From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from plane.gmane.org ([80.91.229.3]:36433 "EHLO plane.gmane.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753041AbbDFJUY (ORCPT ); Mon, 6 Apr 2015 05:20:24 -0400 Received: from list by plane.gmane.org with local (Exim 4.69) (envelope-from ) id 1Yf3Cg-0000mK-Ef for linux-btrfs@vger.kernel.org; Mon, 06 Apr 2015 11:20:22 +0200 Received: from ip68-231-22-224.ph.ph.cox.net ([68.231.22.224]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Mon, 06 Apr 2015 11:20:22 +0200 Received: from 1i5t5.duncan by ip68-231-22-224.ph.ph.cox.net with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Mon, 06 Apr 2015 11:20:22 +0200 To: linux-btrfs@vger.kernel.org From: Duncan <1i5t5.duncan@cox.net> Subject: Re: Btrfs hangs 3.19-10 Date: Mon, 6 Apr 2015 09:20:12 +0000 (UTC) Message-ID: References: <20150404130047.GC13864@carfax.org.uk> <201504050330.47299.russell@coker.com.au> <20150405100417.GE13864@carfax.org.uk> <2f6a9ac9-0684-4b9a-982e-031286be398e@lists.xtsubasa.org> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-btrfs-owner@vger.kernel.org List-ID: Pavel Volkov posted on Mon, 06 Apr 2015 10:40:03 +0300 as excerpted: > On Sunday, April 5, 2015 1:04:17 PM MSK, Hugo Mills wrote: >> That's these, I think: >> >> #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5) >> #define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF (1ULL << 6) >> >> so it's definitely -O^extref. I don't see where big_metadata comes >> from, though. That's not a -O option. Try with -O^extref and see where >> that gets you. (Also, don't mount the FS on a newer kernel -- it may be >> setting big metadata automatically, although it probably shouldn't do). > > By the way, is there any way to see which options are enabled on a local > filesystem without having to try mounting it with old kernel and > checking dmesg? btrfs-show-super shows what flags are enabled, both numerically and symbolically. At least for btrfs-progs 3.19.1, which I have installed. I'm not sure how far that goes back, but I don't believe it's new functionality, so I'd guess 3.14 at least, but likely not back all the way to 0.19, as that was a very long time ago in btrfs terms. -- Duncan - List replies preferred. No HTML msgs. "Every nonfree program has a lord, a master -- and if you use the program, he is your master." Richard Stallman