brown , Jordi Pujol , ezk@fsl.cs.sunysb.edu, David Howells , Sedat Dilek , "J. R. Okajima" , Miklos Szeredi 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: 2369 Lines: 65 On Wed, Mar 13, 2013 at 8:58 PM, Linus Torvalds wrote: > On Wed, Mar 13, 2013 at 12:54 PM, Eric W. Biederman > wrote: >>> >>> Hehe, I just checked my new kernel... that does not work (nothing in the logs). >>> But I think it's good to see if the filesystem is registered/loaded. >> >> lsmod | grep overlayfs > > How about the compiled-in case? What's wrong with just using the > obvious /proc/filesystems? > As I don't need OverlayFS in my daily life, I have it here built as a module. Nevertheless, as module or built-in /me as an end-user wants to know what's going on. So, dmesg is normally my first weapon. I grep-ed trrough a bit through all the filesystems in fs/ and it is not handled unique. "Loaded" BTW is not the right term in FS-folks-jargon: The functions are called (un)register_filesystem(). $ dmesg | grep -i loaded [ 0.241037] vgaarb: loaded [ 0.241243] libata version 3.00 loaded. [ 0.358574] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 252) [ 0.368711] brd: module loaded [ 0.369832] loop: module loaded [ 0.650086] PM: Hibernation image not present or could not be loaded. [ 0.651150] Loaded X.509 cert 'Magrathea: Glacier signing key: e75e3a59e59cb48db975ac12e21a905289ada56f' [ 1.788947] r8169 Gigabit Ethernet driver 2.3LK-NAPI loaded [ 8.617549] lp: driver loaded but no devices found [ 10.490721] wmi: Mapper loaded [ 11.994985] iwlwifi 0000:01:00.0: loaded firmware version 18.168.6.1 [ 73.885056] squashfs: loaded [ 81.345070] overlayfs: loaded I am not sure whether those lines "blabla: module loaded" is true for loop (block) it is a hardcoded printk-line. I doubt... CONFIG_BLK_DEV_LOOP=y Last but not least, user-space apps like GRUB trigger fs loaded. For me this is helpful. You might be bored or whatever reason I can't or don't want to understand. And just to have some fun about status informations: Check your drm (kms) driver with date and version :-). Stuff that is not maintained should be thrown out (yes, I had sent patches...). - Sedat - > Linus -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/