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On 04/10/2012 02:24 PM, Chris Mason wrote:
On Tue, Apr 10, 2012 at 01:39:14PM -0600, Jim Schutt wrote:Hi, I hit this BUG today. I'm running 3.3.1 merged with the ceph and btrfs bits for 3.4, i.e. 3.3.1 + commit bc3f116fec194 "Btrfs: update the checks for mixed block groups with big metadata blocks" commit c666601a935b9 "rbd: move snap_rwsem to the device, rename to header_rwsem" The btrfs filesystem in question is backing a Ceph OSD under a heavy write load. Here's the bug: [510342.517157] ------------[ cut here ]------------ [510342.521855] kernel BUG at fs/btrfs/extent_io.c:3982!Could you please confirm that line number is this BUG_ON() BUG_ON(extent_buffer_under_io(eb));
Yep, that's definitely it: git blame fs/btrfs/extent_io.c | grep -w 3982 0b32f4bb (Josef Bacik 2012-03-13 09:38:00 -0400 3982) BUG_ON(extent_buffer_under_io(eb));
Josef has a theory on this one, but I want to make sure we're chasing the right thing.
Great, thanks. I'll be happy to test any patches, if needed. -- Jim
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