Slava Barinov posted on Thu, 03 Oct 2013 08:50:06 +0400 as excerpted: > Good day. > > I've got a failure with btrfs balance. In fact I started btrfs balance > /btr and got a total filesystem freeze. After I tried applying balance > pause or balance cancel the following crashdump appeared and btrfs > tool freezed. > Reboot changed nothing: I've got totally the same crashdump. > So I mounted filesystem with skip_balance option and tried to cancel > balance. It worked. Then I performed a btrfsck on my fs and it found > nothing suspicious. So I believe it is just a balance bug. I suppose > that could be because of lack of free space on device but should not > filesystem reject balancing instead of crashing? > > [ 117.078876] btrfs: continuing balance > ------------[ cut here ]------------ > [ 152.195487] kernel BUG at fs/btrfs/relocation.c:1055! > [ 152.198432] invalid opcode: 0000 [#1] SMP > # btrfs --version Btrfs v0.20-rc1-358-g194aa4a > > Kernel is just 3.11.3-gentoo. -ray is my machine config and several > custom modules which are not loaded now. Greetings fellow gentooer! =:^) IIRC balances bugging out with invalid opcode 0000, but working properly on a fresh boot, were a known issue on 3.11. I know I had the problem here. I /believe/ that issue was fixed by a patch that went in between 3.12-rc1 and 3.12-rc2, and I /think/ the same patch is queued for stable, but due to a miscommunication with Greg KH where he was waiting on the btrfs folks who were waiting on him, the btrfs patches for stable didn't make it into 3.11.3. However, it /should/ be in the /next/ set 3.11-stable release, as they uncrossed their signals and GKH said he'd pull them this time. (You can see the thread for the crossed signals just a couple days ago I think, on this list. Of course the thread for that patch and the reports of problems without it will be back a bit further...) -- 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 -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
